We Know insulation Inside And Out

Transcription

The
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Guide
The
Industry Guide
to PIR Thermal
Insulation
We know insulation inside and out
Contents
04
▶
Energy conservation – the rules
06
▶
Celotex – we know insulation inside and out
08
▶
Product descriptions
14
▶
Insulation solutions for pitched roofs
16
Pitched roof sarking
18
Insulation between and over rafters
20
Insulation between rafters
22
Insulation between and under rafters
24
▶
Insulation solutions for flat roofs
26
Built-up flat roofing applications
28
Flat roof insulating deck
30
Insulation between joists
32
34
Insulation between and under joists
▶
Insulation solutions for walls
36
Masonry cavity walls
38
Blockwork comparison list
40
Solid masonry walls (Internal)
42
Solid masonry walls (External)
44
Timber frame wall lining
46
Single timber frame wall lining
48
Timber frame wall sheathing
50
Steel stud framed walls
52
▶
Insulation solutions for floors
54
Calculating the P/A ratio
56
Concrete slab floors
58
Beam and block floors
60
Suspended timber floors
62
Underfloor heating
64
▶
Garage conversions
66
▶
Loft conversions
68
▶
Environmental information
70
▶
Notes
03
Energy conservation – the rules
Building Regulation requirements and The Code for Sustainable Homes
England and Wales Approved Document L1A (2006) – new dwellings
Elemental U-values – indicative only
For regulation compliance, new dwellings
must achieve a CO2 Target Emissions Rate (TER).
This is unique to each dwelling design and is
calculated using Standard Assessment
Procedure (SAP) 2005.
The TER is more easily achieved by specifying
high standards of fabric insulation, resulting in
low U-values.
The U-values shown indicate the standard of
insulation required to meet typical dwelling
TERs and are given for guidance purposes only.
England and Wales Approved Document L1B (2006) – work in existing dwellings
Elemental U-values
UK building regulations require buildings to
be reasonably efficient in their use of energy to
reduce carbon dioxide (CO2) emissions. CO2 has
been identified as the main ‘greenhouse’ gas
responsible for global warming and climate
change. Compliance with the regulations can
be achieved by following the guidance in the
following documents:
This minimises the overall thickness of the
building fabric allowing maximum utilisation
of internal space for a given building ’footprint’.
England and Wales: Approved Document L
Introduced in April 2007, The Code for
Sustainable Homes provides an all round
measure of the sustainability of new homes,
ensuring that sustainable homes deliver real
improvements in key areas such as CO2 emissions.
The code uses a sustainability rating system to
communicate the overall sustainability
performance of a home. The code aims to reduce
further greenhouse gas emissions and ensure
that all future housing stock has fewer negative
impacts on the environment.
Scotland: Technical Handbook – Section 6: Energy
Northern Ireland: Technical Booklet F
An essential requirement of the regulations is to
ensure that the building fabric is well insulated
to prevent excessive heat loss. This reduces the
amount of energy required to provide space
heating. CO2 emissions are reduced as less fossil
fuel (e.g. gas, oil, coal) is burnt to provide the
energy.
Buildings are also required to be more airtight
and for thermal bridging to be reduced. When
applied as a continuous sealed layer, Celotex
insulation completely eliminates the thermal
bridging and provides an effective barrier.
The very low thermal conductivity of Celotex PIR
insulation boards enables low fabric U-values to
be achieved with the minimum of thickness.
04
T: 0901 996 0100*
Under the new regulations existing dwellings
do not have to meet a TER. Instead, they have
to meet so called ‘elemental U-values’ which
refers to target figures for individual floor, wall
and roof elements of the building.
These values are shown in the illustration to
the right.
Scotland Domestic Technical Handbook – Section 6: Energy
Elemental U-values
Under the Scottish regulations dwellings do
not have to meet a target TER. Instead they
have to meet so called ‘elemental U-values’
which refers to target figures for individual
floor, wall and roof elements of the building.
These values are shown in the illustration to
the right.
Note: These values assume a minimum
SEDBUK boiler efficiency of 78% and the total
area of doors, windows and rooflights <25%
of the dwelling’s total floor area.
www.celotex.co.uk
05
Celotex – we know insulation inside and out
When you specify Celotex insulation, you are
accessing an unrivalled product and service
package that has evolved through a process of
constant innovation spanning eight decades.
The evolution continues with intensive product
development across our highly specialised
Celotex product range.
▶ most flexible and versatile insulation type and
ideally suited for floors, walls and roofs.
▶ ideal when self-supporting insulation is
required
Document L we now offer a service to calculate
Standard Assessment Procedure (SAP) ratings for
dwellings and to provide advice on any aspect of
product selection to ensure compliance with the
relevant Building Regulations.
Sustainability
Operating within the construction sector and
specialising in insulation products we are acutely
aware of the energy efficiency and carbon
emission impact of our industry and our
activities.
Euroclass D2.
U-value calculations for all product applications
are also available – or it may be easier to visit us
at www.celotex.co.uk where we offer a free
online U-value facility.
Coupled with our leading Technical Services
Advisory Centre, Celotex is your insulation
specialist of choice.
For further information or to contact our
Technical team, visit www.celotex.co.uk or call
0901 996 0100*.
We are committed to ensuring the environmental
impact of our operations, material specifications,
waste management, packaging and the
distribution of our products is kept to a
minimum. A reduction in our carbon output
remains an environmental goal.
These developments are represented in our
depth of product offer. Celotex offers an
unrivalled range of thicknesses from 12 - 200mm.
Range overview
Our centre is now manned from 8am until
5:15pm to provide the maximum coverage to the
building professional and specifier.
Our accredited environmental profile achieves an
A rating within the ‘2002 Green Guide to
Specification’.
The pursuit of improved energy efficiency, the
reduction of CO2 emissions and, of course, the
drive towards zero carbon will continue to drive
our product and service developments.
Celotex offers the widest range of thicknesses
amongst all companies ranging from 12mm 200mm, with products suitable for floor, wall,
roofing and flat roofing applications.
In addition, exceeding the demands of our
customers, specifiers and trade partners will help
maintain our position as the UK brand leading
provider of PIR thermal insulation.
We have specialist solutions such as for
underfloor heating systems (FF3000), for thermal
bridging (TB3000) as well us our leading general
purpose and multi-functional board GA3000. In
addition our XR3000 range sets a new industry
standard in ‘thick’ insulation board.
Why Celotex PIR Thermal Insulation?
We have also now extended our flat roof
collections with our EL3 board offering
maximum versatility in these applications.
Our newly expanded product range provides
thermal insulation solutions that fully meet the
requirements of current legislation as well as the
demands of building professionals, specifiers and
users.
As pioneers of PIR thermal insulation we continue
to maintain a considerable advantage over our
competitors. This is best reflected in the sum total
of our achievements in product performance and
in-depth knowledge of manufacturing
techniques.
Our PIR insulation offers the following benefits:
▶ low thermal conductivity minimising heat loss
▶ can provide air and moisture barrier
▶ excellent fire performance properties meeting
▶ easy to handle offering no irritation
In line with the requirements of Approved
▶ low emissivity (low-e) value due to our foil
In line with our position as brand leader we are
continually looking to offer an ever improving
service level. The pursuit towards zero carbon and
other such initiatives as the Code for Sustainable
Homes will mean many of our programmes are
not reflected in this guide.
Investment in our products and services to
ensure that we achieve and indeed exceed the
minimum performance requirements set out in
legislation remains a strategic objective of the
Company.
We continue to concentrate on energy efficiency
and reducing CO2 emissions. The use of Celotex
will help you achieve this.
For the latest and most complete information
please visit us at www.celotex.co.uk specifiers
and customers alike.
Technical Service Advisory Centre
facers further improving thermal efficiency
mineral wool leading to thinner insulation
solutions
www.celotex.co.uk
Full product description and specification details
can be found in our flat roofing section, from
page 24.
Staffed by experienced construction specialists,
the Celotex Technical Service Advisory Centre
has earned an excellent reputation for its
comprehensive level of support. No other
insulation board manufacturer can equal the
level of personal assistance that our team offers.
▶ better thermal efficiency, per mm, than
06
▶ easy to cut and shape for intricate details
T: 0901 996 0100*
www.celotex.co.uk
07
Celotex T-Break™ TB3000 is a thin, foil faced
insulation board with unreinforced core foam
(except 35 - 45mm which contain glass fibre
reinforcement) and thicknesses ranging from
12 to 45mm. The T-Break™ name stems from the
design function of the range; which is to provide
simple solutions to overcome localised thermal
bridges. Celotex is unique in being able to offer
boards as thin as 12mm to the market for this
purpose.
Celotex Tuff-R™ GA3000 has long been at
the heart of the Celotex product range,
providing a range of thermal insulation solutions
to the builder. The Celotex Tuff-R™ GA3000
product is a foil faced thermal insulation board
which has core foam uniquely reinforced with
glassfibre. These products still feature the best
reaction-to-fire performance (Euroclass D/s2/d0)
measured in accordance with new European
Standards of any similar product on the market.
Always install Celotex T-Break™ TB3000 in
accordance with the instructions supplied by
Celotex Limited.
Always install Celotex Tuff-R™ GA3000 in
Celotex Limited.
Standard board dimensions
1200mm x 2400mm (with grid markings to assist
installation)
installation)
Physical properties
Physical properties
Thermal resistance (R) values for Celotex
products are declared in accordance with BS EN
13165:2001. These R-values equate to a Thermal
Conductivity (λ) value of 0.023 W/mK.
Fire resistance
Fire resistance
Reaction to fire = Euroclass F in accordance with
BS EN 13823:1997 Part 7 = class 1.
Surface spread of flame in accordance with
BS 476:1997 Part 7 = class 1.
Reaction to fire in accordance with BS EN
13823:2002 = Class D/s2/d0 (except 100mm =
Euroclass F).
BS 476:1997 Part 7 = Class 1.
Celotex Extra-R™ XR3000 is new to the
Celotex range and is manufactured on our latest
state-of-the-art restrained rise production line
featuring our own unique jointless laydown
technology. This technology enables us to offer
thicker boards with no visible seams in the foam
core. This foil faced product will be targeted at
‘cut-to-fit’ applications for insulation between
rafters or joists and will enable users to achieve
lower U-values with a single layer of insulation
which has previously not been possible and will
help designers meet the present and future
requirements of Approved Document L (2006)
of the Building Regulations.
Always install Celotex Extra-R™ XR3000 in
Celotex Limited.
Celotex Double-R™ LG3 is a high
performance insulation board for use in
commercial, agricultural and industrial buildings.
It is offered with a white painted stucco
embossed foil face and approval from the Loss
Prevention Certification Board (LPCB).
Celotex Double-R™ LG3 achieves a class leading
reaction-to-fire performance of Euroclass
B/s2/d0 when measured in accordance with
European Standards. As well as excellent
dimensional stability, LG3 is lightweight, rapidly
installed and provides a semi-decorative finish.
Always install Celotex Double-R™ LG3 in
Celotex Limited.
1200mm x 2400mm
installation)
Physical properties
Physical properties
Fire resistance
BS EN 13823:2002.
Fire resistance
13823:2002 = Class B/s2/d0.
BS 476:1997= Class 0.
Product range
Product range
Product code
TB3012
TB3020
TB3025
TB3030
TB3035
TB3040
TB3045
08
Thickness (mm)
12
20
25
30
35
40
45
R-valve (m2K/W)
0.50
0.85
1.05
1.30
1.50
1.70
1.95
Product code
GA3050
GA3055
GA3060
GA3065
GA3070
GA3075
GA3080
GA3090
GA3100
T: 0901 996 0100*
Thickness (mm)
50
55
60
65
70
75
80
90
100
R-valve (m2K/W)
2.15
2.35
2.60
2.80
3.00
3.25
3.45
3.90
4.30
Product range
Product code
XR3110
XR3120
XR3130
XR3140
XR3150
XR3165
XR3200
Thickness (mm)
110
120
130
140
150
165
200
R-valve (m2K/W)
4.75
5.20
5.65
6.05
6.50
7.15
8.65
Product range
Product code
LG3/25
LG3/30
LG3/40
LG3/50
www.celotex.co.uk
Thickness (mm)
25
30
40
50
R-valve (m2K/W)
1.10
1.35
1.80
2.25
09
Celotex Tuff-R™ CW3000 provides a simple
cavity wall insulation solution with a foil faced
thermal insulation board which has core foam
uniquely reinforced with glassfibre. These
products feature a good reaction-to-fire
performance (Euroclass D/s2/d0) measured in
accordance with new European Standards
compared to any similar product on the market.
Always install Celotex Tuff-R™ CW3000 in
Celotex Limited.
installation)
Celotex Fast-R™ FF3000 is manufactured on
our state-of-the-art restrained rise production
line featuring our own unique jointless laydown
technology. This technology enables us to offer
thicker boards with no visible seams in the foam
core. This foil faced product is targeted
specifically at ‘under screed’ floor applicationsincluding underfloor heating systems – where
the higher density and compressive strength
both prove valuable to the installer.
Always install Celotex Fast-R™ FF3000 in
Celotex Limited.
1200mm x 600mm and 2400mm (with grid
markings to assist installation)
Physical properties
Fire resistance
13823:2002 = Class D/s2/d0 (except
CW3025/CW3030/CW3035/CW3100 = Euroclass F).
BS 476:1997 Part 7 = Class 1.
Physical properties
Fire resistance
BS EN 13823:2002.
Product range
Product code
CW3025
CW3030
CW3035
CW3040
CW3045
CW3050
CW3055
CW3060
CW3065
CW3070
CW3075
CW3080
CW3090
CW3100
10
Thickness (mm)
25
30
35
40
45
50
55
60
65
70
75
80
90
100
R-valve (m2K/W)
1.05
1.30
1.50
1.70
1.95
2.15
2.35
2.60
2.80
3.00
3.25
3.45
3.90
4.30
Celotex Tempchek™ Deck TD3000 provides
a quick and easy way to achieve effective
thermally insulated roof decks for building
structures such as garage roofs where there will
be only occasional trafficking. These products
feature a foil faced insulation board, to give the
best insulation value possible, bonded to a facing
of 5.5mm WBP ply. This allows the user to install
the roof structure in one operation since the
product provides the deck, insulation and vapour
control thereby considerably reducing
installation times ahead of weatherproofing.
Celotex Tempchek™ TA3 is a purpose
Always install Celotex Tempchek™ Deck TD3000
in accordance with the instructions supplied by
Celotex Limited.
Always install Celotex Tempchek™ TA3 in
Celotex Limited.
installation)
installation)
Physical properties
Physical properties
products are declare in accordance with BS EN
Conductivity (λ) value of 0.023 W/mK (foam core).
Thermal resistance (R) values for Celotex products
are declared in accordance with BS EN
Fire resistance (insulation only)
Fire resistance
13823:2002 = Class D/s2/d0 (except
TD3106/TD3116/TD3126 = Euroclass F).
BS 476:1997 Part 7 = Class 1.
Surface spread of flame in accordance with BS
476:1997 Part 7 = Class 1.
T: 0901 996 0100*
Thickness (mm)
50
70
75
85
90
100
125
150
Tempchek™ TA3 performs to a compressive
strength of 150kPa giving improved resistance to
site traffic during installation and comes available
in thicknesses ranging from 50 -150mm.
Product range
Product range
Product code
FF3050
FF3070
FF3075
FF3085
FF3090
FF3100
FF3125
FF3150
designed insulation board for use with
mechanically fixed and ballasted single ply
weathering systems. It provides a quick and easy
way to achieve effective thermal insulation in flat
roofing structures. These boards all feature the
unique jointless lay down system to improve the
flatness of the product.
