HomeMy WebLinkAboutMiscellaneous Compliance Report 2011-3-31 (2)
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Exterior Wall. Envelope
Self-Certification Form
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owner-builder at the following address:
. am the general contractor or the
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Street Address
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City
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Permit#
To conform to the 2008 Oregon Residential Specialty Code (ORSC), Section
R703.1.1, I am notifying the building official that I am aware of the exterior wall
envelope requirements of R703.1.1, and hereby certify that the components of
the exterior wall envelope have been installed in accordance with the code
requirements. [Section R703.1.1 is provided for reference on the reverseside of
this form.]
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Signature
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Date
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Revised: 2/8/2010
Excerptfrom 2008 Oregon Residential Specialty Code Section R703, Exterior Covering:
R703.1.1 Exterior Wall Envelope. To promote builaing durability, the exterior wall envelope shall
be installed in a manner that water that enters the assembly can drain to the exterior. The envelope
shall consist of an exterior veneer, a water-resistive barrier as required in R703.i, a minimum lIB
inch' space between the water-resistive barrier and the exterior veneer, and integrated flashings as
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required in R703.B. The required space shall be formed by the use .of,anY non-corrodible. furring
strip, drainage mat or drainage board. The envelope shall provide proper integration of flashings' .
with the water-resistive barrier, the space provided and the exterior veneer. These components, in
.conjunction, shall provide a means of draining water. that enters the assemb.ly to the ext'1ri."r. . \ .
Exceptions:
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1. A space is not required where the exterior v"eneer is installed over a water-resistive. barrier
complying with'~eCtion R703.2 which is manufactured in a manner to,enhance drainage,and
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meetHhe 75% drainage efficiency requirement of ASTM E2273 or other recogniied
national stinidards. .
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2. A space is not required where window sills are equipped with pan f1ashi'ngs which drain to
th'e exterior. surface .of the ve~eer in a through wall fashion: All pan flashings shall be' .
detailed within the construction documents and shall be of either a self-adhering
membrane complying' withAAMA 7i1-07 orof an approved corrosion:resistant material or
a'co.mbinationthereof. Self:adhering membranes extending to the exterior surface of the
ve'~e'er shall be. concealed with trims or other measures to protect fromsunlight. "
A space is rIOt required where the exterior veneer is manufactured in'a manner to enhance
. drainage' and meets the 7S% drainage efficiency requirements of ASTM E2273 or other
..,fe.cognized .n~tional standards and.is installed over a water resistive barriercomplying with
section.R703.2.
Aspa'ce is not 'required wh~re the exterior veneer is matching an existing exterior finish as
. in addit.i~ns, alt~rations,.or'rep~irs. ..-. .;..' . .. .' ",' _'. : . .
Awater-resistant eXterior wall envelope shall not be required over concrete or masonry .
walls designed in accordance with Chapter 6 and flashed according to se.ction R703.7 or
.R703.8..... ..... . . '.
Compl,~m'ce with the requirements for a means of drainage, and the requirelJlent5~of (.:'
Section R703.2 and Section R703.B, shall not be required for an exterior wall envelope that
has been demonstrated.to resist wind-driven rain through testing of the exterior wall
~nvel~pe, in~I,~di~gJoints, penetfa~ions ~:ind intersections with dissimil~r ~aterials,'in
'accordance with ASTM E 331 under the following conditions: .: .
6.1.' Exterior wall envelope test assemblies shall inClude at least one opening,'one c~ntrol
joint, one wall/eaveinterface and one wall sill. All tested openings and penetrations
shall be rep",sentative of the intended end-use configuration.
6.2. Exterior waUenvelope test assemblies shall be at least 4 feet by 8. feet in.size.
6.3. Exterior wall assemblies shall be tested at a minimum differential pressure of 6.24
. ... pounds per square foot. .. . .
t.4. . "Exterior wall envelope assemblies shall be subjected to a ~inimu';' test exposure
. . ... :Juration of 2 hours.
The exterior wall envelope design shall be conside'red to resist wind-driven rain where the
results of the testing indicate that water did not penetrate: control joints in the exterior
w3+1 envelope; joints at the perimeter of openings penetration; oi-intersectioris of
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t~1'li,,~tions with dissimilar materials. .
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