HomeMy WebLinkAboutMiscellaneous Compliance Report 2011-9-8
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Exterior Wall Envelope
Self-Certification Form
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owner-builder at the following address:
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Permit#
To conform to the 2008 pregon 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 reverse side of
this form.]
Signature ./ J' /'1
Date .1/ I
Revised: 2/8/2010
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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-resistivebarrier as required in R703.i, a minimum 1/8'
inch' space between the wat!"r-resistive barrier and the exterior veneer, and integrated flashings as
required in R703.8. The required space shall be formed by the use of any non-corrodibleJurring
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 asse?,bly to the exterior.
Exceptions:
1. . A .space is not re.quired where the e~erjor v'eneer is installed over a watt~r-resistive barrier
complying with.section R703.2 which is manufaCtured.!na manner to enhance drainage and
me~tHtie 75% drainage efficiency requirement of A5TM E2273 or other recognized
national st~m/dards.': . . .
2. A space is 'not required where window sills are equipped with pan flashings which drain to
the 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 eithera self-adhering, '
membranecomplying\vith'AAMA 711-07 orofan approved corrosion:resistant material or
a'co,mbination thereof. Self-adhering membranes extending to the exterior surface of the
veneer shall be conce~led with trims or, othermeasures to protect fromsuniight.: .
3.' Aspaceis'not required'wherethe exterior veneer is manufactured in a manner to enhance
drainage and meets the 75% drainage efficiency requirementS of ASTME2273 or other
re.~ognized ,n~ti~nal, standards and is installed ove~ awater resistive barriercomplying with
section R703.2.,' " .. .
4. A space is no't"required .where the exterior veneer is matching an e~isting'e~erio~ finish as
. ,in additi~ns, alterations,. or, repairs. .
5. Awater-resistant eXterior wall envelope shall not be required over concrete or mason'ry ,
walls designed in accordance with Chapter 6 and flashed according to se,ction R703. 7 or
R703.8. ' , , '
6. Co'mpl!'an'ce with, the' requirement's for ~ means of drai'nage, and the requirements of
Section R703.2 arid Section R703.8, shall not be required for an exterior wall envelope that
has been demonstrated to, resist wind:driven rain through testing of the exterior wall
envelope, including joints, penetrations and intersections with dissimilar materials,in
accordance with ASTM E 331 under the following conditions:
6.1. Exterior wall envelope test assemblies shall inClude at least one opening, one control
joint, one wall/eave interface and one wall sill. All tested openings and penetrations
shall be representativeofthe intended end-use configuration.
6.2. · Exterior wallenvelope test assemblies shall be at least 4 feet by Ii feet in ,size.
6.3. Exterior wall assemblies shall be tested at a minimum differential pressureof 6.24
pounds per square foot. ' .
6.4. Exterior wall envelope assemblies shall be subjected to a minimum test exposure
duration of 2 hours. " ,
The exterior wall envelope design shall be considered to resist wind-driven rain where the
results of the testing indicate that water did not penetrate: control joints in the exterior
wall envelope; joints at the perimeter of openings penetration; or intersections of
terminations with dissimilar materials.