PDF - Ron Blank and Associates, Inc.

ASSURING STUCCO
PERFORMANCE
USING
NON-CORROSIVE
COMPONENTS
course #: PLC06A
1 AIA HSW CE Hour
9051 NW 97 Terrace
Miami, Florida 33178 USA
800-327-7077
© 2016 Ron Blank & Associates, Inc.
An American Institute of Architects
|AIA| Continuing Education Program
Ron Blank & Associates is a registered provider with The American 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 view the following slide for more information on Certificates of Completion
through RBA
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 handling, using,
distributing, or dealing in any material or product.
An American Institute of Architects
|AIA| Continuing Education Program
COURSE FORMAT
this is a structured, web-based, self-study course
COURSE CREDIT
1 AIA Health Safety & Welfare (HSW) CE Hour
COMPLETION CERTIFICATE
A confirmation is sent to you by email and you can print one upon
successful completion of a course or from your RonBlank.com
transcript. If you have any difficulties printing or receiving your
Certificate please send requests to [email protected]
Design professionals, please remember to print or save your certificate of completion after successfuly completing a course conclusion
quiz. Email confirmations will be sent to the email address you have
provided in your RonBlank.com account
COURSE OUTLINE
1. review of ASTM Standards and Guides
2. review of UF research on water intrusion
3. managing water intrusion with stucco accessories
4. managing the stresses in stucco with accessories
5. introduction of new ASTM standards for plastic lath
6. sustainability of Portland cement-based stucco
OBJECTIVES
1. discuss plastic stucco components and their use in the building
materials industry
2. identify various PVC accessories, their features, and their proper
application
3. define plastic lath and its appropriate placement in wall assemblies
4. identify proper usage of laths according to the ASTM standards and
Local Building Codes
EARLY SUCCESS
Rome’s King Nero’s “Golden House”
built in 68 AD, note the interior plaster
Egypt’s King Sneferu’s Bent Pyramid
built in 2600 BC had lime plaster
EARLY EXAMPLES OF
PLASTER AND LATH
The Butlerstown Castle in Waterford Ireland
- the castle was rebuilt or renovated several times between the 12th and 18th centuries
- note the early use of a plaster cladding and wooden lath
MODERN SUCCESS
STORIES
some modern examples of this versatile and durable method including residential, commercial,
institutional, and theme parks
MODERN PLASTER
plaster performance and
constructability greatly improved with
the advent of new materials
1. the invention of Portland cement in
1824 enabled plaster to develop
greater strenghts sooner
2. after World War II metal plaster bases
began to replace wood lath
3. plastic accessories and lath provide
a non - corrosive advantage over plain
and galvanized lath
DESIGN FLEXIBILITY
- compatible with most building
systems
- used on a variety of substrates
- various textures and
architectural features
- can be molded or sculpted
CUSTOM HOMES
MULTI-FAMILY
COMMERCIAL
INSTITUTIONAL
TEXTURES
ORNAMENTAL
FEATURES
BUILDING CODES
+ INDUSTRY
STANDARDS
PREVAILING
BUILDING CODES
International Code Committee (ICC)
- International Building Code (IBC)
- International Residential Code (RBC)
Florida Building Code (FBC)
- the same criteria as the IBC
INDUSTRY
STANDARDS
ASTM - American Society for Testing and Materials
a standards organization that develops and publishes voluntary consensus
technical standards for a wide range of materials, products, systems and
services
maintains 10,000 voluntary standards with 130 main committees
its 30,000 members are producers, users, general interest, and consumers
ASTM
STUCCO STANDARDS
ASTM
STUCCO STANDARDS
ASTM
DESIGN GUIDELINES
ASTM E2112
Standard Practice for Installation of Exterior Windows, Doors
and Skylights
ASTM E2266
Standard Guide for Design and Construction of Low – Rise
Frame Building Wall Systems to Resist Water Intrusion
ASTM E2112
ASTM E 2112-01
Standard Practice for Installation of Exterior
Windows, Doors and Skylights
ASTM E2266
ASTM E2266
Standard Guide for
Design and Construction
of Low-Rise Frame
Building Wall Systems to
Resist Water intrusion
WATER INTRUSION
2004 – 05 HURRICANE
DESTRUCTION
“The Federal Emergency Management Agency (FEMA) deployed numerous
teams to perform field observations to determine how residential buildings in
Florida performed during the hurricane impacts of the 2004-2005 hurricane
seasons. ……”
the majority of the damage from these storms was concentrated to the
building envelope systems such as roof coverings, soffits, doors, and
windows. ……”
In order to preclude the deleterious effects of water intrusion observed
following recent hurricane impacts the vulnerability of the building envelope
must be addressed, beginning with the window-wall interface,
and an evaluation of current window installation standards.”
