Cement Board Stucco Systems - Ron Blank and Associates, Inc.

Cement Board Stucco Systems
Mundise Mortimer
National Gypsum Company
2001 Rexford Road
Charlotte, NC 28211
704-365-7494
MMortimer@nationalgypsum.com
www.nationalgypsum.com
Please note: you will need to complete the conclusion quiz online at
ronblank.com to receive credit
An AIA Continuing Education Program
Credit for this course is 1 AIA/CES HSW Learning Unit
Course Number: NGC09E
An American Institute of Architects (AIA)
Continuing Education Program
Approved Promotional Statement:
g
p
provider with The American
Ron Blank & Associates, Inc. is a registered
Institute of Architects Continuing Education System. Credit earned upon
completion of this program will be reported to CES Records for AIA
members. Certificates of Completion are available for all course participants
upon completion of the course conclusion quiz with +80%.
Please note: you will need to complete the conclusion quiz online at
ronblank.com
bl k
tto receive
i credit
dit
This program is registered with the AIA/CES for continuing professional
education. As such, it does not include content that may be deemed or
construed to be an approval or endorsement by the AIA or Ron Blank &
Associates, Inc. of any material of construction or any method or manner of
h dli
handling,
using,
i
di
distributing,
t ib ti
or d
dealing
li iin any material
t i l or product.
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An American Institute of Architects (AIA)
Continuing Education Program
Course Format: This is a structured, web-based, self study course with a
final exam.
C
Course
C
Credit:
dit 1 H
Health
lth S
Safety
f t &W
Welfare
lf
(HSW) Learning
L
i Unit
U it (LU)
Completion Certificate: A confirmation is sent to you by email and you can print
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transcript If you have any difficulties printing or receiving your Certificate please
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send requests to carol@ronblank.com
Design professionals, please remember to print or save your certificate of
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Copyright
This presentation is protected by U.S.
and International copyright laws.
R
Reproduction,
d ti
di
distribution,
t ib ti
di
display
l and
d
use of the presentation without written
permission of
© Ron Blank & Associates, Inc. 2007
and
© National Gypsum Company 2007
is prohibited
prohibited.
Learning Objectives
Upon Completion of this course the Design Professional will be able to:
 Describe the different “Stucco
Stucco Look”
Look options
 Explain what Cement-Board Stucco is
 List the Code Updates
 Explain the Cement-Board Stucco Code Acceptance Criteria
 Explain the Cement-Board Stucco installation and critical details
 Specify a Cement-Board Stucco system
EFIS – Exterior Insulation Finish System
ICF = Insulated Concrete Forms
Stucco-Look Options
Stucco-Look Options
Cement Board Stucco System
Description
 High
High-impact
impact and puncture-resistant
puncture resistant
 Water-managed wall system
 Uses a cement-board core with a
2 coat synthetic stucco
 Specifically
p
y designed
g
for use in active
residential, institutional and light
commercial building
System Components
System Components
System Components
System Components
Other Cement Board
Applications
pp
Underlayment for Ceramic Tile
 Tub & Shower Enclosures
 Garden Tubs
 Swimming Pool Areas
 Whirlpool Decks
Exterior Applications
 Ceramic Tile
 Sheathing and Soffits
Cement-Board Stucco
Features
 High-impact resistance
 Water-managed
 Sheet Stucco
 2x Reinforced seams
 Reinforced base coat
 Speed/ease
application
 Shapes attach easily
Tradeoffs
 Non-insulated
 Planar irregularities
 Minor surface cracks
at joints
Benefits
 Tough, durable
 Protection
 No shrinkage cracks
 Controls seam cracks
 Weatherproofing
 Saves time & cuts
scaffolding costs
 Design flexibility
CBS = Cement Board Stucco
GL = General Liability
Comparing CBS with Stucco
Cement Board Stucco Stucco
 High-impact resistance
 Water-managed
 + Dimensional stability
 Pre-fab stucco sheet
 Fewer control joints
 Reveals framing flaws
 High-impact resistance
 Water-managed
 Insulation option
 Design criteria
 Curing required
 Control joints/144 sq. ft.
 Susceptible to
cracking only at board
joints
 No GL exclusions
 $4.50 - 5.50/sq ft
 Creates planar
irregularities
 Shrinkage cracking will
occur
 No GL exclusions
 $3.00 - $4.00/sq ft
EIFS - Exterior Insulation Finish System
GL = General Liability
Comparing CBS with EIFS
Cement Board Stucco EIFS
 High-impact resistance
 Only water-managed
 Non-insulated
 + dimensional stability
 High degree of
detailing
 Control joints
 Reveals framing flaws
 Minor surface cracks
at joints
 No GL exclusions
 $4.50 - 5.50/sq ft
 Designed impact
resistance
 PB or water-managed
 Thermal / noise
insulation
 Design criteria / light
 Unlimited detailing
 Monolithic surface
 Hides planar
irregularities
 Virtually crack-free
surfaces
 Increased
I
d GL exclusions
l i
 $4.25 - $5.50+/sq ft
CBS - Cement Board Stucco
CBS Relative Costs –
One Market
CBS
Std EIFS
Stucco Wrap
Labor
C
Cement
t Board
B d
$0.15
$0.10
$0 60
$0.60
$0.15
$0.10
Labor
M/BC seams
Labor
Lamina
L b
Labor
$0.80
$0.20
$
$0.20
$0.80
$2 40
$2.40
$5.25 >
Per square
q
foot
$0.20
$0
20
$0.75
$0.00
$0.50
$0.80
$2.25
$2
25
$4.75 >
CBS Relative Costs
OCS – One Coat Stucco
(Per sq. foot) CBS
OCS
Stucco Wrap
Labor
Cement Board
Labor
M/BC seams
Labor
$0.15
$0.10
$0.60
$0 80
$0.80
$0.20
$0.20
Stucco Wrap
Labor
Lath/Trim
Labor
Stucco
Labor
$0.15
$0.10
$0.90
$0 50
$0.50
$0.10
$1.00
Lamina
Labor
$0.80
$2.40
$5 25>
$5.25>
Finish
Labor
$0.35
$1.20
$4 30 >
$4.30
Relative Costs with Other
Cladding
g
Based on installed cost for
Residential*
Brick
WM-EIFS
$
$6.50-7.50
sq.
q ft.
$4.50-6.00 sq. ft.
CBS 1000
$4 75-5
$4.75
5.50
50 sq
sq. ft
ft.
3/8” Stucco/Finish $3.00-4.00 sq. ft.
Vinyl LG
$2 00-3 00 sq
$2.00-3.00
sq. ft
ft.
* industry average
Cement-Board
Stucco
Technical
Review
Cement Board Stucco
Secondary
y Sheathing
g Options
p
Wood based sheathing
 Resistance to racking and shear
 Typically needed on residential/wood
frame construction
Gypsum sheathing
 Fire resistive properties
 Typically needed on commercial
construction
Cement Board Stucco
Benefits of underlying/secondary
sheathing
 Stiffer wall assembly. Double
sheathing layer with offset joints
reduces stress in finish surface
 Thermal break – alleviate mechanism
for stud read through
 Solid backing for weather barrier
eases weather barrier installation;
less prone to construction damage
Intended for use
se on residential and low
lo rise
commercial construction
Cement Board Stucco
Systems
y
Limitations
 Rigid – Lack of intervening
insulation increases
stress/potential for minor cracks in
finish surface
s rface
 Thin veneer – planar irregularities
in substrate may be evident
C d Update
Code
U d t
Approximate Areas of Code
Influence
Codes
Three model code organizations:
 BOCA®
 ICBO®
 SBCCI®
1994 formed the International Code Council
(ICC®) to create a single building regulatory
ICBO Acceptance Criteria AC 59
Contains Provisions to demonstrate
compliance of Cement Board Stucco
(
(Direct
Applied Systems)
S
) with
performance requirements of the
Uniform Building Code
Code.
ICBO Evaluation Services (ES)