2
R-valve (m K/W)
2.15
3.00
3.25
3.65
3.90
4.30
5.40
6.50
Product range
Product code
Thickness (mm)
R-valve (m2K/W)
insulation + ply
TD3076
TD3081
TD3086
TD3096
TD3106
TD3116
TD3126
70 + 6.0
75 + 6.0
80 + 6.0
90 + 6.0
100 + 6.0
110 + 6.0
120 + 6.0
3.05
3.30
3.50
3.95
4.35
4.80
5.25
Product code
TA3/50
TA3/70
TA3/75
TA3/85
TA3/90
TA3/100
TA3/125
TA3/150
TA3/110
www.celotex.co.uk
Thickness (mm)
50
70
75
85
90
100
125
150
110
RD-valve (m2K/W)
2.15
3.00
3.25
3.65
3.90
4.30
5.40
6.50
4.75
11
Celotex Energy-Lok™ EL3 is a purposedesigned insulation board for use in built-up flat
roofing applications, including hot-applied
bituminous and mastic asphalt waterproofing
systems and fully adhered single ply membranes.
Energy-Lok™ features a coated glass tissue facer,
perforated on one side for use in bitumen-based
built up applications whilst the reverse
unperforated facer is suitable for fully adhered
single-ply applications. Energy-Lok™ is available
in two different lengths and in a range of
thicknesses allowing you to achieve U-values
with minimum thickness.
Celotex Insulation Clip
Product range
Product code
EL3/50
EL3/80
EL3/90
EL3/95
EL3/100
EL3/110
EL3/120
EL3/140
EL3/150
Always install Celotex Energy-Lok™ EL3 in
Celotex Limited
Thickness (mm)
50
80
90
95
100
110
120
140
150
RD-valve (m2K/W)
1.85
3.05
3.45
3.65
3.80
4.20
4.80
5.60
6.00
Introduction
The Celotex insulation clip has been designed to
enable insulation boards to be installed between
timber joists or rafters quickly and without the need
for nails, screws or battens. They provide a permanent
way of securing the Celotex insulation with as little
fuss as possible.
fig.1
The clip should be used in situations where the
insulation is being installed from above or below, for
example when fitting between joists in a suspended
timer floor.
Using the clip ensures that the insulation will be held
firmly in place once installed in the correct manner.
fig.2
Installation guidelines
▶ The joists should be installed in the conventional
manner in accordance with the Building Regs.
1200mm x 600mm* and 2400mm
Physical properties
Thermal resistance (R) values for Celotex products
are declared in accordance with BS EN
Conductivity λ value of:
0.027W/mK for product thickness under 75mm
0.026W/mK for product thickness between
80 -110mm
0.025W/mK for product thickness of 120mm
or over.
▶ Cut the Celotex insulation boards to the width of
the space between the joists or rafters ensuring a
straight edge to the board to enable a tight
interference fit.
fig.3
▶ Push the insulation clips into the board at 1000mm
intervals with the two prongs piercing the exposed
foam down the long edge of the board (see fig.1).
▶ Start the clips in between the joists and push the
board into place (see fig.2). This should be a tight fit to
minimise heat loss through gaps between the joist
and insulation board.
fig.4
▶ Push the board fully home so that the base of the
insulation clip is level with the face of the joist
(see fig.3).
Fire resistance
External roof exposure = Ext. FAB in accordance
with BS 476-3 1997.
BS EN 13823:2002.
▶ Where additional insulation or plasterboard is
required below the joists, continue as in the Celotex
literature for that application (see fig.4).
fig.5
▶ If additional board security is required, for example
where there is no lining below the joists or rafters,
nail through the base of the clip directly into the joist
(see fig.5).
12
T: 0901 996 0100*
www.celotex.co.uk
13
Insulation between & over rafters
Insulation between & under rafters
The void created by a pitched roof can be made
habitable by insulating along the plane of the
roof pitch with Celotex rigid PIR insulation
boards. This creates a warm, potentially habitable
roof space in which water pipes and tanks no
longer need to be insulated.
Where headroom and rafter depth is limited,
Celotex insulation may be fitted between and
over the rafters. If this two-layer solution is
chosen, it is important that the thermal
resistance of the inner layer (between the
rafters), is less than that of the outer layer (over
the rafters).
If sarking felt is being used, a minimum 50mm
ventilation air space must be provided between
the felt and the cold side of the insulation in
order to minimise the risk of condensation
formation. This is known as ventilated
construction.
If sarking felt is being used, a minimum 50mm
ventilation air space must be provided between
the felt and the cold side of the insulation in
order to minimise the risk of condensation
formation. This is known as ventilated
construction.
With some breathable membranes, the cold side
of the insulation may be placed in direct contact
with the membrane (check with membrane
supplier prior to specification).
With some breathable membranes, the cold side
of the insulation may be placed in direct contact
with the membrane (check with membrane
supplier prior to specification).
However, the outer side of the membrane must
be adjacent to an air space to allow moisture
vapour to escape to the outside of the building.
This is known as unventilated construction.
However, the outer side of the membrane must
be adjacent to an air space to allow moisture
vapour to escape to the outside of the building.
This is known as unventilated construction.
When using over the roof structure as insulating
sarking, Celotex insulation creates a warm roof
structure and eliminates thermal bridging at the
rafters, whilst the foil facings, used in conjunction
with taped joints, provide an effective barrier to
moisture vapour and air leakage. The use of a
single continuous layer of insulation over the
rafters thereby eliminates the risk of
condensation and avoids the need for
ventilation of the rafter space. Where very low
U-values are required, Celotex recommends a
two–layer system in order to reduce the racking
forces on the fasteners required to fix counterbattens to rafters. In this system, the first layer of
insulation is applied as a complete layer over the
rafters. A second, thinner layer is then fitted over
the first layer, between the counter-battens.
14
This reduces the risk of interstitial condensation
between the insulation layers. The condensation
risk also depends upon occupancy and building
use. Celotex therefore recommends that a
condensation risk analysis is obtained to
determine the optimum solution for individual
projects. Please contact the Celotex Technical
Advisory Service for further information.
T: 0901 996 0100*
www.celotex.co.uk
15
Use Celotex Extra-R™ XR3000, Tuff-R™ GA3000 and T-Break™
TB3000 high performance thermal insulation in pitched roof
sarking applications to minimise insulation thickness and give
the following benefits:
▶ Note that specific fixing requirements should be
▶ Fix at maximum 400mm centres along the counter
determined for each roof, taking into account roof
design and location.
▶ Highly efficient ‘warm roof’ insulation over rafters
▶ For optimum thermal performance, the unprinted
batten. Pre-drill pilot holes in the counter battens to
ensure ease of nailing and to reduce the possible
splitting of the timber.
▶ Provides reliable long term energy savings for
foil surface should face adjacent air cavities.
buildings
▶ Fix a treated timber stop batten equal in thickness to
▶ Low emissivity foil facers give improved
the Celotex insulation across the rafters at the eaves.
Butt boards directly against this batten.
thermal insulation with cavity air spaces
▶ Install Celotex insulation boards with the long sides
▶ Eliminates thermal bridging
parallel to the rafter lines with both edges supported
by rafters.
▶ Optional single-layer system
▶ Cut the boards to rake and splay at ridge and verges
▶ Ideal for new build or major refurbishment projects
to ensure close butted joints.
▶ Air-tight construction method
▶ Use large headed nails to fix boards in place
temporarily until permanently secured by counter
battens.
Example U-value calculation
Construction
Outside surface resistance
Tiling including batten space
Breather membrane
Cavity / counter batten
Celotex T-Break™ TB3000 between 47 x 47
counter battens @ 400 ctrs
Variable layer
Polythene 1000 gauge VCL
Cavity (low emissivity) rafter space
Gyproc Wallboard
Inside surface resistance
Variable Layers
Celotex Tuff-R™ GA3000. Joints taped
Thickness
(mm)
22.0
Thermal
Conductivity
(W/mK)
-
Thermal
Resistance
(m²K/W)
0.040
0.120
0.454
11.7% Timber (22.0mm)
25.0
150.0
12.5
-
0.023
0.160
-
1.087
0.454
0.070
0.100
11.7% Timber (25.0mm)
11.7% Timber (150.0mm)
-
Thickness
Thermal
Conductivity
(W/mK)
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
(m²K/W)
0.17
0.18
0.19
0.20
0.20
0.21
0.22
0.24
0.25
(mm)
90.0
80.0
75.0
70.0
65.0
60.0
55.0
50.0
45.0
Bridge
Details
U-value
▶ Position a preservative-treated timber counter
batten (minimum 38 x 50mm) over the insulation on
the line of each rafter. Nail the lower end of each
counter batten directly into the stop batten.
▶ Calculate the length of the stainless helical spike
▶ Cut a second layer of Celotex insulation, which
should be at least 13mm less than the counter batten
thickness, to fit between the counter battens. Secure
the bottom edge to the stop batten with large headed
clout nails. Seal the joints between the boards with
self-adhesive aluminium foil tape.
▶ Fix the tile battens to the counter batten at an
appropriate gauge to suit the slates or tiles selected.
▶ A variety of eaves and verge details may be achieved
with this system. Eaves soffit ventilators are not
generally required.
▶ Where exposed rafters are required, plasterboard (or
any other suitable decorative board) may be laid over
the rafters before fixing the insulation. Select longer
fasteners to suit. Plasterboard should be protected
from rain during installation. A polythene vapour
control layer laid directly over the plasterboard is
recommended.
fixings required by adding together the counter batten
depth, the insulation thickness and depth of
penetration required to the rafter (usually minimum
38mm)
▶ Stainless steel helical spikes have been specifically
developed for ‘warm’ pitched roofs and are especially
appropriate for use with pre-trussed rafter
constructions, allowing a much thinner gauge of
fastener to be used, thus reducing the risk of splitting
timber battens or rafters.
U-value
For U-values see variable layer list
(Correction for mechanical fasteners, Delta Uf = 0.000W/m²K)
(Correction for air gaps, Delta Ug = 0.000W/m²K)
(Based on the combined method for determining U-values of structures containing repeating thermal bridges.)
16
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17
Use Celotex Tuff-R™ GA3000 high performance thermal
insulation in pitched roof between and over rafter applications to
minimise insulation thickness and give the following benefits:
Insulation over the rafters
Insulation between the rafters
▶ Note that specific fixing requirements should be
▶ For optimum thermal performance the unprinted
foil surface should face the rafter air cavity.
determined for each roof, taking into account roof
design and location.
buildings
▶ Fix a treated timber stop batten equal in thickness to
the inside face of the rafters, prior to cutting the board.
▶ Creates a warm habitable roof space
the Celotex insulation across the rafters at the eaves.
Butt boards directly against this batten.
▶ Cut the Celotex insulation at a slight angle, making
▶ Ideal for use where headroom is limited
▶ No need to insulate water pipes and tanks
▶ Install Celotex insulation boards with the long sides
▶ Suitable for new build and major
refurbishment projects
parallel to the rafter lines with both edges supported
by rafters.
▶ Minimised additional loading to the structure
▶ Cut the board to rake and splay at ridge and verges
to ensure close butted joints.
place, until permanently secured by counter battens.
▶ Position a preservative-treated timber counter
Construction
Tiling including batten space
Counter batten
Breather membrane
Variable layer
Celotex Tuff-R™ GA3000 between
rafters @ 400 ctrs
Cavity (low emissivity) rafter space
Polythene, 1000 gauge VCL
Gyproc Wallboard
Variable Layers
Celotex Tuff-R™ GA3000 over rafter
Thickness
Thermal
Conductivity
(W/mK)
-
Thermal
Resistance
(m²K/W)
0.100
0.000
0.000
-
Bridge
Details
(mm)
38.0
40.0
110.0
12.5
-
0.023
0.160
-
1.739
0.454
0.080
0.100
11.7% Timber (40.0mm)
11.7% Timber (110.0mm)
-
Thickness
Themal
Conductivity
(W/mK)
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
U-value
(mm)
90.0
80.0
75.0
70.0
65.0
60.0
55.0
50.0
45.0
-
(m²K/W)
0.17
0.18
0.19
0.19
0.20
0.21
0.22
0.23
0.25
the board width slightly oversized on one surface to
achieve a ‘friction fit’.
▶ Push the board into the void between the rafters
until it is tight against the underside of the first layer of
insulation.
▶ Fit the insulation to the ridge plate and carry over or
▶ Use large headed nails to temporarily fix board in
Example U-value calculation: unventilated
▶ Accurately measure the width to be filled between
Insulation between and over rafters
tightly butt the wall plate at eaves.
▶ Finish with plasterboard or other suitable sheet
material, fixed directly to the underside of the rafters.
batten (minimum 38 x 50mm) over the insulation on
the line of each rafter. Nail the lower end of each
counter batten directly into the stop batten.
▶ Calculate the length of the stainless helical spike
fixings required by adding together the counter batten
depth, the insulation thickness and depth of
penetration required into the rafter (usually minimum
38mm).
▶ Stainless steel helical spikes have been specifically
developed for ‘warm’ pitched roofs and are especially
appropriate for use with pre-trussed rafter
constructions, allowing a much thinner gauge of
fastener to be used, thus reducing the risk of splitting
timber battens or rafters.
▶ Fix at maximum 400mm centres along the counter
batten. Pre-drill pilot holes in the counter battens to
ensure ease of nailing and to reduce the possible
splitting of the timber.
U-value
18
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19
Use Celotex Extra-R™ XR3000 and Tuff-R™ GA3000 high
performance thermal insulation in pitched roof between rafter
applications to minimise insulation thickness and give the
following benefits:
Installation guidelines: ventilated
▶ Optional single-layer insulation reduces cutting
accommodate not only the thickness of the Celotex
insulation but also a 50mm ventilated airspace above
the boards.
▶ Make sure there is enough rafter depth to
buildings
▶ Fix battens to the inside face of the rafter so that the
▶ Easy to dryline with plasterboard once
bottom of the batten is 50mm below the sarking felt.
installed
▶ Dimensionally stable
Installation guidelines: unventilated
▶ No loss of internal headroom
▶ Install the breather membrane over rafters by either
▶ Ideal for loft conversions/room in roof applications
Insulation Between Rafters Calculations
Ventilated System with sarking felt & tiles
Rafter
47/215
47/200
47/180
47/170
Centres
400
600
400
600
Ventilation
50
50
50
50
Insulation
165
150
130
120
U-Value
Vcl/Pboard
12.5
12.5
12.5
12.5
Insulation
140
100
130
100
150
110
U-Value
Vcl/Pboard
12.5
12.5
12.5
12.5
12.5
12.5
W/m2K
0.20
0.20
0.25
0.24
Centres
600
600
600
600
400
400
Low E cavity
10
50
45
75
25
65
Installation guidelines: ventilated &
unventilated
▶ Measure the space to be filled between the inside
face of the rafter prior to cutting the board.
▶ Cut the Celotex insulation at a slight angle, making
the board width slightly oversized on one surface to
achieve a ‘friction fit’.
Unventilated System with breather membrane & tiles
Rafter
47/150
47/150
47/175
47/175
47/175
47/175
fixing battens to the sides of the rafters and allowing
the membrane to sag between the rafters, or by fixing
counter battens over the membrane, leaving the entire
rafter depth to be filled with insulation. All details are
to be in accordance with the membrane
manufacturer’s recommendations.