RESEARCH
1
“A Laboratory Evaluation of Plastic
(Stucco) Cement-Based Plaster as
a Barrier to Water Penetration of
Concrete Masonry Construction at
Hurricane Force Wind Speeds.”
2
“Residential Window Installation
Options for Hurricane-Prone
Regions”
RESEARCH
“A Laboratory Evaluation of
Plastic (Stucco) Cement-Based
Plaster as a Barrier to Water
Penetration of Concrete Masonry
Construction at Hurricane Force
Wind Speeds.”
National Concrete Masonry
Association
This research project was conducted at the NCMA
research laboratory in Herndon, Virginia and
supported by the Florida Concrete & Products
Association and the NCMA Education and Research
Foundation.
Paper: Journal of ASTM International, March
2010
Russell T. Flynn and Jim Gulde
CONSTRUCTION
MEASUREMENTS
Saffir-Simpson Hurricane Scale
Hurricane
Sustained Wind Speed mph (kph)
1
74-95 (119-153)
2
96-110 (154-177)
3
111-130 (178-209)
4
131-155 (210-249)
5
Greater than 155 (249)
phase 1
phase 2
PHASE ONE
Round One: 4 Hours @ 62 mph
Round Two: an additional 24 hours @ 110 mph
Control Wall: Testing was ceased @ 4 hours due to
obvious intrusion
Stucco Wall showed no signs of moisture after 28 hours
PHASE TWO
Round One: 4 Hours @ 155 mph
No water visible or in the cores
Round Two: an additional 24 hours @ 180 mph
Only slight amount of water in the cores
CONCLUSION
“Stucco applied and cured in
accordance with ASTM C 926
for the two-coat, half-inch
stucco thickness does
provide significant resistance
to water penetration at
hurricane wind speeds.”
TEST METHODS
Dynamic Pressure
Negative Pressure (Static and
Cyclical)
Hydraulic Leakage Pressure
Sealant Adhesion Strength
DYNAMIC PRESSURE
TEST
Category 3
Hurricane force
of 111 – 130 mph
NEGATIVE
PRESSURE TEST
HYDRAULIC
PRESSURE TEST
SEALANT PULL TEST
TYPICAL WALL
SYSTEMS
Barrier Wall Systems
- type of wall system that is intended
to manage all water at the exterior
surface
Drainage Wall Systems
- a type of wall system in which the
cladding provides a substantial
barrier to water intrusion
- Plus a concealed water resistive
barrier over which drainage, away
from water sensitive components of
the wall, may occur
BARRIER WALL
SYSTEM
DRAINAGE WALL
SYSTEM
BARRIER WALL
RESULTS
“water barrier installation methods
simply employ a continuous exterior
seal around the window perimeter.
These installation methods
performed well on the CMU wall
specimens…”
DRAINAGE WALL
RESULTS
“the effectiveness of the drainage
method installations relies on the
ability to redirect infiltrating water to
the drainage plane of the wall”
CONCLUSIONS
Properly designed, both block
and frame walls constructed with
a properly designed and
constructed stucco veneer will
provide excellent resistance to
water intrusion
WATER
MANAGEMENT
WITH
STUCCO
ACCESSORIES
RAINSCREEN
DRAIN MAT
Use an effective rainscreen
- mitigate moisture issues
- minimize opportunities for moisture
damage and mold growth
RAINSCREEN
DRAIN MAT
What to look for
-
-
95% open design creates a
continuous capillary break and channel
for moisture to drain
durable polymer material resists most
known corrosive chemicals
does not provide a food source for mold
or mildew
minimizes staining, peeling and
blistering of exterior finishes
made from recycled materials
qualifying for LEED credits
quick, simple installation
2-ply design features backer fabric
that improves the tensile and
compressive strength properties
FLASHING
ASTM C926 A2.1.2
The construction specifier shall describe, in the appropriate section
of the contract specifications, the requirements for furnishing and
application flashing. Flashing shall be specified at openings,
perimeters, and terminations to prevent water from getting behind
plaster. Flashing shall be corrosion-resistant material.
