single ply membrane thermofol pvc

SINGLE PLY MEMBRANE
THERMOFOL PVC
UNITED KINGDOM
Bauder Limited
T: +44 (0)1473 257671 F: +44 (0)1473 230761 E: info@bauder.co.uk
bauder.co.uk
Ireland
Bauder Limited
T: +353 (0)42 9692 333 F: +353 (0)42 9692 839 E: info@bauder.ie
bauder.ie
NBS SPECIFICATIONS
www.bauder.co.uk/technical-centre
CAD
CAD DRAWINGS
www.bauder.co.uk/technical-centre
G LUE
TECHNICAL HELPLINE
T: +44 (0)1473 257671
E: technical@bauder.co.uk
AR EA
PROJECTS PORTFOLIO
E: marketing@bauder.co.uk
W: www.bauder.co.uk/media-centre
Specification Support
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OVERVIEW
QUALITY ASSURANCE
whatever the project, quality counts
REGISTERED CONTRACTORS
Having complete confidence in the products you use for construction
projects can make all the difference to achieving success. That’s why,
at Bauder, we are committed to producing solutions that meet all the
challenges a project may bring.
Bauder Thermofol products are only available to be installed by a
controlled list of registered contractors. Thermofol registered contractors
are required to provide a range of company information to Bauder to
ensure their suitability and standing to gain status as a registered installer.
The contractor must also undertake either product installation training or
a product competence assessment to ensure that the installation of the
products is to the standard required by Bauder.
n
n
n
n
n
n
Cost effective
Lightweight
Fast track flame free installation
High tensile strength
Resistant to chemical and micro-organisms
Tested and approved for green roofs
All operatives who have been trained or assessed and have been approved
to install the Thermofol products are issued with a photographic approved
badge. Bauder holds a central database list of both registered contractors
and approved trained installers.
With nearly 60 years of technical and production experience of PVC
products, and with over 20 million m² of Thermofol PVC already installed,
Bauder really is the name to trust.
ASSOCIATIONS
Bauder is a member of the Single Ply Roofing Association
Thermofol
As an association, SPRA ensures that specifiers obtain high quality polymerbased single layer roofing, through a partnership of quality assured
manufacturers and contractors.
Thermofol provides a strong and versatile solution that’s ideal for any
mechanically fastened or adhered roofing projects. Thermofol resists UV
damage and the light coloured surface is highly solar reflective.
GUARANTEED SATISFACTION
The products have high tensile strength with a pre-coated polyester cross
weave reinforcement making them resistant to punctures.
Bauder has, over the last 28 years, established a reputation for providing
guarantees which are straight forward and reflect our confidence in our
products. The Thermofol products come with a guarantee for 10, 15
or 20 years which is linked to the product thickness used. The product
guarantee will normally be issued at the completion of the project and upon
a satisfactory inspection of the installation being undertaken by Bauder.
A wide range of fasteners are available that make the mechanical
attachment of Thermofol to metal, concrete or timber and many other
types of decking materials both efficient and effective.
For applications where mechanical fastening is not suitable, two
adhered options are available; bonding either directly to the deck, in
a cold or inverted roof construction or to the insulation in a warm
roof construction.
MANUFACTURE
The production history of the original manufacturing plant based in
Germany stretches back over nearly 60 years, and now, due to unrivalled
success in the supply of single ply membranes, Bauder has recently invested
in the commissioning of a new state of the art second manufacturing facility.
This reflects Bauder’s commitment to long term investment in single
ply products and the continued willingness to investigate innovative and
environmentally conscious production methods.
Bauder’s additional single ply manufacturing
facility opened in 2009.
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Bauder’s Thermofol single ply system is widely used
and specified on projects which require high
performance, technical support and aesthetically
pleasing design solutions.
The Strada
Edinburgh
Regency Homes,
Glasgow
The Strada
Edinburgh
Walnuts School,
Milton Keynes
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INSTALLATION OPTIONS
MECHANICALLY FIXED
This option is generally used on most decking types, metal and timber being the
most common. A concrete deck with a high proportion of stone can be difficult
to mechanically fasten to, though it is possible if no other option is suitable. If this
type of system is selected, then consideration should be given to the aesthetic
appearance of the protruding fasteners on the underside of the structural decking.