W/m2K
0.20
0.24
0.20
0.24
0.20
0.24
▶ Push the boards into the void between the rafters
until they are tight up to the battens or the membrane,
ensuring that lateral joints are closely butted.
▶ Cut and fit the second layer as above and push
tightly up to the underside of the first layer.
▶ Tightly fit to ridge plate and carry over or tightly butt
wall plate at eaves.
▶ A vapour control layer should be installed to the
underside of the rafters. A separate polythene sheet is
recommended for high humidity areas such as
kitchens or bathrooms.
▶ Complete the internal finish with plasterboard or
other suitable sheet material.
20
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21
Use Celotex Tuff-R™ GA3000 high performance thermal insulation
in pitched roof between and under rafter applications to
▶ Ideal for use with shallow rafters
buildings
▶ Minimised additional loading to the structure
▶ Dimensionally stable
▶ Ideal for loft conversions/room in roof
Example U-value calculation: ventilated in-between & under rafters
Cold Pitch Roof
Outside surface
Tiling inc batten space
Sarking Felt
Ventilated cavity
Celotex between rafter @ 400 Ctrs
Variable Layer [ for below rafter ]
Low E cavity batten air space
Vapour control layer
Plasterboard
Inside surface
See Note 1
100 mm deep rafters 125 mm deep rafters 150 mm deep rafters
Thickness
Thickness
Thickness
(mm)
(mm)
(mm)
50
50
50
GA3050 (11.7% brg) GA3075 (11.7% brg) GA3100 (11.7% brg)
See below
See below
See below
25 (11.7% brg)
25 (11.7% brg)
25 (11.7% brg)
12.5
12.5
12.5
-
Insulation between and under rafters
applications
▶ Upgrade existing ceilings to current standards
How to use table
Celotex
Product
GA3060
GA3050
TB3045
TB3040
TB3035
TB3030
TB3025
TB3020
TB3012
1. Select rafter size
2. Note insulation between rafter as stated
3. Determine U-value
4. Read left to establish required thickness
of insulation to be used in the variable layer
Example U-value calculation: unvented in-between & under rafters
100 mm deep rafters 125 mm deep rafters 150 mm deep rafters
Thickness
Thickness
Thickness
(mm)
(mm)
(mm)
20
30
30
GA3080 (11.7% brg) GA3100 (11.7% brg)
XR3120 (11.7% brg)
See below
See below
See below
12.5
12.5
12.5
-
Cold Pitch Roof
Outside surface
Tiling inc batten space
Breather Membrane
Low E cavity
Celotex between rafter @ 400 Ctrs
Variable Layer [ for below rafter ]
Plasterboard
Inside surface
Variable Layer
Thickness U-value Thickness U-value Thickness U-value
(mm)
(m²K/W)
(mm)
(m²K/W)
(mm)
(m²K/W)
60*
0.20
60*
0.17
60*
0.15
50*
0.22
50*
0.19
50*
0.16
45*
0.23
45
0.21
45
0.18
40*
0.25
40
0.22
40
0.19
35
35
0.24
35
0.20
30
30
0.25
30
0.21
25
25
25
0.22
20
20
20
0.20
12
12
12
Note 1
This thickness of board is required to be fixed using
25mm x 47 battens to allow a suitable construction detail
TB = Celotex T-Break™ TB3000
GA = Celotex Tuff-R™ GA3000
XR = Celotex Extra-R™ XR3000
Low E = Low emissivity
Installation guidelines: ventilated
▶ Cut the Celotex insulation at a slight angle, making the
▶ Make sure there is enough rafter depth to accommodate
board width slightly oversized on one surface to achieve a
‘friction fit’.
not only the thickness of the Celotex insulation but also a
50mm ventilated airspace above the boards.
▶ Fix battens to the inside face of the rafter so that the
bottom of the batten is 50mm below the sarking felt.
How to use table
1. Select rafter size
2. Note insulation between rafter as stated
Celotex
Product
TB3045
TB3040
TB3035
TB3030
TB3025
TB3020
TB3012
Variable Layer
(mm)
(m²K/W)
(mm)
(m²K/W)
(mm)
(m²K/W)
45
0.19
45
0.17
45
0.15
40
0.20
40
0.18
40
0.16
35
0.21
35
0.18
35
0.17
30
0.22
30
0.19
30
0.17
25
0.23
25
0.20
25
0.18
20
0.24
20
0.21
20
0.19
12
12
0.23
12
0.20
▶ Install the breather membrane over rafters by either
fixing battens to the sides of the rafters and allowing the
membrane to sag between the rafters, or by fixing counter
battens over the membrane, leaving the entire rafter depth
to be filled with insulation. All details are to be in
accordance with the membrane manufacturer’s
recommendations.
Installation guidelines: ventilated & unventilated
22
Installation guidelines: unventilated
▶ Measure the space to be filled between the inside face of
▶ Push the boards into the void between the rafters until
they are tight up to the battens or the membrane, ensuring
that lateral joints are closely butted. Secure the second layer
of Celotex insulation to the underside of the rafters with
broad-headed clout nails. Joints between boards must be
tightly butted.
▶ Seal the board joints with a self-adhesive aluminium foil
tape. Vapour seal all perimeter abutments using sealant.
▶ Nail or screw plasterboard or other lining through the
insulation to the rafter, ensuring that the length of the
fasteners is adequate to secure the plasterboard lining.
▶ Alternatively, fit softwood battens to the underside of the
rafters and fix the plasterboard directly to the batten.This
also provides a void for lighting cables/conduit.
the rafter prior to cutting the board.
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23
24
Celotex Energy-Lok™ EL3 is a purpose designed
insulation board for use in built-up flat roofing
applications, including hot-applied bituminous
and mastic asphalt waterproofing systems and
fully adhered single-ply membranes. EnergyLok™ features a perforated face for use in
bitumen-based built-up applications whilst the
coated glass tissue reverse facer is suitable for
fully adhered single-ply applications.
Celotex Tempchek™ Deck TD3000 is designed as
a combined deck and insulation board for flat
roofs, supported by timber joists. This creates a
‘warm roof’ construction, eliminating the need
for insulation between the joists, and avoids the
difficulty of providing ventilation through the
roof void. All flat roofs should be laid to falls to
ensure proper drainage without ponding. With
the exception of fixing, the installation of a
waterproofing system incorporating Celotex
Tempchek™ Deck TD3000 may be treated in the
same way as a normal plywood-decked roof.
Depending on age, many existing timber joisted
flat roofs incorporate little or no insulation.
However, they can be effectively upgraded to
current building regulation insulation
requirements without the need to remove the
existing weatherproofing covering. This is
especially relevant where buildings are being
renovated or converted for new uses.
Depending on age, many existing timber joisted
flat roofs incorporate little or no insulation.
However, they can be effectively upgraded to
current building regulation insulation
requirements without the need to remove the
existing weatherproofing covering. This is
especially relevant where buildings are being
renovated or converted for new uses.
Celotex rigid PIR insulation board can be
installed between and under joists in both
existing and new constructions. The position of
the insulation will create a ‘cold roof’
construction and a minimum 50mm ventilated
air space must be provided between the deck
and the ‘cold’ side of the insulation in order to
minimise the risk of condensation formation.
Celotex rigid PIR insulation board can be
installed between joists in both existing and new
constructions. The position of the insulation will
create a ‘cold roof’ construction and a minimum
50mm ventilated air space must be provided
between the deck and the ‘cold’ side of the
insulation in order to minimise the risk of
condensation formation.
If the existing roof deck is not laid to falls and is
prone to ponding, consideration must be given
to replacing the deck.
If the existing roof deck is not laid to falls and is
prone to ponding, consideration must be given
to replacing the deck.
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25
When designing a flat roof using Celotex
Energy-Lok™ EL3 boards, three basic
principles apply:
3.Provide adequate protection for both insulation
and waterproofing if significant foot traffic is
expected either during or after the completion of
the roof.
Metal Deck
Cold-applied systems
For single-ply membranes, the VCL should be
either polythene or reinforced aluminium foil. The
VCL should be loose-laid immediately prior to
installation of the roof board and detailed at
edges and abutments as previously described.
The VCL should be sealed and taped to the top
surface of the board.
EL3/50
EL3/80
EL3/90
EL3/95
EL3/100
EL3/110
EL3/120
EL3/140
EL3/150
Fully
Bonded
0.50
0.31
0.28
0.26
0.25
0.23
0.20
0.17
0.16
Mech
Fixed
0.52
0.33
0.30
0.29
0.28
0.25
0.23
0.20
0.19
Concrete Deck
Based on 250mm concrete
Fully
Bonded
0.47
0.30
0.27
0.25
0.24
0.22
0.20
0.17
0.16
Mech
Fixed
0.49
0.32
0.29
0.28
0.27
0.25
0.22
0.19
0.18
Timber Deck
Fully
Bonded
0.42
0.28
0.25
0.24
0.23
0.21
0.19
0.16
0.15
Mech
Fixed
0.45
0.31
0.28
0.27
0.26
0.24
0.22
0.20
0.19
Hot bitumen bonding
Hot-applied systems
The felt vapour control layer (VCL) should be fully
sealed at all laps prior to applying the insulation.
At perimeters and abutments the VCL should be
turned up around the insulation board edges and
a flap of approximately 300mm should be
bonded to the top surface of the insulation board.
The VCL should be fully bonded to concrete decks
using hot bitumen adhesive, strip-bonded to the
ribs of metal decks and partially bonded to timber
decks. On timber decks the VCL may be nailed to
the deck, but laps should be sealed with the
appropriate adhesive.
26
Different types of weathering systems require
different installation instructions and guidelines.
Advice on the installation of these weathering
systems should be sought from the manufacturer
or provider of the weathering system type.
Typical U-values in conjunction with single ply membrane
U-value (W/m2K)
1.Design to a fall of 1:80, 1:60 or 1:40 as
appropriate to the weathering system, type of
deck and construction tolerances.
2.Have due regard for the use and design of the
building and the need to ensure that the design
will not allow a build up of moisture below the
waterproofing membrane.
Installation of weathering systems
corrugations. When mechanical fasteners are
utilised, they should be selected to suit the type of
deck used. A plate washer with a surface area of
not less than 45cm² must be used with each
fastener, with no less than four fasteners used per
board. Fasteners should be installed between 50 –
150mm from the edges and corners of the board.
Use Celotex Energy-Lok™ EL3 high performance
insulation in built-up flat roofing applications,
including hot-applied bituminous and mastic
asphalt waterproofing systems and fully
adhered single-ply membranes.
When used on metal decks, Celotex Energy-Lok™
EL3 boards should be laid with the perforated
facer uppermost and the long sides at right
angles to the corrugations and bonded in a full
mop of hot bitumen to the VCL. Torch-on
technique is suitable only when there is no direct
contact between the flame and the board.
Energy-Lok™ is not suitable for use with the
standard torch-on technique.
Mechanical fastening
The boards should be laid, with all joints tightly
butted together, over the VCL and then
mechanically secured through to the deck. When
used on metal decks, these roof boards should be
laid with the long sides at right angles to the
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27
▶ Three-in-one product to provide
deck, vapour control layer (VCL) and
insulation
▶ Provides reliable long term energy
savings for buildings
▶ Ensure that joist spacing is at no more than 600mm
▶ Always use a Type 3G felt to BS 747 as a vapour
centres and that the dimension of the joist is sufficient
to span and accept additional loads. If asphalt
weathering is to be used, joists should be at no more
than 400mm centres.
diffusion first layer when using BUR weathering
systems.
▶ Install the insulation boards, ensuring that the long
insulation and the waterproofing, if significant foot
traffic is anticipated either during or after installation.
edges are parallel to the line of the joists. 50 x 50mm
cross noggings should be inserted between joists to
support the short edges of the boards.
Falls
▶ Where boards butt together, bed onto twin beads of
▶ Ideal for use in occasionally trafficked applications
vapour sealant wide enough to accommodate this
arrangement. This completes the vapour control layer
(VCL) when combined with each board’s foil facings.
▶ Warm roof construction due to over joist installation
▶ Rapidly installed and weatherproofed
and stagger board joints. Leave a gap of approximately
2mm between boards and ensure a minimum 20mm
bearing on joists and noggings.
▶ Fix Celotex Tempchek™ Deck TD3000 with
Tempchek™ Deck
Built-up roofing
Variable layer
Cavity (low emissivity) between joists
Gyproc Wallboard
Thickness
(mm)
12.0
150.0
12.5
-
Thermal
Conductivity
(W/mK)
0.133
0.160
-
Thermal
Resistance
(m²K/W)
0.040
0.090
0.454
0.070
0.100
Themal
Conductivity
(W/mK)
-
U-value
Bridge
Details
11.7% Timber (150.0mm)
-
corrosion-proof Suretwist Composite Panel helical
fasteners at a frequency to suit the design wind load.
Refer to BS 6399-2:1997 Code of practice for wind
loads. As a guide, 16 fasteners per board will resist a
wind load of 2.22 KN/m2 based on a design load of 0.4
KN per fastener.
▶ Ensure that fixings are no less than 10mm in from
the board edge or 50mm from each corner. They
should be equally spaced along the supporting joists.
Fixings should be long enough to penetrate at least
35mm into the supporting timber.
▶ Stagger opposing fixings where two board edges
share the same joist or noggin.
Variable Layers
Celotex Tempchek™ TD3126
Thickness
(mm)
126.0
116.0
106.0
96.0
86.0
81.0
76.0
The structure should be designed so that the finished
roof has a continuous, smooth and even slope towards
the rainwater outlet or gutter. The minimum fall should
be 1 in 80 to avoid ponding water.
▶ Lay the boards with the plywood side uppermost
▶ Accepts a wide variety of weathering systems
Construction
▶ Temporary protection must be provided for both the
(m²K/W)
0.18
0.20
0.21
0.23
0.25
0.26
0.28
▶ Provide a complete insulation envelope by
extending the wall insulation board up to the
underside of the roof deck.
▶ Provide a soffit or ceiling below the joists, as the
surface of the product is not designed to be used as a
decorative internal finish.
Deck stability
Celotex Tempchek™ Deck TD3000 incorporates
exterior grade WBP plywood to BS 1203, laminated to
the surface. This gives the product excellent strength.
Boards can span up to 600mm joist centres to provide
a suitable substrate for a variety of weathering
systems.
Use Celotex Tempchek™ Deck TD3000 to combine high
performance thermal insulation with 5.5mm WBP ply
for use in flat roof deck applications to minimise
insulation thickness and give the following
benefits:
Additional installation guidelines for
balconies
Before commencement of works, consult with a
structural engineer to ensure that the whole structure
is adequate to take the additional loads of a balcony.
Celotex Tempchek™ Deck TD3000 has a built-in VCL
due to the foil facers but this is discontinuous at the
board joints. In some applications no further attention
to moisture control may be necessary. Celotex would
generally recommend the application of a vapour
sealant between the tops of the boards at all edges.
This is essential in areas of potentially high humidity.
▶ Ensure that the plywood is completely dry before
any weathering system is applied.
U-value
28
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29
▶ Make sure that there is enough joist depth to
insulation, but also a 50mm ventilated airspace above
the boards.
▶ Optional single-layer insulation
▶ Fix battens to the inside face of the joists so that the
reduces cutting
bottom of the batten is 50mm below the top of the
joist.
face of the joists prior to cutting the board.
▶ Easy installation to use in existing roofs with no
▶ The patented Celotex insulation clip is designed to
loss of internal headroom
▶ No need to remove existing weatherproof covering
allow insulation boards to be installed between timber
joists quickly and without nails or screws.