Only ES to address a CBS wall system
Cement board stucco evaluated under
Acceptance Criteria For Direct-Applied
Exterior Finish Systems (AC59)
AC59 addresses combustibility,
durability and serviceability
AC59
An extensive test protocol “to specify
the conditions under which a Directapplied Exterior Finish System
S
(DEFS) can be recognized in an
ICBO Evaluation Service report
report.
System Performance Testing
ICBO Acceptance Criteria for
“Direct Applied” Systems
 Freeze/thaw
 Water resistance
 Transverse load (wind)
 Tensile bond strength
 Racking/shear
 Accelerated weathering
 Salt spray
 Restrained environmental cycling
Summary of Application Steps
Framing (wood or steel)
Underlying/secondary sheathing
 Wood based or gypsum
Weather resistive barrier (except
(
t soffits)
ffit )
 Code recognized roll/sheet product
(building paper
paper, Tyvek
Tyvek, etc
etc.)) or roll-on or
trowel on liquid air/weather barrier
 Applied
pp
over underlying/secondary
y g
y
sheathing
Summary of Application Steps
Weather-Resistive Barrier –
Roll/Sheet Type
 Horizontal lap not less than 2 inches
 Vertical lap
p not less than 6 inches
 Free of holes and breaks except for
those created by fasteners
 Secure barrier with 1.0 inch minimum
crown staples or plastic washer head
nails
 Tape all seams for optimum
performance
Roll/Sheet Weather
Resistive Barrier
Liquid Air/Weather Barrier –
Roller Applied
pp
 Applicator friendly
Quick application
 Ready-mixed
Ready mixed
Applies directly to approved wall
substrates
 Liquid-Applied
Continuous membrane eliminates
seams, lap joints and staples
 Adhesive attachment of EPS
 Higher wind-load ratings
EPS - Expanded Polystyrene
Liquid Air/Weather Barrier –
Trowel Applied
pp