The inclusion of an internal ceiling readily solves this issue.
Mechanical fastening provides a fast, safe and effective method of membrane
attachment, but it is always recommended to undertake a wind uplift calculation
to BS 6399 part 2 to ensure the correct amount of fasteners are specified. Our
technical department can provide these calculations within a project specification.
Mechanical fastening is not affected by the ambient weather conditions or
temperature and is therefore suitable for installation all year round.
ADHERED SYSTEM
An adhered system can be used effectively when the structural decking is either
difficult to mechanically fasten into, or the use of fasteners will compromise
the air leakage or internal aesthetics of the project. It can be used with either a
fleece-backed membrane or the standard non fleece-backed membrane.
Adhered systems still require an amount of mechanical restraint installed around
the perimeter of the roof area, which is designed to assist in the resistance of
wind uplift.
The finished appearance of an adhered system is generally less wrinkled than that
of a mechanically fastened system as the membrane is fully restrained over the
entire roof surface, however, the appearance will of course be affected by the
substrate it is being installed on to.
BALLASTED OR INVERTED SYSTEM
This option for membrane attachment restrains the components of both
warm roof and inverted roof systems. A suitable aggregate or paving should be
specified that will be sufficient to resist wind uplift and flotation. In this situation,
the single ply membrane needs to be protected from abrasion by the use of a
separating layer.
This type of application is approved on the understanding that the ballast / timber
decking / green roof system will be immediately installed to finished areas of
waterproofing.
If this can not be achieved, then temporary loading of the waterproofing must be
undertaken to resist wind uplift. The system can only be guaranteed whilst the
surface loading required to resist wind uplift remains in place.
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Advantages of MECH FIX
Disadvantages of MECH FIX
Calculated to BS6399
Concrete needs pre-drilling
Not affected by adverse weather Fasteners visible on underside
or temperature
of deck
Fast track installation
The membrane is positioned to give a minimum of 100 mm side lap and
150 mm head lap, a fastening is secured at one end of the sheet, and the
membrane pulled as tight as possible to remove any wrinkles or creases,
after which the remaining fasteners are installed.
The membrane is then restrained at the perimeters and abutments with a
Thermofol pre-formed metal-type detail or a linear bar and fastener with a
cover strip of membrane to provide waterproofing.
Advantages of Adhered
Disadvantages of Adhered
Non penetration of vapour barrier Weather dependant
No internal aesthetic issues
Reduced possibilities of recycling
Membrane is fully restrained over roof surface
The sheet to be installed is carefully aligned to ensure a minimum of
100 mm side lap; the end laps of adhered membranes are close butted and
a cover strap of membrane welded over the joint to provide a waterproof
cover. The membrane is bonded with any areas to be either solvent or hot
air welded kept free of the adhesive.
PICTURE
HERE
The membrane is also restrained at the perimeters and abutments with
the inclusion of a standard Thermofol pre-formed metal-type detail or a
peel-stop bar and fastener.
Advantages of BALLASTED Disadvantages
Protection of membrane
Fast track installation
High resistance to wind up-lift Weight loading to structure
Limited to a low pitch
Temporary ballasting required
during installation
The membrane is aligned to ensure a minimum of 100 mm side lap and
150 mm head lap and loose laid over the selected substrate or insulation.
It is then restrained at the all perimeters and abutments through with the
inclusion of a standard Thermofol pre-formed metal-type detail or a linear
bar and fastener, with a cover strip of membrane to provide waterproofing.
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PICTURE
HERE
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WELDING TECHNIQUES
HOT AIR WELDING
Hot air welding is used to securely join the laps of single ply membrane.
There are two principle types of welding equipment, hand welding guns
and automated trolley welding machines; both require an electrical supply
to the roof which is fed through a residual circuit breaker and is normally
obtained direct from the mains supply or by generator where appropriate.