▶ Ideal for renovation/conversion projects
▶ Fit the clips at one metre maximum centres along
When updating an existing ceiling, the Celotex
insulation can be fitted directly underneath the ceiling,
providing there is no vapour check layer present such
as gloss paint or foil backed plasterboard.
Always ensure that there is a 50mm minimum
ventilation gap above any original insulation.
Ventilation must be provided above an insulated
ceiling directly though the cold void.
Failure to do so could result in serious condensation
problems that may lead to decay and possible failure.
the edge of the insulation (as described on page 13).
▶ Ventilated cold roof construction
▶ Push the boards into the void between the joists
until they are tight up to the underside of the stop
battens, ensuring the lateral joints are tightly butted.
Use Celotex Extra-R™ XR3000 and Celotex Tuff-R™
GA3000 high performance thermal insulation in flat
roof between joist applications to minimise
insulation thickness and give the following
benefits:
▶ A vapour control layer (VCL) should be installed to
Example U-value calculation – flat roof / cold flat roof with 215 joists
Construction
Thickness
(mm)
12.000
19.000
50.0
12.5
-
Built-up roofing
Plywood
Ventilated Cavity
Variable layer
Gyproc Wallboard
Thickness
Thermal
Thermal
Conductivity Resistance
(W/mK)
(m²K/W)
0.100
0.000
0.000
0.000
0.000
0.160
0.070
0.100
Bridge
Details
▶ Complete the internal finish with plasterboard or
other suitable sheet material screwed or nailed to the
joists.
dU”
Bridge
Details
Celotex Extra-R™ XR3165 between joists @ 400 ctrs
Themal
Conductivity
(W/mK)
0.023
U-value
(mm)
165.0
(m²K/W)
0.20
0.010
150.0
0.023
0.22
0.010
140.0
0.023
0.24
0.010
130.0
0.023
0.25
0.010
11.8% timber (165.0mm)
delta U"=0.01
11.8% timber (150.0mm)
delta U"=0.01
11.8% timber (140.0mm)
delta U"=0.01
11.8% timber (130.0mm)
delta U"=0.01
Variable Layers
the underside of the joists. A separate polythene sheet
is recommended for high humidity areas such as
kitchens and bathrooms.
U-value
30
T: 0901 996 0100*
www.celotex.co.uk
31
▶ Make sure that there is enough joist depth to
insulation, but also a 50mm ventilated airspace above
the boards.
▶ A perfect solution to upgrade older
▶ Fix battens to the inside face of the joists so that the
buildings
bottom of the batten is 50mm below the top of the
joist.
face of the joists prior to cutting the board.
▶ No need to remove existing weatherproof
covering
Composite systems can be used to combine Celotex
insulation under joist lining with a quilt type insulant
between the joists which will provide acoustic, as well
as thermal insulation.
This option is particularly useful when upgrading to
modern acoustic insulation standards.
When updating an existing ceiling, the Celotex
insulation can be fitted directly underneath the ceiling,
providing there is no vapour check layer present such
as gloss paint or foil backed plasterboard.
▶ Ventilated cold roof construction
Always ensure that there is a 50mm minimum
ventilation gap above any original insulation.
▶ The ideal renovation/conversion solution
▶ Fit the clips at one metre maximum centres along
Ventilation must be provided above an insulated
ceiling directly though the cold void.
the edge of the insulation (as described on page 13).
▶ Easy to minimise any loss of internal headroom
▶ Push the boards into the void between the joists
until they are tight up to the underside of the stop
battens, ensuring the lateral joints are tightly butted.
Failure to do so could result in serious condensation
problems that may lead to decay and possible failure.
Use Celotex Extra-R™ XR3000 and T-Break™ TB3000
high performance thermal insulation in flat roof
between and under joist applications to
minimise insulation thickness and give the
following benefits:
▶ Secure the second layer of Celotex insulation to the
under-side of the joists with broad-headed clout nails.
Example U-value calculation: in between & under joists
Cold Flat Roof
Outside surface
Weather proofing system
Plywood
Ventilated cavity
Celotex between joist @ 400 Ctrs
Variable Layer [ for below joist ]
Low E cavity batten air space
Plasterboard
Inside surface
See Note 1
How to use table
1. Select joist size
2. Note insulation between joist as stated
32
Celotex
Product
GA3050
TB3045
TB3040
TB3035
TB3030
TB3025
TB3020
TB3012
125 mm deep joist
Thickness
(mm)
n/a
19
50
GA3075 (11.7% brg)
See below
25 (11.7% brg)
12.5
-
150 mm deep joist
Thickness
(mm)
n/a
19
50
GA3100 (11.7% brg)
See below
25 (11.7% brg)
12.5
-
175mm deep joist
Thickness
(mm)
n/a
19
50
XR3120 (11.7% brg)
See below
25 (11.7% brg)
12.5
-
▶ Joints between boards must be tightly butted and
sealed with a self-adhesive aluminium foil tape to
create a vapour seal.
▶ Clearly mark rafter-lines on the board face, using a
spirit based felt-tip marker.
▶ Nail or screw plasterboard or other lining through
the insulation to the joist.
Variable Layer
(mm)
(m²K/W)
(mm)
(m²K/W)
(mm)
(m²K/W)
50*
0.19
50*
0.16
50*
0.15
45
0.21
45
0.18
45
0.17
40
0.23
40
0.19
40
0.17
35
0.24
35
0.20
35
0.18
30
0.25
30
0.21
30
0.19
25
n/a
25
0.22
25
0.20
20
n/a
20
0.23
20
0.21
12
n/a
12
n/a
12
0.22
Note 1
This thickness of board is required to be fixed using
25mm x 47 battens to allow a suitable construction detail
T: 0901 996 0100*
www.celotex.co.uk
33
For most of the past century, external masonry
walls have been predominantly of cavity
construction. A cavity provides an effective
barrier to rain penetration and also adds to the
thermal resistance of the wall.
Modern energy conservation requirements
demand added thermal insulation in external
walls, and the cavity offers the most obvious
location for the insulation. However, full cavity fill
may reintroduce the risk of moisture penetration
and many designers, especially when considering
exposed sites, prefer to specify partial-fill
insulation.
For partial-fill design to achieve high standards of
insulation without a massive increase in the width
of the cavity and of the overall wall thickness,
highly efficient insulation must be used.
Solid masonry walls
Internal Insulation Solutions
Many older properties are constructed with solid
masonry walls which provide poor levels of
thermal insulation. These walls can be
successfully insulated by incorporating Celotex
insulation as part of an internal lining system or
an external render system.
The internal lining system creates internal wall
34
surfaces with low thermal mass. These will rapidly
respond to changes in heat inputs and this
system may be beneficial where a building or
room is only occasionally heated.
External Insulation Solutions
The external render system creates internal wall
surfaces with a high thermal mass. These will
respond relatively slowly to changes in heat input
and this system may be preferred for buildings
with continuous occupation.
In both systems, the low thermal conductivity of
Celotex insulation permits the upgrading of older
buildings to current insulation standards with
minimal increase in wall thickness.
There are two solutions for timber frame wall lining.
The first utilises the low lambda values of Celotex
Tuff-R™ GA3000 and Extra-R™ XR3000 between
the studs, followed by an internal lining of
Celotex T-Break™ TB3000 over the studs. This
solution provides for the thinnest build-up with
better thermal insulation.
The second option is to use mineral wool batts
fitted between the studs, followed by an internal
lining of Celotex T-Break™ TB3000 over the studs.
This solution gives a thicker build-up but offers
improved acoustic insulation.
T: 0901 996 0100*
The recent growth in Modern Methods of
Construction (MMC) has seen an increase in
popularity of timber framed buildings –
especially in residential developments where
offsite prefabrication of timber framed structures
allow for rapid, accurate construction on site.
Traditionally, the market for sheathing in the UK
has focused on timber frames. However, the
recent growth in Modern Methods of
Construction (MMC) has seen an increase in
popularity of lightweight steel framed buildings
for both commercial and residential
developments where offsite prefabrication of
steel framed structures allow for rapid, accurate
construction on site.
It is now widely recognised that, in highly
insulated framed structures, the thermal bridging
effect of the frame itself becomes significant.
Therefore as demand for higher standards of
insulation grows, the space between the studs
becomes the limiting factor and the frame itself
acts as a thermal bridge. This means that the cost
of increasing frame size to allow more insulation
to be added is disproportionate to the
improvement achieved.
To ensure that interstitial condensation won’t
pose a problem in your proposed design, the
Celotex Technical Services Advisory team can
provide a condensation risk analysis. For further
details, call 0901 996 0100* or e-mail
technical@celotex.co.uk. Alternatively, your
designer can undertake an independent
assessment by following the procedures set out
in BS 5250: 1989 (1995) (Code of practice for the
control of condensation in homes).
It is now widely recognised that, in highly
insulated framed structures, the thermal bridging
effect of the frame itself becomes significant.
Therefore as demand for higher standards of
insulation grows, the space between the studs
becomes the limiting factor and the frame itself
acts as a thermal bridge. This means that the cost
of increasing frame size to allow more insulation
to be added is disproportionate to the
improvement achieved.
To ensure that interstitial condensation won’t
pose a problem in your proposed design, the
Celotex Technical Services Advisory team can
provide a condensation risk analysis. For further
details, call 0901 996 0100* or e-mail
technical@celotex.co.uk. Alternatively, your
designer can undertake an independent
assessment by following the procedures set out
in BS 5250: 1989 (1995) (Code of practice for the
control of condensation in homes).
www.celotex.co.uk
35
Use Celotex Tuff-R™ CW3000 high performance thermal
insulation in cavity wall applications to minimise insulation
thickness and give the following benefits:
▶ Easy to fit between wall ties using cavity tie
clips for retention
buildings
▶ Excellent dimensional stability
▶ Conveniently sized boards for installation between
cavity wall ties
▶ The wall ties used must be suitable for the structural
requirements and incorporate a retaining clip to
ensure that the insulation is held permanently in place.
Normally the insulation is fitted against the inner leaf
of the wall but where the construction requires it, the
insulation may be installed against the outer leaf.
▶ BBA-approved wall ties and clips should be used
Gable walls
At gable walls it is recommended that Celotex Tuff-R™
CW3000 is taken up to the underside of the roof
verges. In cold roof constructions, the product should
extend at least 250mm above the ceiling insulation.
The top edge of the insulation should be protected
with a cavity tray.
wherever possible. The advice of wall tie manufacturers
should be followed, but Celotex does not consider
butterfly ties to be suitable for use with partial-fill
cavity insulation.
▶ The first row of board-retaining wall ties should be
installed at least one course below the damp proof
course (DPC) and positioned at maximum 600mm
centres horizontally, to provide a minimum support of
2 ties per 1200mm board.
▶ Easy to cut boards to fit
installed at 450mm centres vertically and maximum
900mm centres horizontally. Where the cavity width is
greater than 80mm, or where required for structural
purposes, it may be necessary to install ties at closer
centres.
▶ Always ensure that each full or cut board is retained
by no fewer than three ties around its perimeter.
▶ Fit the boards between the wall ties, and secure in
place with a retaining clip on each tie. Ensure that
horizontal and vertical joints are tightly butted to
minimise heat loss.
Cavity fire barriers
Cavity barriers are not required in any walls that
comply with Approved Document B3 diagram 32, but
the cavity must be closed at the top and around any
openings.
Celotex Tuff-R™ CW3000, being a non-melting
thermoset material, may pass through cavity barriers
so that a thermal bridge is avoided.
▶ The second and subsequent rows of ties should be
▶ At openings such as doors and windows, use a
proprietary insulated cavity closer.
Cavity obstructions
▶ Where necessary, cut the boards to size, using a
Unavoidable projections into the cavity, such as floor
edge beams and steel columns, need careful detailing
and may require a horizontal cavity tray.
sharp knife and straight edge.
▶ Where the cavity is closed at or below DPC level by a
methane barrier membrane, use mechanical fixings to
secure the board to the blockwork above the DPC.
Avoid puncturing the gas barrier membrane.
▶ At internal and external angles, ensure that the
thickness of the board continues around the angle and
that sufficient wall ties are used.
36
T: 0901 996 0100*
To comply with the requirement of the National House
Building Council (NHBC), Zurich Building Guarantee or
Housing Association Property Mutual (HAPM), a
minimum 50mm clear residual cavity should be
provided in any exposed zone.
For buildings up to 12m high a minimum clear cavity
width of 25mm may be acceptable, subject to
exposure. The 25mm minimum constructed residual
cavity width must be clear of all obstructions.
www.celotex.co.uk
37
Blockwork comparison list
CW3040
CW3040
CW3050
CW3050
CW3055
CW3060
CW3065
CW3065
Besblock
Insulite Solid
0.34
CW3035
CW3045
CW3055
CW3060
Celcon
Solar
Standard
Hi-Seven
0.11
0.15
0.19
CW3025
CW3030
CW3030
CW3035
CW3040
CW3045
CW3045
CW3050
CW3050
CW3050
CW3055
CW3060
Forticrete
Lightweight
Dense
0.42 - 0.59
0.93 - 1.13
CW3040
CW3040
CW3050
CW3050
CW3060
CW3060
CW3065
CW3065
Hanson
Ultralite
Superlite
Fenlite
Evalast
0.29
0.40
0.48
1.32
CW3035
CW3040
CW3040
CW3040
CW3045
CW3050
CW3050
CW3050
CW3055
CW3055
CW3055
CW3060
CW3060
CW3065
CW3065
CW3065
Interfuse
Optilyte
Interlyte
Intercrete
0.20
0.47
1.13
CW3035
CW3040
CW3040
CW3045
CW3050
CW3050
CW3050
CW3055
CW3060
CW3060
CW3065
CW3065
LAMBDA explained
Lignacite
SP
Standard
0.60
0.69
CW3040
CW3040
CW3050
CW3050
CW3060
CW3060
CW3065
CW3065
Greek symbol is used to
λ This
represent the Thermal
Masterblock
Pumalite
Lightweight
Dense
0.44
0.59
1.06
CW3040
CW3040
CW3040
CW3050
CW3050
CW3050
CW3055
CW3060
CW3060
CW3065
CW3065
CW3065
Mona Precast
Fibotherm
Monalight 100S
Monacrete 100
GPI
Monacrete 100S
0.25
0.50
0.59
0.51
1.13
CW3035
CW3040
CW3040
CW3040
CW3040
CW3045
CW3050
CW3050
CW3050
CW3050
CW3055
CW3060
CW3060
CW3060
CW3060
CW3060
CW3065
CW3065
CW3065
CW3065
Plasmor
Fibolite
Aglite
Stranlite
Plascon
0.27
0.32
0.46
1.06
CW3035
CW3035
CW3040
CW3040
CW3045
CW3045
CW3050
CW3050
CW3055
CW3055
CW3055
CW3060
CW3060
CW3060
CW3065
CW3065
RMC
Readyblock 1100
Readyblock 1400
Readyblock Dense
0.34
0.59
1.13
CW3035
CW3040
CW3040
CW3045
CW3050
CW3050
CW3055
CW3060
CW3060
CW3060
CW3065
CW3065
Stock Blocks
Ultralite
Insulite
Lyta
Dense Concrete
0.25
0.40
0.56
0.99 - 1.25
CW3035
CW3040
CW3040
CW3040
CW3045
CW3050
CW3050
CW3050
CW3055
CW3055
CW3060
CW3060
CW3060
CW3065
CW3065
CW3065
Thermalite
Turbo
Shield
Hi-Strength 7
Hi-Strength 10
0.11
0.15
0.19
0.20
CW3025
CW3030
CW3030
CW3035
CW3035
CW3040
CW3045
CW3045
CW3045
CW3050
CW3050
CW3050
CW3050
CW3055
CW3060
CW3060
Supabloc
Supabloc 4
Supabloc 7
Toplite GTI
Toplite Standard
Toplite 7
Topcrete Fair Face
Topcrete Dense
Hemelite 3-5
Hemelite 7
Hemelite 10
0.11
0.16
0.17
0.11
0.15
0.19
0.99
1.28
0.45
0.47
0.49
CW3025
CW3030
CW3030
CW3025
CW3030
CW3030
CW3040
CW3040
CW3040
CW3040
CW3040
CW3035
CW3040
CW3040
CW3035
CW3040
CW3045
CW3050
CW3050
CW3050
CW3050
CW3050
CW3045
CW3050
CW3050
CW3045
CW3050
CW3050
CW3060
CW3060
CW3055
CW3055
CW3055
CW3050
CW3055
CW3055
CW3050
CW3055
CW3060
CW3065
CW3065
CW3065
CW3065
CW3065
In the past, buildings failed to achieve
their U-values. This was due to thermal
bridging that had not previously been
taken into account. Mortar joints
between insulating concrete blocks are
a significant example, but timber in
stud framing is another less well
known form.