FLOOR LINE
“Z” FLASHING
“Z” flashing for use at floor line with
plywood or other sheathing products.
“Z” flashing is non rusting and has
predrilled nail holes
WEEP SCREEDS
ASTM C1063 7.11.5 Foundation Weep
Screed
Foundation weep screed shall be
installed at the bottom of all steel or
wood framed exterior walls to receive
lath and plaster
WEEP SCREED
to be installed at plate line or stem wall,
to provide a stucco stop
design allows moisture to migrate down
and shed away from wall
FLOOR LINE CONTROL
BEAD W/ DRIP EDGE
for use as a horizontal control joint
and moisture control device where to
dissimilar materials meet
allows moisture to migrate away from
the wall
DRIP EDGE FOR ABOVE
EXTERIOR DOORS
minimizes moisture intrusion above
exterior sliding glass or French doors
SILL WEDGE
a water management product designed to
provide a positive slope at window sill
window frame sits on sloped sill wedge,
and directs moisture towards the face of
the moisture barrier where it drains out the
bottom of the system
SEALANTS
ASTM C926 A2.1.3
sealing or caulking of V-grooves,
exposed ends, and edges of plaster
panels or exterior work to prevent
entry of water shall be provided
ELASTOMERIC
SEALANT
the answer to reliable caulking of butt
joints, intersections, ends and corners in
projects that use PVC accessories
butt joint
T- type connection
MAINTAINING
SEALANTS
inspect your building annually
re-caulk any sealants
caulking & sealants: regardless of the advertised life of the
caulk material used, it should be inspected routinely for
peeling, cracking or separating. building movement can at
times exceed the caulks ability to stretch, thereby resulting in
separation. most water penetration of wall systems occurs
around penetrations in the wall system (i.e.….windows, doors,
hose bibs, etc.) Re-caulking should be done annually but not
limited to hose bibs, exterior doors and windows. Check
around power outlets and services and anywhere there is a
penetration of the stucco. When applying caulk, the product
selected should be paintable. maintaining caulked joints and
seams can prevent many instances of water intrusion. see the
caulk manufacturer’s literature for instructions of the proper
procedures for re-caulking.
re-caulking: caulking should be checked routinely for
cracking, peeling, and/or separation. Repair or re-caulk as
indicated by the manufacturer’s recommendations or as
needed.
STRESS
MANAGEMENT
WITH
STUCCO
ACCESSORIES
EXPANSION JOINTS
+ CONTROL JOINTS
control joint – one piece part
expansion joint – 2 or 3 pieces
EXPANSION JOINTS
ASTM C1063
“expansion joints shall be used to
accommodate some degree of movement
in the stucco membrane caused by
movement of the building or its
components to minimize damage to the
stucco and weather resistive barrier
ASTM C926
where an expansion joint occurs in the
base or exterior wall where dissimilar base
materials abut and are to receive a
continuous coat of plaster
EXPANSION JOINTS
2 piece
3 piece
CONTROL JOINTS
ASTM C1063
“control joints shall be installed to minimize
stress due to stucco curing and drying
shrinkage and minor movement, along
predetermined, usually straight lines and a
screed to aid in stucco thickness control”
ASTM C926
“prefabricated control joint members shall
be installed prior to the application of
plaster, therefore, the decision to use
them, the type selected, their location, and
method of installation shall be determined
and specified in project specification
sections other than the section on
plastering”
ASTM C1063
Jointing Criteria for Lath Plaster Bases
1. Control (expansion and contraction)
joints shall be installed
AREA
- walls: not more than 144 ft.2
- horizontal applications: not more
than 100 ft.2
- the distance between control joints shall
not exceed 18 ft. in either direction
- a length-to-width ratio of 2 ½ to 1
- where the ceiling framing or furring
changes direction
2. Lath shall not be continuous
throughout control joints but shall be
stopped and tied at each side
* this jointing criteria only pertains to
framed and lathed construction. it is
not required for solid based walls i.e.