At the correct temperature, and with the application of pressure via
the roller, the membranes fuse together and when cool provide a
homogeneous watertight joint.
Hand welding equipment
This is mainly used for installing details to the roof and allows for flexibility
of positioning of the welding equipment. It is not really suitable for installing
larger roof areas as it is slower and less controlled than using an automatic
trolley machine. Most modern hand held welding tools incorporate PID
technology which ensures that the temperature at the point of welding is
controlled and remains constant. Hand welding single ply details is a two
stage process. Welds are formed by firstly undertaking an inner pre-weld
to initially join the sheets and create an envelope which will then trap the
hot air, preventing it from escaping between the membranes during the
final welding process.
Hand Welding Equipment
Automatic welding equipment
An automated machine is larger and are more suitable for the installation of
larger areas as it delivers a constant speed and temperature at the point of
welding. The machine incorporates a heavy roller which applies pressure
to the fused membranes so that as they cool a secure weld is created. The
machine is able to operate at an average speed of 2.5m of welding per
minute and is a single stage process.
The site will require a 240v, 32amp power supply, generally delivered by
bespoke generator at roof level.
Automatic Welding Equipment
SOLVENT WELDING
The use of the specially formulated Bauder seam solvent to create
joins in the membrane is an effective alternative to hot air welding
and can be used to join membrane to membrane and membrane to
compatible accessories.
Solvent welding is a single stage process. The membrane is overlapped by
at least 50 mm to allow for a 30 mm weld and must be clean, dry and free
from dirt to accept the seam solvent which is applied by brush between
the overlap.
The solvent is applied along the length of the lap to be joined. The surfaces
to be joined are well covered with solvent (10 grams per lm) but not over
saturated as the solvent could cause damage to the insulation beneath.
The membrane is then pressure rolled and if required a temporary weight
used over the joint to ensure continuous pressure is applied until the join
has started to bond.
Solvent Welding
KEY FEATURES
Hot Air Welding
Wide operating window
Does not require solvent
Defective welds easily corrected
The joint will become waterproof after 10 mins in normal operating
temperatures and ambient conditions. Solvent welding should not be
undertaken in wet or damp conditions nor temperatures below 5ºC or
above 35ºC. After 30 minutes of completion of the welding process the
joints are inspected using a metal probe to check that the lap has fully
sealed. Any areas requiring additional bonding are opened and resealed
using hot air welding.
Solvent Welding
One stage process
No electrical supply required
Aesthetically pleasing on intricate work
WELDING TEMPERATURES & SPEED RATES
Hand Welding Trolley Weld
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Temp. 450 - 500˚C
Speed 1 - 1.5 linear meters/minute
Temp. 450 - 500˚C
Speed 2.5 linear meters/minute
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DETAILING
Pre-Coated MetaL
The installation of Bauder’s Thermofol membrane is assisted with a range
of pre-coated metal sheets, which can be used for the prefabrication
of trims or detail sections. The pre-coating of the metal sheet with a
liquid compound of the corresponding material means that an effective
compatible joint can be created when joining the two components.
Pre-coated metal is the material used within Bauder’s standard range of
details and is incorporated wherever a change of angle or direction occurs
within a detail. This method of detailing creates an aesthetically pleasing
finish as the metal can be fabricated to suit most regular angles. The
metal is also used to provide a mechanical restraint around the perimeter
of the roof area and at any change of level or abutment details. Bauder
pre-coated metal is most commonly used when the detail is of a
uniform nature and the detailing membrane is installed independently to
the structure.
Bauder Pre-Coated Metal, Edgetrims and Flashing Detail.
When sheets of pre-coated metal are joined a 3 mm expansion joint is
left between the two sheets and a cover strap of membrane welded over
the joint.
Fixing Bar
As an alternative, a Bauder fixing bar can be used in the creation of changes
in direction. The bar is mechanically fastened in to the angle of the detail
and a cover strap installed to waterproof over the fasteners. This is primarily
used when the detail is irregular in height and width, such as on tapering
insulation, and the membrane is being fully bonded to the abutment
or structure.