Conductivity of a material, measured in
Watts per metre degrees Kelvin
(W/mK). The block values quoted are
taken from the manufacturers’
literature or by direct consultation with
their technical departments. The
lambda value for the Celotex Tuff-R™
CW3000 range is 0.023 W/mK (fully
aged), as confirmed on the product’s
CE marked labels.
Reading the table
All of the following recommendations
are based on a wall construction of
103mm brickwork, a 50mm clear cavity,
Celotex cavity wall insulation to the
thickness specified, a block inner leaf
thickness of 100mm, finished on the
inside with a lightweight plaster.
Simply select the type of block that
you wish to use and read across to the
minimum thickness of Celotex Tuff-R™
CW3000 needed for the desired
U-value.
NB. Always install with the unprinted
foil surface facing the air cavity.
Topblock
T: 0901 996 0100*
Cavity wall ready reckoner
Construction 103mm brick or 100mm block | cavity | Celotex insulation | 103mm brick or 100mm block | internal finish
Internal finish Green = Lightweight plaster
Red = Plasterboard on plaster dabs
Example
For a U-value of 0.35 W/m2K using Hanson Fenlite outer leaf (λ = 0.48) with Celcon Standard inner leaf (λ = 0.15)
Outer leaf (left column) go to the next highest value = 0.50 and go along the row to Inner leaf 0.15 column.
You will need Celotex T-Break™ TB3030 with lightweight plaster or Celotex T-Break™ TB3025 with plasterboard on dabs.
Thickness of Celotex insulation for a U-value of 0.35 W/m2K
λ
Brick 0.77
Block 1.13
0.90
0.60
0.50
0.40
0.30
0.20
0.15
0.11
Brick
Block
0.77
40 40
40 40
40 40
40 35
40 35
40 35
35 35
35 30
30 25
25 25
1.13
40 40
40 40
40 40
40 35
40 35
40 35
35 35
35 30
30 30
25 25
Inner leaf
0.90
40 40
40 40
40 40
40 35
40 35
35 35
35 35
35 30
30 25
25 25
0.60
40 35
40 35
40 35
40 35
35 35
35 35
35 30
30 30
30 25
25 20
0.50
40 35
40 35
40 35
35 35
35 35
35 35
35 30
30 30
30 25
25 20
0.40
40 35
40 35
35 35
35 35
35 35
35 30
35 30
30 25
25 25
25 20
0.30
35 35
35 35
35 35
35 30
35 30
35 30
30 30
30 25
25 25
20 20
0.20
35 30
35 30
35 30
30 30
30 30
30 25
30 25
25 20
20 20
20 20
0.15
30 25
30 30
30 25
30 25
30 25
25 25
25 25
20 20
20 20
20 12
0.11
25 25
25 25
25 25
25 20
25 20
25 20
20 20
20 20
20 12
12 12
0.30
45 45
45 45
45 45
45 45
45 40
45 40
40 40
40 35
35 35
30 30
0.20
45 40
45 40
45 40
40 40
40 40
40 40
40 35
35 35
35 30
30 25
0.15
40 40
40 40
40 40
40 35
40 35
35 35
35 35
35 30
30 25
25 25
0.11
35 35
35 35
35 35
35 35
35 30
35 30
30 30
30 25
25 25
20 20
0.30
55 50
55 55
55 50
55 50
55 50
50 50
50 50
45 45
45 40
40 40
0.20
50 50
50 50
50 50
50 50
50 45
50 45
45 45
45 40
40 40
35 35
0.15
50 45
50 45
50 45
45 45
45 45
45 45
45 40
40 40
40 35
35 30
0.11
45 40
45 45
45 40
45 40
45 40
40 40
40 40
35 35
35 30
30 25
λ
Brick 0.77
Block 1.13
0.90
0.60
0.50
0.40
0.30
0.20
0.15
0.11
Brick
Block
0.77
50 50
50 50
50 50
50 45
50 45
50 45
45 45
45 40
40 40
35 35
1.13
50 50
50 50
50 50
50 50
50 45
50 45
45 45
45 40
40 40
35 35
Inner leaf
0.90
50 50
50 50
50 50
50 45
50 45
50 45
45 45
45 40
40 40
35 35
0.60
50 45
50 50
50 45
50 45
50 45
45 45
45 45
40 40
40 35
35 35
0.50
50 45
50 45
50 45
50 45
45 45
45 45
45 40
40 40
40 35
35 30
0.40
50 45
50 45
50 45
45 45
45 45
45 45
45 40
40 40
35 35
35 30
0.42
1.13
Outer leaf
Lightweight
Dense
Outer leaf
Product code
Block
lambda λ 0.35 W/m2K 0.30 W/m2K 0.27 W/m2K 0.25 W/m2K
Armstrong
Thermal bridging
38
Block
Block
manufacturer name
λ
Brick 0.77
Block 1.13
0.90
0.60
0.50
0.40
0.30
0.20
0.15
0.11
Outer leaf
This table lists known lambda values of
major blockwork manufacturers’
products. Check with your supplier for
the latest information.
Brick
Block
0.77
60 55
60 55
60 55
60 55
60 55
55 55
55 50
50 50
50 45
45 40
1.13
60 55
60 60
60 55
60 55
60 55
55 55
55 55
50 50
50 45
45 45
Inner leaf
0.90
60 55
60 55
60 55
60 55
55 55
55 55
55 50
50 50
50 45
45 40
0.60
60 55
60 55
60 55
55 55
55 55
55 55
55 50
50 50
45 45
45 40
0.50
60 55
60 55
55 55
55 55
55 55
55 50
55 50
50 45
45 45
45 40
0.40
55 55
55 55
55 55
55 55
55 50
55 50
50 50
50 45
45 45
40 40
www.celotex.co.uk
39
Solid masonry walls
Dry line 215 wall
Internal insulation solutions
Thickness
Construction
Use Celotex Tuff-R™ GA3000 and Celotex T-Break™ TB3000
high performance thermal insulation in solid masonry
wall applications to minimise insulation thickness
and give the following benefits:
(mm)
215.0
25.0
12.5
-
Brick
Variable layer
Cavity (low emissivity) - 25 x 47 battens @ 600 ctrs
Gyproc Wallboard
▶ Reduces heat bridges formed by mortar joints
▶ Ideal where no wall cavity exists
Thickness
Variable Layers
▶ Provides reliable long term energy saving for
buildings
Celotex Tuff-R™ GA3000. Joints taped as VCL
Celotex T-Break™ TB3000. Joints taped as VCL
▶ Provides a vapour control layer (VCL) when
board joints are taped
▶ Particularly suited to refurbishment projects
(mm)
100.0
90.0
80.0
75.0
70.0
65.0
60.0
55.0
50.0
45.0
40.0
Thermal
Conductivity
(W/mK)
0.770
0.160
-
Thermal
Resistance
(m²K/W)
0.040
0.279
0.665
0.070
0.130
Bridge
Details
Themal
Conductivity
(W/mK)
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
U-value
dU”
Bridge
Details
(m²K/W)
0.18
0.20
0.22
0.23
0.24
0.25
0.27
0.29
0.30
0.33
0.35
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
-
17.2% Mortar (215.0mm)
7.8% Timber (25.0mm)
-
Dry line 103 wall
Thickness
Construction
Brick
Variable layer
Cavity (low emissivity) - 25 x 47 battens @ 600 ctrs
Gyproc Wallboard
(mm)
103.0
25.0
12.5
-
Thermal
Conductivity
(W/mK)
0.770
0.160
-
Thermal
Resistance
(m²K/W)
0.040
0.134
0.665
0.070
0.130
Bridge
Details
17.2% Mortar (103.0mm)
7.8% Timber (25.0mm)
-
Installation guidelines for internal lining
systems
▶ Ensure that existing walls are permeable. Strip any
gloss paint or vinyl wallpaper.
Thickness
Variable Layers
(mm)
100.0
90.0
80.0
75.0
70.0
65.0
60.0
55.0
50.0
45.0
Themal
Conductivity
(W/mK)
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
U-value
(m²K/W)
0.19
0.20
0.22
0.24
0.25
0.26
0.28
0.30
0.32
0.34
dU”
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
Bridge
Details
▶ Cut the 1200 x 2400mm Celotex Tuff-R™ GA3000
-
boards to fit the floor-to-ceiling height of the room.
foil surface should face the batten cavity.
40
T: 0901 996 0100*
to provide fixings for linings and grounds for skirtings,
etc. Battens should be minimum 50 x 25mm treated
softwood.
▶ The batten depth must be increased to take account
of the conduit, if cabling is to be located within the
cavity created by the battens.
▶ Use independent horizontal battens for heavy wall-
and bottom of the wall to hold the boards in place.
mounted components. Longer fixings may be
necessary to fit heavy items to the masonry,
independently of the battens.
▶ Seal all board joints to create a vapour control layer
▶ Line window and door reveals with thinner Celotex
(VCL) using an aluminium foil self-adhesive tape.
T-Break™ TB3000 boards to reduce the risk of thermal
bridging. Fix a batten around the edge of the opening
and scribe the board to fit the reveal. Cut the dry lining
to suit and mechanically fix into the masonry reveal
using proprietary fixings. Finish using an angle fillet at
the frame and an angle bead or scrim tape at external
corners.
▶ Fix horizontal battens over the insulation at the top
▶ Add further vertical battens over the insulation at
U-value
▶ Additional battens are required around all openings
appropriate spacing to provide adequate fixings for
the selected lining system. Ensure that a batten
coincides with each lining board joint.
▶ Apply an appropriate sealant around the perimeter
U-value
of the insulation to provide a vapour seal.
www.celotex.co.uk
41
Solid masonry walls
External insulation solutions
Use Celotex Tuff-R™ GA3000 and Celotex T-Break™ TB3000
high performance thermal insulation in solid masonry
wall applications to minimise insulation thickness
and give the following benefits:
Installation guidelines for external render
systems
▶ Reduces heat bridges formed by mortar joints
▶ Large uneven projections should be removed and all
▶ Ideal where no wall cavity exists
holes filled and levelled. Loose material should be
cleaned off to leave a sound dry surface.
▶ Prior to the installation of the Celotex insulation
boards, the substrate must be checked for soundness.
▶ Provides reliable long term energy saving for
Tile hanging, render finish and other cladding types are
all suitable for this application. Advice on the
installation of these cladding systems should be
sought from the manufacturer or provider of the
cladding system.
▶ Downpipes should be temporarily removed and, if
buildings
necessary, relocated after completion of installation.
Lengthening of overflow pipes should be allowed for,
together with extensions to sills.
▶ Particularly suited to refurbishment projects
▶ Starter strip/drip should be located at least one half
brick above the damp proof course and fixed directly
to the substrate with plugs and screws.
foil surface should face the batten cavity.
Construction
Softwood weatherboarding
Cavity (ventilated)
Breather membrane
Variable layer
Brickwork
Plaster, lightweight
Variable Layers
Celotex Tuff-R™ GA3100
Thickness
(mm)
19.0
215.0
13.0
Thickness
(mm)
100.0
90.0
80.0
75.0
70.0
65.0
60.0
55.0
Thermal
Conductivity
(W/mK)
0.770
0.160
-
Thermal
Resistance
(m²K/W)
0.130
0.000
0.000
0.279
0.081
0.130
Bridge
Details
17.2% Mortar (215.0mm)
-
Themal
Conductivity
(W/mK)
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
U-value
dU”
Bridge
Details
(m²K/W)
0.20
0.22
0.24
0.26
0.27
0.29
0.31
0.33
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
-
substrate using proprietary fasteners, which are driven
into pre-drilled holes.
▶ All insulation board joints should be tightly butted
and end joints staggered.
▶ Apply preservative-treated timber battens vertically
over the face of the insulation, secure back to the
underlying masonry.
▶ Fix a breather membrane horizontally to the faces of
the battens with minimum 100mm laps.
▶ The Celotex insulation should be fixed to the
U-value
42
T: 0901 996 0100*
www.celotex.co.uk
43
Use Celotex T-Break™ TB3000 and Celotex Tuff-R™ GA3000 high
performance thermal insulation in timber frame wall applications
to minimise insulation thickness and give the following
benefits:
▶ Make sure all studs and rails are flush, with no
projections, and that services are correctly installed.
▶ Cut Celotex Tuff-R™ GA3000 to tightly fit between all
▶ Offers the thinnest solution available
studs and rails.
buildings
foil surface should face the air cavity.
▶ Low emissivity foil facers give improved thermal
▶ Insert insulation into framing and push back to
insulation with cavity air spaces
plywood sheathing. Fit services into cavity if required.
▶ Provides a vapour control layer when board
▶ Measure the wall height from floor level to
underside of ceiling joists and cut board length to suit,
using a trimming knife.
joints are taped
▶ Reduces thermal bridging through studs and rails
▶ Ensure that the wall insulation is continuous with the
▶ Can be nailed directly to stud framing
floor perimeter insulation.
▶ Dryline directly over insulation
▶ Cut boards for infill panels, using off-cuts where
▶ Provides cavity for services
possible, making sure there are no gaps at wall
abutments.
▶ Tightly butt edges of boards together, making sure
there are no gaps.
▶ Temporarily secure the boards with clout nails at
Construction
Brick
Cavity (low emissivity)
Plywood
Variable layer
Cavity (low emissivity) between studs
Gyproc Wallboard
Thickness
(mm)
103.0
50.0
9.0
20.0
12.5
-
U-value
Bridge
Details
17.2% Mortar (103.0mm)
15% Timber (10.0mm)
-
Celotex Extra-R™ XR3000 between 175 stud
(mm)
150.0
Themal
Conductivity
(W/mK)
0.023
(m²K/W)
0.19
0.000
Celotex Extra-R™ XR3000 between 150 stud
130.0
0.023
0.21
0.000
Celotex Tuff-R™ GA3000 between 125 stud
100.0
0.023
0.26
0.010
Celotex Tuff-R™ GA3000 between 100 stud
80.0
0.023
0.30
0.010
Variable Layers
Thickness
Thermal
Thermal
Conductivity Resistance
(W/mK)
(m²K/W)
0.040
0.770
0.134
0.180
0.170
0.053
0.030
0.665
0.160
0.070
0.130
dU”
Bridge
Details
15.0% Timber
(165.0mm)
15.0% Timber
(140.0mm)
15.0% Timber (110.0mm)
delta U"=0.01
15.0% Timber (90.0mm)
delta U"=0.01
600mm centres. Mark stud lines on board surface as
fixing guides for dry lining.