Creates a continuous membrane with no
seams

Breathable; resists delamination

Highly water resistant; used on sloped
parapets and window sills for added
water resistance

Low VOC content; environmentally
friendly product

Single component that is mixed with
Portland cement on the job site

Easy to mix and use
VOC – Volatile Organic Compound
Summary of Application Steps
Cement Board
 Meet ASTM C 1325
 ½” minimum thickness
 Apply
pp y either horizontally
y or vertically
y with
all vertical edges continuously supported
 Tapered edges facing outward
 Single piece around corners of openings
 Fit ends and edges closely
 Offset joints from underlying/ secondary
sheathing joints
Application
4” wide self adhering reinforcing
alkali-resistant mesh at sheathing
joints
Summary of Application Steps
Trim accessories
 Exterior grade PVC complying with
ASTM D 1784 (Plastic Components,
etc.)
 Control joint spacing – Install to
create relative square panels no
longer than 600 SF. No dimension to
exceed 24 feet or a length-to-width
ratio of 2½:1
PVC – Poly Vinyl Coatings
Sample photo
Sample photo
Sample photo
Sample photo
Application
Typical Corner and Termination
Details
Application
Trim attachment--mechanical method




Applicable on screw or nailable
substrates.
Fasten accessories 12 inches O.C.
Insure that accessories lie flat against
surface.
Use stainless steel nails, screws or
staples
Sample Photo
Summary of Application Steps
Trim accessories
 Adhesive attachment option
For non screw or nail-able
substrates
Secure accessories 12 inches O.C.
with dabs of appropriate
construction
t ti adhesive
dh i
Apply Self Adhering Mesh at
Joint
4” alkali-resistant strip
p rests in track
of the trim
Apply Self Adhering Mesh
Over All Joints
Note vertical strips
p in p
photo
Apply Base Coat over Mesh
This photo shows initial coat of
base over joints
 Board joints
 Control/expansion
p
jjoints
EPS - Expanded Polystyrene
Summary of Application Steps
Shapes, quoins, trim, etc.
 Create with adhesively fastened EPS
insulation board or ….
 Simple shapes can be constructed
with additional layers of cement
board
R i f
Reinforced
d coating
ti
system
t
 Embed Standard Reinforcing Mesh in
base coat over entire cement board
surface and allow to dry/cure
Finish Coat
 Apply to dry, reinforced base coat
Sample Photo
Sample photo
Sample photo
Summary of Application Steps
 Framing
 Underlying Sheathing
 Weather Resistive Barrier
 Cement
C
t Board
B d
 Trim Accessories
 Mesh
 Base Coat
 Shapes
 Reinforced Coating
 Finish Coat
Ph t Gallery
Photo
G ll
Application and completed projects
Work in progress
Market on the Green – Charlotte, NC
Market on the Green – Charlotte, NC
State Credit Union – Raeford, NC
Residence – Columbia, SC
Waterside IV Condo – Ft. Myers Beach, FL
Social Security Offices – Kansas City
Social Security Offices – Kansas City
Social Security Offices – Kansas City
Course Summary
The Design Professional will now be able to:
 Describe the different “Stucco Look” options
 Explain what Cement-Board Stucco is
 List the Code Updates
 Explain
p
the Cement-Board Stucco Code Acceptance
p
Criteria
 Explain the Cement-Board Stucco installation and
critical
iti l details
d t il
 Specify a Cement-Board Stucco system
Cement Board Stucco Systems
Mundise Mortimer
National Gypsum Company
2001 Rexford Road
Charlotte, NC 28211
704-365-7494
MMortimer@nationalgypsum.com
www.nationalgypsum.com
Please note: you will need to complete the conclusion quiz online at
ronblank.com to receive credit
An AIA Continuing Education Program
Credit for this course is 1 AIA/CES HSW Learning Unit
Course Number: NGC09E