Details which incorporate the Bauder fixing bar will require PVC stop cord
to be welded to the surface of the membrane behind the bar to assist in
resisting the membrane from being pulled from under the fixing bar.
Bar and Cord
Fixing bars can be fastened to the vertical or horizontal structure and work
in conjunction with the PVC stop cord.
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SYSTEM ACCESSORIES
PROFILES
The incorporation of pre-extruded PVC profiles is an effective way of
reproducing the familiar appearance of a metal-type roof and adds an
aesthetic finish to a Thermofol roofing membrane.
The attachment of these profiles is a simple non-invasive operation which
can be undertaken with either hot air or seam solvent welding.
Profile strips are available for the standard colours of the Thermofol system
and are 2m long. The spacing of the profiles is dependant on the client’s
requirement for the aesthetic appearance of the finished roof but are
generally spaced at 750 mm wide centre. This spacing enables one strip to
be installed over the welded seam of the membrane to mask the joint and
the next strip to act as a batten to reduce the movement of the membrane
along the centre of the sheet.
RSPB Nature Reserve Visitor Centre
Lakenheath Fen
INSTALLATION ACCESSORIES
To ensure that our commitment to quality and problem free installation
remains firm, Bauder has developed a wide range of PVC coated or
compatible accessories for use with the Thermofol membranes. These
accessories range from the pre-coated metal used in the formation of
standard details through to a complete range of outlets suitable for inclusion
into the system.
The pre-coating of many of these accessory components with a compatible
PVC compound ensure that continued integrity can be maintained when
joining the membrane to any accessory item.
Along with the pre-coated components are a range of specialist adhesives,
solvents and cleaners to ensure that a complete waterproofing package
is available.
WALKWAYS AND PROTECTION
Thermofol walkway membrane can be installed over the waterproofing
membrane. This un-reinforced membrane has an embossed anti-slip finish
and a contrasting color to provide a clearly visible, safe area for non-regular
foot traffic.
Roof areas which will be subjected to more regular or harsh traffic can easily
be accommodated with the Thermofol system but specific requirements
should be discussed with Bauder prior to installation.
The Thermofol walkway is installed by loose laying the protective sheet
over the waterproofing membrane and sealing around the perimeter using
either the hot air welding or solvent jointing techniques.
Walkway Membrane
PROTECTION REQUIREMENTS
Alternative roof surface finishes may require different types of protection
over the Thermofol membrane prior to their installation.
COLOUR SWATCHES
PROTECTION REQUIREMENTS
Extensive Substrate
XeroFlor Extensive Vegetation
Paving Slabs
Ballast
Decking on Paver Pads
Decking on Timber Bearers*
l = not suitable
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l = not required
U12
l
l
FSM 600
FSM 600
l
FSM 600
U15
l
l
FSM 600
FSM 600
l
FSM 600
U20
FSM 600
l
FSM 600
FSM 600
l
FSM 600
FB
FSM 600
l
FSM 600
FSM 600
l
FSM 600
Light Grey
Blue Grey
RAL 7047
RAL 7031
*Required beneath the timber bearers where in contact with the waterproofing
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VAPOUR BARRIERS
There are many different vapour barriers for specification within a single ply
system, each providing different benefits to meet various project criteria.
TYPE
The selection of vapour barrier can have a number of different motivators
as well as a number of consequences to the overall design of the scheme.
Primarily split into either bituminous or polyethylene they prevent moisture
vapour under pressure passing through the waterproofing system from
inside the building which would reduce performance and longevity.
VB20
VB4
DS1 DUO
POLYETHYLENE
SBS BITUMEN
SBS BITUMEN
Torch-Applied
Self-Adhered
Attachment
Loose-Laid
Suitability
Mechanical Fix
Feature
Cost Effective
Mechanical Fix/
Adhered
Instant
Waterproofing
Adhered
Bonding Strips
for Insulation
Others are available
POLYETHYLENE VCL
Polyethylene vapour control layers are primarily used for mechanically
fastened projects when the attachment of the system does not require
adhesion to the decking structure. Polyethylene sheets are loose laid over
the supporting decking and joined and sealed using specialist adhesive
tapes. This type of vapour control layer provides a highly cost effective
solution to vapour control.