▶ Always fix back to solid timber, both at stud lines and
at top and bottom rails.
▶ Ensure that all board surfaces are clean and free from
dust and then apply aluminium foil vapour-seal tape to
all joints. Taping the joints of the Celotex insulation
with self adhesive aluminium foil tape provides a good
vapour control layer (VCL) and improves air tightness.
▶ Seal the insulation at all abutments and service
penetrations with a vapour resistant sealant.
▶ Fix plasterboard lining over the Celotex insulation
using plasterboard nails or screws of appropriate
length and joint or skim to the desired finish.
▶ No separate vapour check membrane is required in
this application. Celotex insulation acts as an effective
internal VCL when all joints are sealed.
U-value
44
T: 0901 996 0100*
www.celotex.co.uk
45
Single timber frame wall lining
Celotex offers two solutions for single timber frame wall lining
applications. The first utilises the low lambda values of Celotex
Tuff-R™ GA3000 and Extra-R™ XR3000 between the studs,
followed by an internal lining of Celotex T-Break™ TB3000
over the studs. This solution provides for the thinnest
build-up with the better thermal insulation.
projections, and that services are correctly installed.
▶ Fit mineral wool batts or Celotex insulation between
all studs.
▶ Measure the wall height from floor level to
The second option is to use mineral wool batts
fitted between the studs, followed by an internal
lining of Celotex T-Break™ TB3000 over the studs.
This solution gives a thicker build-up but offers
improved acoustic insulation.
underside of ceiling joists and cut board length to suit,
using a trimming knife.
▶ Ensure that the wall insulation is continuous with the
floor perimeter insulation.
▶ Cut boards for infill panels, using off-cuts where
possible, making sure there are no gaps at wall
abutments.
▶ Tightly butt edges of boards together, making sure
there are no gaps.
▶ Temporarily secure the boards with clout nails at
600mm centres. Mark stud lines on board surface as
fixing guides for dry lining.
Cold Flat Roof
Outside surface
Weather board - Tiles - Rendered - code 4 lead
Ventilated Cavity batten air space
Breather Membrane
Plywood
Celotex between studs @ 400 Ctrs
Low E Cavity between studs @ 400 Ctrs
Variable Layer [ for over studs ]
Plasterboard
Inside surface
How to use table
1. Select construction type
2. Note insulation between
studs as stated
4. Read left to establish required
thickness of insulation to be
used in the variable layer
Celotex
Product
TB3045
TB3040
TB3035
TB3030
TB3025
TB3020
TB3012
Weatherboarding
Thickness
(mm)
any
12
Tile Hung
Thickness
(mm)
any
12
Rendered
Thickness
(mm)
20
n/a
12
Lead Clad
Thickness
(mm)
1.8
n/a
12
GA3065 15.0% brg
GA3060 15.0% brg
GA3065 15.0% brg
GA3070 15.0% brg
35 (15.0% brg)
See below
12.5
-
40 (15.0% brg)
See below
12.5
-
35 (15.0% brg)
See below
12.5
-
35 (15.0% brg)
See below
12.5
-
Variable Layer
Thickness U-value Thickness U-value Thickness U-value Thickness U-value
(mm)
(m²K/W) (mm)
(m²K/W) (mm) (m²K/W)
(mm)
(m²K/W)
45
0.20
45
0.21
45
0.21
45
0.20
40
0.21
40
0.22
40
0.22
40
0.21
35
0.23
35
0.23
35
0.23
35
0.22
30
0.24
30
0.24
30
0.24
30
0.24
25
0.25
25
0.26
25
0.26
25
0.25
20
0.27
20
0.27
20
0.27
20
0.27
12
0.30
12
0.30
12
0.30
12
0.30
▶ Always fix back to solid timber, both at stud lines and
at top and bottom rails.
▶ Ensure that all board surfaces are clean and free from
dust and then apply aluminium foil vapour-seal tape to
all joints.
▶ Seal around all penetrations for electrical outlets and
switch boxes.
▶ Fix plasterboard lining over the Celotex insulation
using plasterboard nails or screws of appropriate
length and joint or skim to the desired finish.
Example U-value calculation: inbetween & under joists
▶ No separate vapour check membrane is required in
this application. Celotex insulation acts as an effective
internal vapour control layer when all joints are sealed.
46
T: 0901 996 0100*
www.celotex.co.uk
47
Use Celotex Tuff-R™ GA3000 high performance insulation in timber
frame wall sheathing applications to minimise insulation
projections.
▶ Eliminates thermal bridging of timber
▶ Fix sheet of Celotex Tuff-R™ GA3000 to the external
sheathing using galvanised clout nails at 400mm
centres in the centre of the board and at 300mm
centres of the board and at 300mm centres around the
perimeter.
buildings
▶ Sheathing encapsulates the timber frame
▶ No threat of interstitial condensation
▶ Care must be taken to align the fixings with
underlying studs, sole plates and head rails.
▶ Voids between studs free for services
Gable walls
At gable walls, it is recommended that the insulation
be taken up to the underside of the roof verges.
However, if a cold roof construction is intended, the
cavity insulation should extend at least 250mm above
the ceiling. The top edge of the insulation should be
protected with a cavity tray.
Tile hanging, render finish and other cladding types are
all suitable for this application. Advice and information
on the installation of these cladding systems should be
sought from the manufacturer or provider of the
cladding system.
▶ Tightly butt boards together and use off-cuts to fill in
around waist rails.
▶ Install horizontal cavity barriers, usually in the form
Construction
Brick
Variable layer
Plywood
Cavity between studs
Gyproc Wallboard
Variable Layers
Thickness
(mm)
103.0
50.0
9.0
89.0
12.5
Thickness
(mm)
75.0
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
Thermal
Conductivity
(W/mK)
0.770
0.170
0.160
-
Thermal
Resistance
(m²K/W)
0.040
0.134
0.665
0.053
0.180
0.070
0.130
Bridge
Details
Themal
Conductivity
(W/mK)
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
0.023
U-value
dU”
Bridge
Details
(m²K/W)
0.22
0.23
0.24
0.25
0.27
0.29
0.31
0.33
0.35
0.000
0.000
0.000
0.000
0.000
0.000
0.010
0.010
0.000
delta U"=0.01
-
17.2% Mortar (103.0mm)
15% Timber (89.0mm)
-
▶ Apply vertical and horizontal cavity barriers in a
similar fashion around window and door openings.
▶ Taping the joints of the Celotex insulation with self
adhesive aluminium foil tape provides a good vapour
control layer and improves air tightness.
of mineral wool ‘sausages’, to the surface of the Celotex
insulation board at all intermediate floors.
U-value
48
T: 0901 996 0100*
www.celotex.co.uk
49
Use Celotex Tuff-R™ GA3000 high performance thermal insulation
in steel stud framed wall applications to minimise insulation
▶ Install the steel stud framework in accordance with
the manufacturer’s instructions.
▶ Ideal for lightweight, steel framed commercial
and industrial buildings
▶ Provides reliable long term energy savings
▶ If necessary, trim the Celotex insulation boards to
for buildings
width and height to ensure that the edges are fully
supported by the frame studs or horizontal runners.
▶ Low emissivity foil facer gives improved
▶ Trim boards to fit around window and door
openings.
▶ Rapid, accurate construction on-site
▶ Place the boards directly against the external face of
▶ Facilitates off-site fabrication of framed panels
the steel frame and temporarily fix with suitable selftapping screws and washers.
▶ Warm frame construction eliminates thermal
bridging through studs
▶ Adjacent boards must be tightly butted to minimise
heat loss. Joints may be sealed with self-adhesive
aluminium foil tape to improve air-tightness, if
required.
▶ Thin overall construction depth
Construction
Brick
Variable layer
Gyproc Wallboard
Gyproc Wallboard
Variable Layers
Celotex T-Break™ TB3000
Thickness
(mm)
103.0
50.0
100.0
12.5
12.5
Thickness
(mm)
75.0
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
Thermal
Conductivity
(W/mK)
0.770
0.179
0.179
-
Thermal
Resistance
(m²K/W)
0.040
0.134
0.665
0.622
0.070
0.070
0.130
Bridge
Details
Themal
Conductivity
(W/mK)
-
U-value
dU”
Bridge
Details
(m²K/W)
0.22
0.23
0.24
0.25
0.26
0.28
0.29
0.30
0.32
0.35
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.010
0.000
0.000
delta U"=0.01
-
17.2% Mortar (103.0mm)
0.3% Steel studs (100.0mm)
-
wall tie retaining channels over the boards at stud
positions and fix through the insulation into the studs
with fasteners as recommended by the channel
manufacturer.
▶ Construct the brickwork facing incorporating twist-
in ties at recommended intervals.
▶ Fit cavity barriers between the brickwork and the
face of the insulation board as required.
Other forms of cladding:
▶ Where the frame is to be faced with brickwork, place
Rainscreen
Blockwork
Render
Tile hanging
Etc.
U-value
50
T: 0901 996 0100*
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51
Underfloor heating
The specification of insulation for ground floors is
more complex than that for walls or roofs. This is
because the mechanisms for heat flow are
affected by the ratio of surface area to perimeter.
With a beam and block floor, there is little choice
but to install the insulation over the floor before
screeding. The ventilated air space beneath any
suspended floor can be very cold, so Celotex
recommends the application of a continuous
vapour control membrane over the top of the
insulation, before screeding, to reduce the risk of
condensation forming at the insulation/slab
interface. This also prevents screed migration
between the board joints, thus avoiding cold
bridges.
With a suspended timber floor, there is little
choice but to install the insulation between the
joists, but the thermal bridges created by the
joists have to be considered.
Underfloor heating is now recognised as one of
the most efficient and cost-effective forms of
domestic heating. For maximum efficiency it
requires effective insulation beneath the heating
elements to minimise heat loss downward into
the structure and to reflect the heat upwards into
the room.
Optimum positioning of the insulation within the
floor may depend on the positioning of the
insulation in the walls. For instance, when
insulating dry lining is specified for the walls,
over-slab insulation enables continuity of the
insulation to be achieved.
In over-slab installations, such as solid oversite
slabs and, more particularly, exposed solid slabs,
use a vapour control membrane over the
insulation to eliminate any risk of condensation
forming on the cold slab surface.
52
T: 0901 996 0100*
Continuity of the insulation must be ensured by
packing the spaces between the external walls
and the joists with insulation.
The void below an insulated suspended timber
floor must be well ventilated. The insulation must
be cut to fit tightly between the joists to prevent
heat loss.
Celotex insulation is the ideal solution.
Underfloor heating systems are used in
approximately 50% of all self-build homes and
increasingly in extension and conservatory
projects. Many underfloor heating companies
already make use of the high performance
characteristics of Celotex insulation.
When extending a building, adding underfloor
heating to the existing heating design can bring
major benefits, especially in applications such as
conservatories, where it is difficult to position
standard radiators and an underfloor heating
system is possibly the only acceptable form of
heating.
www.celotex.co.uk
53
Calculating the P/A ratio
U-value calculations
To calculate the minimum thickness of insulation
needed in a floor you should divide the exposed
internal perimeter by the internal area which will give
you the P/A ratio.
Example 3 – dwelling with integral
garage
The overall internal dimensions of the dwelling
are 8.50m x 6.90m; these measurements ignore
the internal walls.
The perimeter is 8.50m + 6.90m + 7.30m + 2.88m
+ 1.20m + 4.02m = 30.8m
Example 1 – detached dwelling
The overall internal dimensions of the dwelling are
8.10m x 6.90m; these measurements ignore the
internal walls. The perimeter is 8.10m + 6.90m +
8.10m + 6.90m = 30.0m
The area is (8.50m x 6.90m) – (1.20m x 2.88m) =
55.19m
The P/A ratio is 30.8 / 55.19 = 0.55
The area is 8.10m x 6.90m = 55.89m
For this example, with a concrete slab floor, you
will require:
The P/A ratio is 30 / 55.89 = 0.54
60mm of insulation to achieve 0.24 W/m2K
For this example, with a concrete slab floor, you will
require:
60mm of insulation to achieve 0.24 W/m K
2
Example 2 – new extension
The overall internal dimensions of the dwelling are
3.10m x 2.40m; these measurements ignore the
internal walls.
The perimeter is 2.40m + 3.10m + 1.22m = 6.72m
The area is 3.10m x 2.40m = 7.44m
The P/A ratio is 6.72 / 7.44 = 0.90
For this example, with a concrete slab floor, you will
require:
54
T: 0901 996 0100*
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55
Over slab installation guidelines
Under slab installation guidelines
▶ Install a damp proof membrane over the top of, or
▶ Level Hardcore & blind with sand.
below the slab. The damp proof membrane must
provide continuity with the damp proof course in the
surrounding walls.
▶ Conveniently sized boards for handling
indoors
▶ Level the surface of the slab; it should be smooth &
▶ Easy to cut boards to fit in most spaces
free of projections.
▶ If required, use a thin layer of sand blinding on a
rough, tamped slab to ensure that the insulation
boards are continuously supported.
▶ Cut & fit insulation, thickness to achieve required
▶ No thermal bridging at floor edges
U-value.
▶ Cut & fit insulation upstand to floor perimeter, to
continuity
meet a minimum R-value of 0.75M²K/W. i.e. Celotex
TB3020. The upstand depth should be equal to the
sum of the slab insulation and the screed thickness.
The upstand thickness should not exceed the
combined thickness of the wall plaster and the skirting.
Thickness
TB3012
TB3012
TB3025
TB3030
TB3035
TB3040
TB3045
GA3050
GA3055
GA3060
GA3065
GA3070
GA3075
GA3080
GA3090
GA3100
XR3110
XR3120
XR3130
XR3140
XR3150
XR3165
0.1
0.17
0.16
0.15
0.15
0.14
0.14
0.13
0.13
0.12
0.12
0.12
0.11
0.11
0.11
0.10
0.10
0.09
0.09
0.09
0.08
0.08
0.08
0.2
0.25
0.24
0.22
0.21
0.20
0.20
0.19
0.18
0.17
0.16
0.16
0.15
0.15
0.14
0.13
0.12
0.12
0.11
0.11
0.10
0.09
0.3
0.25
0.23
0.22
0.21
0.20
0.19
0.18
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.12
0.11
0.10
0.4
0.24
0.23
0.22
0.21
0.20
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.12
0.11
Perimeter / Area ratio
0.5
0.6
0.24
0.23
0.24
0.22
0.23
0.21
0.22
0.20
0.21
0.19
0.20
0.18
0.18
0.17
0.17
0.15
0.16
0.14
0.15
0.14
0.14
0.13
0.13
0.12
0.12
0.11
0.12
0.7
0.25
0.24
0.23
0.22
0.21
0.19
0.18
0.16
0.15
0.14
0.13
0.13
0.12
0.8
0.24
0.23
0.22
0.21
0.20
0.18
0.17
0.15
0.14
0.14
0.13
0.12
0.9
0.25
0.24
0.23
0.22
0.20
0.18
0.17
0.16
0.15
0.14
0.13
0.12
1.0
0.25
0.24
0.23
0.22
0.20
0.18
0.17
0.16
0.15
0.14
0.13
0.12
proof course.
▶ Cut & fit insulation, thickness to achieve required
U-value.
▶ Cut & fit insulation upstand to floor perimeter, to
meet a minimum R-value of 0.75m²K/W. i.e. Celotex
TB3020. Height of insulation to coincide with required
finished floor level.
