HomeMy WebLinkAboutMiscellaneous Compliance Report 2011-8-11 (2)
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ImEPARTMENT. LLC .,
Exterior. Wall Envelope
Self-Certification Form
1.-0 (() cUI lJ i tCh.;f/ (,(j ~k~ . am the general contractor or the
owner~builder atthe following address: _.
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Street Address
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City
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Permit#
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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 reverse side of
this form.]
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Date
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Revised: 2/8/2010 .
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Excerpt from 2008 Oregon Residential Specialty Code Section R703, Exterior Covering:
R703.1.1 Exterior Wall Envelope. To promote building durability, the exterior wall envelope shall
be installed in amanner 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 R703.2, a minimum 1/8
inch space between the water-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-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 enter~ 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
meets the 75% drainage efficiency requirement of ASTM E2273 or other recognized
national standards.
2. A space is not required where window sills are equipped with pan flashings which drain to '
the exterior surface of the veneer 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 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 shall be concealed with trims or other measures to protect from sunlight.
3. A space is not required where the exterior veneer is manufactured in a manner to enhance
drainage and meets the 75% drainage efficiency requirements of ASTM E2273 or other
recognized national standards and is installed over a water resistive barrier complying with
section R703.2.
4. A space is not required where the exterior veneer is matching an existing exterior finish as
in additions, alterations, or repairs.
5. A water-resistant 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
R703.8.
6. Compliance with the requirements for a means of drainage. and the requirements of
Section R703.2 and 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 representative of the intended end-use configuration.
6.2. Exterior wall envelope 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.
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.
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