ELASTOMERIC BITUMEN MEMBRANES
These membranes are most commonly used in adhered options to
provide a secure attachment from which to build the rest of the system.
This type of vapour barrier provides a more effective defence to the
passage of vapour than a polyethylene sheet and has the advantage of
giving instant waterproofing to the deck. If the eventual waterproofing is
to be mechanically fastened then this type of vapour barrier can be used to
provide early stage waterproofing
There are two types of bitumen membrane used as vapour barriers, the
first is generally torch applied and is suitable to receive thermal insulation
bonded with specialist adhesive. The second type is a self-adhesive
product, as in our DS1 DUO, which incorporates torch-activated bonding
bitumen strips to its upper surface on to which the insulation is secured.
THERMAL INSULATION
Thermofol is suitable for use with Bauder Thermotech PIR or Bauder PIR
cut to falls insulation as well as being compatible with other types of thermal
insulation. Thermotech PIR has a glass tissue facing making it suitable for both
mechanically fastened and adhered applications and is supplied in a wide
range of thicknesses and board sizes.
Bauder PIR cut to falls is an unfaced insulation and is suitable for mechanically
fastened and fleece-back bonded applications.
Insulation suitability and compatibility should always be checked with Bauder
prior to incorporation into the system.
Tapered Insulation
PRODUCT INFORMATION
COLOUR
*(EN 12311-1)
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Environmental CREDENTIALS & green roofs
ENVIRONMENTAL CREDENTIALS
Bauder actively reprocesses back into production any available
non-contaminated production waste and recycles back energy and fuel
into the running of the factory. This re-incorporation of waste is carefully
managed to ensure that the quality and long term durability of the
manufactured membrane still meets the exacting standards of quality. If the
percentage of recycled products were to be increased to a high level the
long- term durability of the membrane could be reduced and lead to earlier
replacement and result in an overall increased environmental impact.
Bauder membranes which have been laminated with fleece-backing
and contaminated with adhesive can be recycled into industrial grade
PVC products. Alternatively, membranes which have been returned
after successful completion of their design function can be recycled
into high grade roofing accessories. Both of these processes are
undertaken at a facility located approximately 60 miles from our single ply
manufacturing plants.
All waste material from the Bauder Single Ply Training School is recycled
locally and Bauder would be happy to discuss the logistics of recycling larger
quantities of waste material if the requirement arose.
RSPB Nature Reserve
Lakenheath
GREEN ROOFS
usual lap fasteners) for each of the membrane sheets. Once installed,
these secondary fasteners must have a cover strap of membrane installed
over them to ensure waterproofing integrity. Additional fasteners are not
required on fully adhered Thermofol systems.
Creating an extensive green roof as a landscape finish to a flat roof provides
many environmental benefits including helping to mask a building into
its surroundings, particularly if it is positioned in areas sensitive to new
construction. Extensive green roofs use low maintenance and frost and
wind hardy vegetation, such as sedum plants. The roofs remain both
lightweight and cost effective if our pre-cultivated XeroFlor XF301 sedum
blankets are used to provide this vegetation. These areas are not suitable
for recreational use and should only be accessed for routine maintenance.
When Bauder SS40 drainage and retention trim is specified to retain
the XeroFlor blanket at perimeter edges and at abutments, the same
installation method used for attaching the retention strips is used.
Thermofol single ply membrane provides lightweight, cost effective
waterproofing solution in these instances. Bauder’s Thermofol membrane
has been tested and approved under the guidelines of the German
FLL (Forschungsgesellschaft Landschaftsentwicklung Landschaftsbau) to
ensure suitability as a root resistant waterproofing for extensive green
roof landscaping.
When Thermofol membrane is used on sloped roofs over 5º with our
sedum blankets, it is necessary to provide additional restraint. Bauder
retention strips featuring a row of barbed spikes are installed to the top
surface of the Thermofol membrane and held in position with a cover strap
of waterproof membrane.