▶ Lay concrete to required finished floor level &
smooth over with float finish.
▶ Tightly butted joints for insulation
U-Value ready reckoner: Ground Floor - Concrete Slab
▶ Install damp proof membrane & lap into damp
▶ Lay the insulation boards directly onto the prepared
slab with all joints tightly butted.
▶ Lay a polythene vapour control layer (VCL) over the
insulation to minimise the risk of condensation
forming at the insulation/slab interface and to prevent
liquid screed migration.
▶ Apply a sand/cement or self levelling screed over the
Celotex insulation boards to a minimum thickness of
65mm.
Use scaffold boards or other protection to prevent
wheelbarrows and other traffic damaging the
insulation.
These recommendations are suitable for normal
domestic floor loadings. If higher loadings are required,
it may be necessary to increase the screed thickness
and provide reinforcement within the screed.
Chipboard floor finish
A VCL should be laid over the Celotex insulation boards
and turned up 100mm at room perimeters, behind the
skirting. It is recommended good practice that all joints
should be lapped 150mm and sealed.
The chipboard must be minimum 18mm tongued and
grooved flooring grade type C4 to BS 5669. Lay the
chipboard with staggered joints, glued with a
woodworking adhesive.
Provide a 10 - 12mm gap at all perimeters and
abutments to allow for expansion. This can be achieved
by the use of temporary wedges.
Where chipboard is butted together without a
tongued and grooved joint and all external doorways
(for the width of the threshold), a treated timber batten
must be used in lieu of the insulation boards.
Use Celotex Fast-R™ FF3000, Celotex Tuff-R™ GA3000
and Celotex T-Break™ TB3000 high performance
thermal insulation in concrete slab floor applications to
minimise insulation thickness and give the
following benefits:
Based on 65mm screed & 20mm insulation as perimeter upstand
56
T: 0901 996 0100*
www.celotex.co.uk
57
Use Celotex Fast-R™ FF3000, Celotex Tuff-R™ GA3000 and
Celotex T-Break™ TB3000 high performance thermal
insulation in beam and block floors to minimise
insulation thickness and give the following benefits:
▶ If appropriate, install a damp proof membrane to the
top surface of the beam and block floor.
▶ Level the surface of the floor; it should be smooth
▶ Conveniently sized boards for handling
and free of projections. Use a thin layer of sand
blinding to ensure that the insulation boards are
continuously supported.
indoors
▶ Use Celotex T-Break™ TB3000 boards as upstands to
▶ Provide reliable long term energy
The smaller board size is much easier to handle in
confined areas, faster to lay and reduces cutting
wastage.
fit around floor perimeters to eliminate thermal
bridging at screed edges. The upstand depth should be
equal to the screed thickness. The upstand thickness
should not exceed the combined thickness of the wall
plaster and the skirting.
▶ Optimised continuity with wall
insulation
▶ Tightly butted joints for insulation
continuity
▶ Lay a polythene vapour control layer (VCL) over the
U-value ready reckoner: Ground Floor - Beam & Block
0.1
0.23
0.21
0.20
0.20
0.19
0.18
0.17
0.17
0.16
0.16
0.15
0.15
0.14
0.14
0.13
0.12
0.12
0.11
0.11
0.10
0.10
0.09
0.2
0.24
0.23
0.22
0.21
0.20
0.19
0.19
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.12
0.11
0.10
0.3
0.25
0.24
0.22
0.21
0.20
0.20
0.19
0.17
0.16
0.15
0.14
0.13
0.13
0.12
0.11
0.4
0.25
0.24
0.23
0.22
0.21
0.20
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.11
0.5
0.6
0.25
0.24
0.24
0.23
0.23
0.21
0.22
0.21
0.21
0.19
0.19
0.17
0.18
0.16
0.16
0.15
0.15
0.14
0.14
0.13
0.14
0.13
0.13
0.12
0.12
insulation to minimise the risk of condensation
forming at the insulation/slab interface and to prevent
liquid screed migration.
▶ Apply a sand/cement or self levelling screed over the
0.7
0.25
0.24
0.22
0.21
0.20
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.8
0.25
0.24
0.23
0.22
0.20
0.18
0.17
0.16
0.15
0.14
0.13
0.12
0.9
0.24
0.23
0.22
0.20
0.18
0.17
0.16
0.15
0.14
0.13
0.12
1.0
0.24
0.23
0.22
0.19
0.17
0.17
0.16
0.15
0.14
0.13
0.12
Celotex insulation boards to a minimum thickness of
65mm.
Use scaffold boards or other protection to prevent
wheelbarrows and other traffic damaging the
insulation.
Thickness
TB3012
TB3012
TB3025
TB3030
TB3035
TB3040
TB3045
GA3050
GA3055
GA3060
GA3065
GA3070
GA3075
GA3080
GA3090
GA3100
XR3110
XR3120
XR3130
XR3140
XR3150
XR3165
Celotex recommends the use of new Celotex Tuff-R™
GA3000 floor insulation for all applications involving
the use of a screed, especially when installing
underfloor heating systems, see page 62.
Based on 65mm screed & 20mm insulation as perimeter upstand
58
T: 0901 996 0100*
www.celotex.co.uk
59
Use Celotex Tuff-R™ GA3000 and Celotex Extra-R™ XR3000 high
performance thermal insulation in suspended timber floors to
▶ Install joists in the conventional manner, with solid or
▶ Insulation quick and easy to install between joists in
diagonal strut bracing as necessary. (NB: diagonal
bracing may lead to thermal bridging)
one layer
▶ Boards permanently retained by patented
Celotex insulation clip
▶ Either fit the clips at one metre maximum centres
▶ Minimise air leakage by friction fitting the
▶ Provides reliable long term energy savings
along the edge of the insulation (as described on page
13) or fix battens to the sides of the joists to support
the insulation.
for buildings
▶ Cut the Celotex insulation to achieve a tight fit, then
▶ Low emissivity foil facers to give improved
push the boards firmly down between the joists. The
insulation clip will ensure a friction fit.
insulation
thermal insulation with air spaces
▶ Insulate gaps between the joists and walls to prevent
▶ Boards are incredibly light thereby adding
thermal bridging.
minimal load to the structure
U-value ready reckoner: Ground Floor - Suspended Timber
TB3012
TB3012
TB3025
TB3030
TB3035
TB3040
TB3045
GA3050
GA3055
GA3060
GA3065
GA3070
GA3075
GA3080
GA3090
GA3100
XR3110
XR3120
XR3130
XR3140
XR3150
XR3165
0.1
0.24
0.22
0.21
0.21
0.20
0.20
0.19
0.18
0.18
0.18
0.17
0.17
0.16
0.16
0.15
0.15
0.14
0.13
0.13
0.13
0.13
0.12
0.2
0.25
0.24
0.23
0.23
0.22
0.21
0.21
0.19
0.18
0.17
0.17
0.16
0.16
0.15
0.14
0.3
0.25
0.24
0.23
0.22
0.20
0.19
0.18
0.18
0.17
0.16
0.15
0.4
0.25
0.23
0.22
0.20
0.19
0.19
0.18
0.17
0.16
0.5
0.6
0.24
0.25
0.22
0.23
0.21
0.22
0.20
0.20
0.19
0.20
0.18
0.19
0.18
0.18
0.17
0.17
directly onto the joists.
▶ Ensure that the void below the insulation is
0.7
0.25
0.23
0.22
0.21
0.20
0.19
0.18
0.17
0.8
0.24
0.22
0.21
0.20
0.20
0.18
0.17
0.9
0.24
0.23
0.21
0.21
0.20
0.19
0.17
1.0
0.24
0.23
0.21
0.21
0.20
0.19
0.17
ventilated.
▶ For exposed or semi-exposed floors, e.g. garage or
car port ceilings, it may be easier to insulate from
below.
▶ Fix Celotex insulation boards directly to the
underside of the joists with galvanised clout nails at
400mm maximum centres. Finish with an appropriate
fire protection board fixed to the soffit.
▶ An additional layer of 100mm mineral wool
insulation can be installed between the joists,
supported by the soffit lining, to provide acoustic
insulation.
Thickness
▶ Install either chipboard or softwood floor boarding
Based on timbers @ 400 Ctrs
Correction for air gaps, Delta Ug = 0.007 W/m2K
60
T: 0901 996 0100*
www.celotex.co.uk
61
Underfloor heating
Pre-installation guidelines for concrete slab
floor applications only
Installation guidelines for suspended timber
floor applications
▶ Install a damp proof membrane (DPM) below the
▶ Install joists in the conventional manner, with solid or
structure
slab or apply a liquid waterproofing membrane to the
top surface of the slab.
diagonal strut bracing as necessary. (NB: diagonal
bracing may lead to thermal bridging).
▶ The DPM must provide continuity with the damp
▶ Fix battens to the sides of the joists to support the
▶ The foam structure can be used to clip
proof course in the surrounding walls.
insulation.
the pipe system into
▶ Level the surface of the slab; it should be smooth
▶ Cut the Celotex Fast-R™ FF3000 insulation to achieve
and free of projections.
a tight fit, then push the boards
firmly down between the
joists.
▶ Minimal downward heat loss into the
▶ Use a thin layer of sand blinding on a rough tamped
savings for building structures
slab to ensure that the insulation boards are
continuously supported.
▶ Conveniently sized boards for
handling indoors
Celotex Fast-R™ Insulation for use with Under-floor Heating
Concrete Slab
Based on 65mm screed & 20 mm
insulation as perimeter upstand
Beam & Block
FF3050
FF3070
FF3075
FF3085
FF3090
FF3100
FF3125
FF3150
0.2
0.19
0.16
0.15
0.14
0.14
0.13
0.11
0.10
0.3
0.22
0.18
0.18
0.16
0.16
0.15
0.13
0.11
0.4
0.24
0.20
0.19
0.18
0.17
0.16
0.13
0.12
Based on 65mm screed & 20 mm
insulation as perimeter upstand
0.5
0.6
0.7
0.21
0.22
0.23
0.20
0.21
0.22
0.19
0.19
0.20
0.18
0.18
0.19
0.17
0.17
0.18
0.14
0.14
0.15
0.12
0.12
0.13
0.1
0.13
0.11
0.11
0.10
0.10
0.10
0.09
0.08
FF3050
FF3070
FF3075
FF3085
FF3090
FF3100
FF3125
FF3150
0.17
0.15
0.14
0.13
0.13
0.12
0.11
0.10
0.22
0.19
0.18
0.17
0.16
0.15
0.13
0.11
0.25
0.20
0.20
0.18
0.17
0.16
0.14
0.12
0.22
0.21
0.19
0.18
0.17
0.14
0.12
0.23
0.21
0.20
0.19
0.17
0.15
0.13
0.23
0.22
0.20
0.19
0.18
0.15
0.13
Based on timbers @
400 Ctrs
Thickness
FF3050
FF3070
FF3075
FF3085
FF3090
FF3100
FF3125
FF3150
0.18
0.17
0.16
0.16
0.15
0.15
0.13
0.13
0.25
0.22
0.21
0.20
0.19
0.18
0.16
0.15
0.25
0.24
0.22
0.22
0.20
0.18
0.16
0.24
0.23
0.22
0.19
0.17
0.25
0.24
0.22
0.19
0.18
0.25
0.23
0.20
0.18
0.8
0.23
0.22
0.20
0.20
0.18
0.15
0.13
0.9
0.24
0.23
0.21
0.20
0.18
0.15
0.13
1.0
0.24
0.23
0.21
0.20
0.18
0.15
0.13
0.24
0.22
0.20
0.20
0.18
0.15
0.13
0.24
0.23
0.21
0.20
0.18
0.15
0.13
0.24
0.23
0.21
0.20
0.18
0.15
0.13
0.24
0.23
0.21
0.19
0.17
0.15
0.13
0.25
0.23
0.20
0.18
0.24
0.20
0.18
0.24
0.21
0.19
0.24
0.21
0.19
Installation guidelines for concrete slab and
beam & block floor applications
▶ Use Celotex T-Break™ TB3000 boards as upstands
T: 0901 996 0100*
Suspended Timber Floor
between the joists
and wall to prevent
thermal bridging.
▶ Lay a
to fit around floor perimeters to eliminate thermal
bridging at screed edges. The upstand depth should
be equal to the sum of the slab insulation and the
screed thickness. The upstand thickness should not
exceed the combined thicknesses of the wall plaster
and the skirting.
proprietary
underfloor
heating system,
generally comprising
pipework in coils, to the
manufacturer’s
guidelines.
▶ Install either
chipboard or soft
wood floor
boarding directly
onto the joists.
▶ Install a polythene membrane over the insulation.
▶ Lay a proprietary underfloor heating system,
generally comprising pipework in coils. Pipe retaining
clips may be inserted directly onto the Celotex
insulation.
▶ Apply the screed over the Celotex insulation boards
to a thickness recommended by the manufacturer of
the underfloor heating system (normally 75mm).
▶ Compact the screed solidly when laid.
▶ Allow the screed to dry thoroughly before an
62
▶ Insulate the gaps
impermeable surface, such as a vinyl floor finish, is
applied. (Consult a specialist flooring contractor).
These recommendations are suitable for normal
domestic floor loadings. If higher loadings are required
it may be necessary to increase the screed thickness
and provide reinforcement within the screed.
▶ For exposed floors, e.g. garage or car port ceilings, it
may be easier to insulate from below. Install the
underfloor heating system in accordance with the
manufacturer’s installation instructions. Fix Celotex
insulation boards directly to the underside of the joists
with galvanised clout nails at 400mm maximum
centres. Finish with an appropriate fire protection
board fixed to the soffit.
▶ An additional layer of 100mm mineral wool
insulation can be installed between the joists to
provide acoustic insulation.
Use Celotex Fast-R™ FF3000 and Celotex T-Break™
TB3000 high performance thermal insulation with
underfloor heating applications to minimise insulation
U-value calculations
For U-value calculations, please refer to the application
specific page for the installation required.
www.celotex.co.uk
63
Garage conversions
Upgrading existing floors:
Requirement is 0.25 W/m²K
When insulating floors, either with 65mm screed
and Celotex T-Break™ TB3020 edge insulation, or
with an 18mm chipboard finish, a 1200 gauge
damp proof membrane must be laid below the
Celotex. A minimum 500 gauge polythene must
also be installed on top of the insulation to
prevent screed migration and any reaction
between the aluminium facer and the screed.
All floors depend on the ratio of the length of
the exposed perimeter of the floor divided by its
area. The exposed perimeter is measured
internally and is the length of any walls which
are not heated on the other side.
For the following P/A ratios use the following
Celotex products:
P/A ratio = 0.70 – 1.2 use Celotex Tuff-R™ GA3070,
P/A ratio= 0.45 – 0.69 use Celotex Tuff-R™ GA3060,
P/A ratio = 0.33 – 0.44 use Celotex Tuff-R™ GA3050,
P/A ratio ≤ 0.32 use Celotex T-Break™ TB3040.
NB. If using an underfloor heating system ask us
about Celotex Fast-R™ FF3000.
Upgrading existing external walls:
125mm of Celotex insulation to build up a
125mm thickness between joists. Always install
a 1000 gauge polythene VCL beneath the joists
before fixing the 12.5mm plasterboard.
same procedure but fix 12mm plywood above
the Celotex Tempchek™ Deck TD3086 to achieve
a U-value of 0.25 W/m²K.
When insulating a 103mm brick wall first fix a
breather membrane against the wall then follow
the same procedure but use Celotex T-Break™
TB3045 to achieve a U-value of 0.35 W/m²K.
