HomeMy WebLinkAboutMiscellaneous Compliance Report 2011-6-21 (2)
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To conform to the 2008 Oregon Residential Specialty Code (OR~g), 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 thatJhe.tomponents of
the exterior wall envelope have been installed in accordance with the code
. requirements. [Section R703.1.1 is provided for reference o~the reverse side of
this form.] J
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Revised: 2/8/2010
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Excerpt from 2008 Oregon Residtntial:5pecialty q.~e Sectipn Il~, Exterior Covering:
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R703.1.1 Exterior Wall Envelojl'e"."'~ fJ~omot~ Duil~ing dur~Dility, 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."'~teI'lfsa!ive barritr q"~quired in R703.2, a minimum 1/8
. inch space between the water-resis~b3,.rer.tnd the e>O:eriol veneer, and integrated flashings as
fequired in R703.8. The required sp,"=e:shall~e.io.rme~lt; t~.. use of any non-corrodible furring
strip, drainage mat or drainage board. The envelope shall provide proper integraiio~.of fla~hings ,
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wit~ 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 assembly to the exterior.
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Exceptions:
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1. A'space is not required where the exterior veneer is installed over a water-resistive barrier
complying with section R703.2 which is manufactured in a manner to enhance drainage and
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meets the 75% drainage efficiency requirement of ASTM E2273 or other recognized . .
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national standards. .
2. A sp~ce is not required where window sills are equipped with pan flashings which drain to
the elrterior surface ofthe veneer in a through wall fashion: All pan flashings shall be
detailed.within the construction documents and shall be of either a self-adhering
membr~ne complyin'g with AAMA 711-07 or of an approved corrosion-resistant material or
a combination thereof. Self-adhering membranes extending to the exterior surface of the
veneer \hall be concealed with trims or other measures to protect from sunlight.
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3. A space is not required where the exterior veneer is manufactured in a manner to enhance
drainage :nd meets the 75% drainage efficiency requirements of ASTM E2273 or other
recognizeknational standards and is installed over a water resistive barrier complying with
section R703.2~
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4. A space is not~equired where the exterior veneer is matching an existing exterior finish as
in additions, alterations, or repairs. '
S. A water-resista~t exterior wall envelope shall not be required over concrete or masonry
walls designed in'"accordance with Chapter 6 and flashed according to section R703.7 or
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R703.8.
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6. Compliance with tne requirements for a means of drainage, and the requirements of
Section R703.2 and.5ection R703.8, shall not be required for an exterior wall envelope' that
has been demonstr~ted to resist wind-driven rain through testing of the exterior wall
envelope, including joints, penetrations and intersections with dissimilar materials, in
accordance with ASTME'331 under the following conditions:
6.1. Exterior wall envelope testassemblies shall include at least one opening, one control
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joint, one wall/eave interface and one wall, Sill. All tested openings and penetrations
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shall be representative oftheiQtended end-use configuration. "'-__
6.2. Exterior wall envelope test assemblibs shall'be at least 4 feet by 8 feet in'size.
6.3., Exterior wall assemblies shall be tested,at a r\,inimum differential pressur~ of 6.24
pounds per square foot. . f? . . ("
6.4. Exterior wall envelope assemblies sha~besubJected to a minimum t~t exposure
duration of 2 hours. \.
The exterior wall envelope design shall be considered to resist wind-driven rain where the
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results of the testing indicate that water did not penetrate: control joints in tt!e exterior
wall envelope; joints at the perimeter of openings penetration; or intersecti~ns of
terminations with dissimilar materials. " .
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