On mechanically fastened Thermofol green roof installations, an additional,
centrally positioned, line of fasteners is required (placed between the
Walnuts School
Milton Keynes
APPROVALS
The Green Guide to Specification uses life cycle assessment to provide
environmental ratings for common specifications of individual major
construction elements such as a roof, wall, floor, etc. PVC single ply
waterproofing has an A+ rating within this guide which is the best
available rating under this method of assessment.
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OVERVIEW
QUALITY ASSURANCE
whatever the project, quality counts
REGISTERED CONTRACTORS
Having complete confidence in the products you use for construction
projects can make all the difference to achieving success. That’s why,
at Bauder, we are committed to producing solutions that meet all the
challenges a project may bring.
Bauder Thermofol products are only available to be installed by a
controlled list of registered contractors. Thermofol registered contractors
are required to provide a range of company information to Bauder to
ensure their suitability and standing to gain status as a registered installer.
The contractor must also undertake either product installation training or
a product competence assessment to ensure that the installation of the
products is to the standard required by Bauder.
n
n
n
n
n
n
Cost effective
Lightweight
Fast track flame free installation
High tensile strength
Resistant to chemical and micro-organisms
Tested and approved for green roofs
All operatives who have been trained or assessed and have been approved
to install the Thermofol products are issued with a photographic approved
badge. Bauder holds a central database list of both registered contractors
and approved trained installers.
With nearly 60 years of technical and production experience of PVC
products, and with over 20 million m² of Thermofol PVC already installed,
Bauder really is the name to trust.
ASSOCIATIONS
Bauder is a member of the Single Ply Roofing Association
Thermofol
As an association, SPRA ensures that specifiers obtain high quality polymerbased single layer roofing, through a partnership of quality assured
manufacturers and contractors.
Thermofol provides a strong and versatile solution that’s ideal for any
mechanically fastened or adhered roofing projects. Thermofol resists UV
damage and the light coloured surface is highly solar reflective.
GUARANTEED SATISFACTION
The products have high tensile strength with a pre-coated polyester cross
weave reinforcement making them resistant to punctures.
Bauder has, over the last 28 years, established a reputation for providing
guarantees which are straight forward and reflect our confidence in our
products. The Thermofol products come with a guarantee for 10, 15
or 20 years which is linked to the product thickness used. The product
guarantee will normally be issued at the completion of the project and upon
a satisfactory inspection of the installation being undertaken by Bauder.
A wide range of fasteners are available that make the mechanical
attachment of Thermofol to metal, concrete or timber and many other
types of decking materials both efficient and effective.
For applications where mechanical fastening is not suitable, two
adhered options are available; bonding either directly to the deck, in
a cold or inverted roof construction or to the insulation in a warm
roof construction.
MANUFACTURE
The production history of the original manufacturing plant based in
Germany stretches back over nearly 60 years, and now, due to unrivalled
success in the supply of single ply membranes, Bauder has recently invested
in the commissioning of a new state of the art second manufacturing facility.
This reflects Bauder’s commitment to long term investment in single
ply products and the continued willingness to investigate innovative and
environmentally conscious production methods.
Bauder’s additional single ply manufacturing
facility opened in 2009.
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SINGLE PLY MEMBRANE
THERMOFOL PVC
UNITED KINGDOM
Bauder Limited
T: +44 (0)1473 257671 F: +44 (0)1473 230761 E: info@bauder.co.uk
bauder.co.uk
Ireland
Bauder Limited
T: +353 (0)42 9692 333 F: +353 (0)42 9692 839 E: info@bauder.ie
bauder.ie
NBS SPECIFICATIONS
www.bauder.co.uk/technical-centre
CAD
CAD DRAWINGS
www.bauder.co.uk/technical-centre
G LUE
TECHNICAL HELPLINE
T: +44 (0)1473 257671
E: technical@bauder.co.uk
AR EA
PROJECTS PORTFOLIO
E: marketing@bauder.co.uk
W: www.bauder.co.uk/media-centre
Specification Support
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