Other solutions are also available depending
upon how critical internal headroom is,
examples include:
Upgrading existing or constructing
new flat ceilings: Requirement is
0.16 W/m²K
new sloping ceilings: Requirement is
0.20 W/m²K
When insulating 100 x 50mm rafters at 400mm
centres, use Celotex Tuff-R™ GA3050 between
the rafters then fix Celotex Tuff-R™ GA3060
beneath the rafters. The joints of the insulation
beneath the rafters are then taped using self
adhesive aluminium foil tape and the perimeter
edges are sealed with mastic to provide a VCL.
A 25mm batten is then installed on the line of
the rafter. Finally, fix the 12.5mm plasterboard
through the battens.
When insulating 125mm x 50mm rafters at
400mm centres, use the same fixing method as
above but use Celotex Tuff-R™ GA3075 between
the rafters and Celotex T-Break™ TB3045
beneath the rafters.
When insulating a 215mm brick wall, fix Celotex
T-Break™ TB3040 to the wall by over battening
with 25mm x 50mm battens at 600mm centres.
This is fixed through the battens and Celotex
T-Break™ TB3040 into the wall using proprietary
fixings. The joints of the insulation are then
taped using self adhesive aluminium foil tape
and the perimeter edges sealed with mastic
thereby providing a vapour control layer (VCL).
Finally, fix 12.5mm plasterboard to the battens.
When insulating 150mm x 50mm rafters at
400mm centres use Celotex Tuff-R™ GA3100
between the rafters and Celotex T-Break™
TB3035 beneath the rafters, in this instance no
batten is required.
In this way a U-value of 0.35 W/m²K is achieved.
Upgrading existing flat roofs:
When insulating a 250mm un-insulated cavity
wall, follow the same procedure and thickness of
insulation to achieve a U-value of 0.34 W/m²K.
64
When insulating a 250mm insulated cavity wall,
follow the same procedure but use Celotex
T-Break™ TB3030 to achieve a U-value of 0.35
W/m²K.
In all of the above solutions you must ventilate
the 50mm cavity above the insulation.
▶ Use Celotex Tuff-R™ GA3090 between the
joists and Celotex T-Break™ TB3020 beneath the
joists. Tape the joints of the insulation with a self
adhesive aluminium foil tape and seal the
perimeter edges with mastic to provide a VCL.
Finally, install 12.5mm plasterboard to the
underside of the insulation.
joists and Celotex T-Break™ TB3030 beneath the
Finally, install 12.5mm plasterboard to the
underside of the insulation.
joists and Celotex Tuff-R™ GA3050 beneath the
Finally, fix the 12.5mm plasterboard underneath
the insulation.
In all of the above solutions you must ventilate
the 50mm cavity above the insulation.
U-value achieved is 0.25 W/m²K in each case.
Warm flat roofs
Cold flat roofs
When using built up roofing or asphalt as the
weatherproofing layer use Celotex Tempchek™
Deck TD3086 over the joists and firrings. The
board needs a noggin under all unsupported
ends and a double bead of mastic up the firrings
and across the noggins wherever there is a butt
joint, U-value achieved is 0.25 W/m²K.
When insulating at joist level, use a total of
When using a single ply membrane, use the
T: 0901 996 0100*
Fit 100mm mineral wool or fibreglass between
ceiling joists and 150mm over the joists to
achieve a U-value of 0.16 W/m²K.
Alternatively fit Celotex Tuff-R™ GA3090
between ceiling joists and Celotex Tuff-R™
GA3070 over the ceiling joists.
In both cases a 1000 gauge polythene
membrane should be installed beneath the
ceiling joists.
Newly constructed partition wall:
100mm dense block wall
Fix Celotex Tuff-R™ GA3055 to the wall by using
25mm x 50mm battens at 600mm centres and
proprietary fixings. Tape the joints of the
insulation with self adhesive aluminium foil tape
and seal the perimeter edges with mastic to
provide a VCL. Finally, install 12.5mm
plasterboard to the battens.
100mm timber stud wall
Fix 12.5mm Fireline plasterboard to the outer
face of the stud wall. Install Celotex Tuff-R™
GA3065 between the studs, flush with the back
of the studs, thereby leaving a 35mm cavity, then
fix Celotex T-Break™ TB3012 over the inside face
of the studs. The joints of the insulation are then
taped using a self adhesive aluminium foil tape
and the perimeter sealed with mastic to provide
a VCL. Finally, fix 12. 5mm plasterboard through
to the studs to achieve a U-value of 0.30 W/m²K.
www.celotex.co.uk
65
Loft conversions
new sloping ceilings: Requirement
is 0.20 W/m²K
When insulating 100 x 50mm rafters at 400mm
centres, use Celotex Tuff-R™ GA3050 between the
rafters then fix Celotex Tuff-R™ GA3060 beneath
the rafters. The joints of the insulation beneath the
rafters are then taped using self adhesive
aluminium foil tape and the perimeter edges
sealed with mastic to provide a vapour control
layer (VCL). A 25mm batten is then installed on the
line of the rafter and then the 12.5mm
plasterboard is fixed through the battens.
When insulating 125mm x 50mm rafters at 400mm
centres, use the same fixing method as above but
use Celotex Tuff-R™ GA3075 between the rafters
and Celotex T-Break™ TB3045 beneath the rafters.
Cold flat roofs
When insulating at joist level, use a total of 165mm
of Celotex insulation to build up a 165mm
thickness between joists. Always install a 1000
gauge polythene VCL beneath the joists before
fixing the 12.5mm plasterboard.
Other solutions are also available depending upon
how critical internal headroom is, examples
include:
▶ Use Celotex Extra-R™ XR3120 between joists
and Celotex T-Break™ TB3025 beneath the joists.
Tape the joints of the Celotex with a self adhesive
aluminium foil tape and seal the perimeter edges
with mastic to provide a VCL. Finally, install 12.5mm
plasterboard to the underside of the insulation.
▶ Use Celotex Tuff-R™ GA3100 between the joists
When insulating 150mm x 50mm rafters at 400mm
centres use Celotex Tuff-R™ GA3100 between the
rafters and Celotex T-Break™ TB3035 beneath the
rafters, in this instance no batten is required.
and Celotex T-Break™ TB3035 beneath the joists.
In all of the above solutions you must ventilate the
50mm cavity above the insulation.
Constructing new flat roofs:
and Celotex Tuff-R™ GA3050 beneath the joists.
Warm flat roofs
When using built up roofing or asphalt as the
weatherproofing layer use Celotex Tempchek™
Deck TD3116 over the joists and firrings. The board
needs a noggin under all unsupported ends and a
double bead of mastic up the firrings and across
the noggins wherever there is a butt joint, U-value
achieved is 0.20 W/m²K.
When using a single ply membrane, use the same
procedure but fix 12mm plywood above the
Celotex Tempchek™ Deck TD3116. This will
and Celotex Tuff-R™ GA3060 beneath the joists.
with mastic to provide a VCL. Finally, install a 25mm
batten beneath the insulation and fix 12.5mm
plasterboard to the batten.
In all of the above solutions you must ventilate the
50mm cavity above the insulation.
When insulating a 250mm un-insulated cavity wall,
use the same procedure and thickness of
insulation to achieve a U-value of 0.33 W/m²K.
Constructing new attic walls:
When insulating a 100mm stud wall install Celotex
Tuff-R™ GA3065 between the studs, flush with the
back of the studs, thereby leaving a 35mm cavity,
then fix Celotex T-Break™ TB3012 over the inside
face of the studs. The joints of the insulation are
then taped using a self adhesive aluminium foil
tape and the perimeter sealed with mastic to
provide a VCL. Finally, fix 12. 5mm plasterboard
through to the studs to achieve a U-value of 0.30
W/m²K.
When insulating 125mm studs use Celotex Tuff-R™
GA3090 between the studs, again leaving a 35mm
cavity between the studs, then fix a 1000 gauge
polythene membrane over the studs and seal the
perimeter with mastic to provide a VCL. Finally, fix
12.5mm plasterboard through to the studs to
For 150mm studs use exactly the same procedure
to achieve a U-value of 0.29 W/m²K.
Constructing new dormer face and
cheeks: Requirement is 0.30 W/m²K
External tiling
Upgrading existing gable walls and
party walls: Requirement is 0.35 W/m²K
When insulating a 215mm brick wall, fix Celotex
66
T-Break™ TB3040 to the wall by over battening
with 25mm x 50mm battens at 600mm centres.
This is fixed through the battens and Celotex
T-Break™ TB3040 into the wall using proprietary
fixings. The joints of the insulation are then taped
using self adhesive aluminium foil tape and the
perimeter edges sealed with mastic to provide a
VCL. Finally, fix 12.5mm plasterboard to the battens
to achieve a U-value of 0.35 W/m²K.
T: 0901 996 0100*
In the case of 100mm studs with external tiling
hung over a breather membrane on top of 12mm
sheathing ply, use Celotex Tuff-R™ GA3060
between the studs, leaving a 40mm cavity
between the studs. Then over the inside face of the
studs fix Celotex T-Break™ TB3012 taping the joints
using a self adhesive aluminium foil tape and the
perimeter edges sealed with mastic to provide a
VCL. Finally, fix 12.5mm plasterboard to achieve a
U-value of 0.30 W/m²K.
External render
In the case of 100mm studs with an external render
finish, use the same procedure with Celotex Tuff-R™
GA3065 between and Celotex T-Break™ TB3012
over the face to achieve a U-value of 0.30 W/m²K.
External weatherboarding
In the case of 100mm studs with external
weatherboarding fixed over battens and a breather
membrane to create a ventilated space between
the 12mm sheathing ply, install Celotex Tuff-R™
GA3065 between the studs. Then over the inside
face of the studs fix Celotex T-Break™ TB3012
taping the joints using a self adhesive aluminium
foil tape and the perimeter edges sealed with
mastic to provide a VCL. Finally, fix 12.5mm
plasterboard to achieve a U-value of 0.30 W/m²K.
new flat ceilings: Requirement is
0.16 W/m²K
Fit 100mm mineral wool or fibreglass between
ceiling joists and 150mm over the joists to achieve
a U-value of 0.16 W/m²K.
Alternatively, fit Celotex Tuff-R™ GA3090 between
ceiling joists and Celotex Tuff-R™ GA3070 over the
ceiling joists.
In both cases a 1000 gauge polythene membrane
should be installed beneath the ceiling joists.
All the above details are correct at the time of
printing.
www.celotex.co.uk
67
Environmental sustainability policy
Celotex environmental policy
It is the policy of Celotex Limited that the Company
will at all times pursue strategies within its
operations, product development and commercial
activities to assess and minimise negative impacts
on the environment whilst adhering to the
principles of sustainable development, and to
expect similar environmental standards from its
suppliers and contractors. To satisfy this policy
objective specific attention will be paid to:
68
▶ Where possible, cut the product using a
Waste management
Celotex continually monitors the levels of waste
from its activities and drives and implements
procedures which help reduce the amount of
waste produced. The company ensures that all
employees are aware of the importance of
reducing waste in all its activities.
trimming knife, rather than a saw, to minimise
dust creation.
▶ If using a saw, dust extraction equipment, eye
protection and face masks must be provided.
Dust or particles in the eyes should be washed
out with liberal quantities of water.
▶ Aluminium foil edges may be sharp. Avoid
▶
Compliance with the requirements of environmental legislation and approved
codes of practice in all countries where we trade.
A company suggestion scheme allows all
employees to suggest methods of reducing
waste both in production and non-production
areas. Thicker boards are packed via a different
packing system, reducing the level of waste
material by introducing a returnable element
that can consistently be reused. Our current
method of cardboard packaging has seen a 30%
reduction in the quantity of cardboard used
compared to the previous method.
▶
Minimising environmentally harmful emissions and noise from manufacturing
operations.
Recycling
Quality assurance
Waste PIR is inert and land fill safe with no known
effect on ground water. Glass-fibre used as core
reinforcement in many of our boards, is made up
almost entirely from recycled waste glass,
originating from double glazing. The majority of
our boards are packed in glued and stapled
cardboard boards. This element is recyclable and
means other methods of packaging such as
shrink wrapping are avoided.
Product and application development is priority
at Celotex, with a focus on high performance,
durability and usability. This is achieved through a
quality management
system which has been fully
assessed and certified as
meeting the requirements
of BS EN ISO 9001:2000.
▶
Reducing waste generation from production and packaging of products.
▶
Raising awareness, encouraging participation and training employees in
environmental matters, especially recycling and waste reduction in nonproduction areas.
▶
Developing strategies to enable the Company’s products to be used/reused in
an environmentally-sensitive way or recycled at the end of their useful life.
▶
Optimising the use of waste materials in our manufacturing processes.
▶
Developing new product formulations to reduce long term environmental
damage to the Ozone Layer.
▶
Optimising the use of energy in all manufacturing and business activities in
order to reduce related Carbon Dioxide emissions.
▶
Using timber products from sustainable (managed) forests, where available.
▶
Liaising with the local community and participating in discussions about
environmental issues.
T: 0901 996 0100*
sliding bare hands along board edges.
Health and safety
Full guidance on the appropriate measures to be
taken by an employer in accordance with the
COSHH Regulations is provided in the Celotex
Health and Safety Data Sheet which can be
downloaded from our website.
Other products
General information
Storage and handling
▶ Celotex insulation boards should be stored
dry, flat and clear of the ground. Only as much
material as can be installed during a single
working period should be removed from storage
at any one time. If boards are stored under
tarpaulins, care should be taken to prevent rope
damage to the boards.
▶ Care should also be taken to ensure that packs
are not dropped onto corners or edges.
Celotex offers a comprehensive range of
insulation products for floor, wall and roof
applications. For information please visit
www.celotex.co.uk or contact our Sales
Department.
Ancillary components
A list of suppliers of ancillary components for the
fixing and sealing of Celotex products is available
from www.celotex.co.uk or by contacting our
Technical Advisory Service.
www.celotex.co.uk
69
Notes
Characteristics, properties or performance of materials described herein are derived from data obtained under controlled test conditions. Celotex
Limited makes no warranty, express or implied as to their characteristics under any variations from such conditions in actual constructions.
All products are supplied subject to our standard terms and conditions of sale, a copy of which is available on request.
Typical details shown in this brochure are provided for guidance only and are not to scale. Celotex Limited makes no warranty, express or implied as
to the suitability of such details for any particular project. It is the responsibility of the designer to ensure that any design or construction details used
are suitable for the project, having due regard to the environmental and structural factors which are beyond the control of Celotex Limited.
Notwithstanding the foregoing, nothing herein stated shall exclude or restrict:
1. The liability of Celotex Limited in respect of death or personal injury pursuant to the relevant provisions of the Unfair Contract Terms Act 1977, or
2. The liability of Celotex Limited in respect of any damage caused by a defect to the extent that such comes within the relevant provisions of the
Consumer Protection Act 1987.
* Calls are charged at 30p per minute from a BT landline and lines are open Monday – Friday from 8:00am – 5:15pm.
Details and pricing are correct at date of publication – August 2007.
70
T: 0901 996 0100*
www.celotex.co.uk
71
Celotex Technical Advisory Service
T: 0901 996 0100* F: 01473 820889 E: technical@celotex.co.uk
Celotex Sales
T: 01473 820820 F: 01473 828857 E: sales@celotex.co.uk
Celotex Limited
Lady Lane Industrial Estate Hadleigh Ipswich Suffolk IP7 6BA
Registered in England No. 2183896

We Know insulation Inside And Out

Transcription

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