concrete or concrete block construction
“V” CONTROL JOINT
the wide flange allows for more
“keying” of the stucco
“eyebrows” allow for the stucco to key
to the “v”
vertical joints should be attached to a
stud where necessary
“M” CONTROL JOINT
the wide flange allows for more
“keying” of the stucco
“eyebrows” allow for the stucco to key
to the “v”
vertical joints should be attached to a
stud where necessary
allows a larger reveal
INSIDE CORNER
CONTROL JOINT
relieves stress and cracking by
expansion and contraction in the
inside angles of walls and ceilings
one piece part
CORNER BEADS
ASTM C1063 7.11.2 Corner Beads
corner beads shall be installed to protect
all external corners and to establish
grounds
CORNER BEADS
provides a rustproof, high impact
resistant non kinking corner
the design of the hole pattern in the
flanges allows the stucco to flow
through forming a solid layer giving
the corner extra strength
CORNER BEADS
examples of corner beads on both block
walls and frame walls
CASING BEADS
ASTM C1063 7.11.3 Casing Beads
non load bearing members shall be
isolated fro load-bearing members, and
all penetrating elements, with casing
beads or other suitable means, to avoid
transfer of structural loads, and to
separate from dissimilar materials
CASING BEADS
use around openings or where stucco
terminates at a dissimilar surface
allows stucco to maintain a straight line
CASING BEAD
WITH FLANGE
1050SF
Casing Bead with
spacing flange
a great looking window or door frame
installation – ready for waterproofing
-
creates consistent spacing (3/8”)
around frame
helps keep moisture from entering
around openings
easy to handle
UV rated
window/door
frame
elastomeric
sealant
stucco
backer rod
plastic
lath
3/8”
(10 mm)
1 ¾”
(44 mm)
window/door casing bead
arched casing bead
drip edge
999
sliding step bead
substrate
(concrete block)
stucco finish
t bar casing bead
sliding step bead
control edge
drip edge
SLIDING STEP BEAD
REVEALS
decorative/aesthetic reveals
not to be confused with control
joints
AESTHETIC STUCCO
CHANNEL REVEAL
INTERSECTION
SYSTEMS
PLASTIC LATH
NON METALLIC +
NON-CORROSIVE
NON-CORROSIVE
PLASTIC LATH
NEW ASTM
STANDARDS
ASTM C 1764 Standard Test Methods
ASTM 1780 for Stone Veneer
ASTM C1787
defines criteria for installation of
non-metallic lath
“1. Scope 1.1 This specification applies
to the minimum installation requirements
for non metallic plater bases used with
Portland cement plaster in vertical wall
applications”.
ASTM C1788
defines criteria for non-metallic lath
“1. Scope 1.1 This standard provides the
minimum specification for use of non
metallic plaster bases with portland
cement based plaster in vertical wall
application.”
ASTM STANDARDS
PLASTIC LATH STRIPS
for either exterior or interior vertical
application
the ¼” self furring ridges provide
exceptional keying and are applied toward
the substrate
plastic lath strips meet ASTM C1764 and
C1780, and is impervious to sand and any
harsh chemicals found in Portland based
stucco
it may be installed over any code
approved substrate
PLASTIC LATH
also used for hardscapes, theme
parks and flooring applications
NFPA 289
National Fire
Protection Association
test method 289
PLASTIC LATH
NON CORROSIVE
VS. GALVANIZED
PLASTIC CORNER
BEAD
this?
or this?
PLASTIC CASING
BEAD
this?
or this?
PLASTIC LATH
this?
or this?
LEED CREDIT
LEED COMPLIANCE
Materials & Resources
Building Life-Cycle Impact Reduction
Building Product Disclosure and
Optimization
LEED COMPLIANCE
Materials & Resources
PVC recycled materials that are in
compliance with ASTM D4216, C926
and C1063 are preferable
REVIEW
1. Discuss plastic stucco components and their use in the building
materials industry
2. Identify various PVC accessories, their features, and their proper
application
3. Define plastic lath and its appropriate placement in wall assemblies
4. Identify proper usage of laths according to ASTM and Local
building codes
THANK YOU
ASSURING STUCCO
PERFORMANCE
USING
NON-CORROSIVE
COMPONENTS
course #: PLC06A
1 AIA HSW CE Hour
9051 NW 97 Terrace
Miami, Florida 33178 USA
800-327-7077