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Report™ |
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ESR-1349
Issued September
1,2006
This report is
subject to re-examination in one year. |
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ICC Evaluation Service, Inc.,
www.icc-es.org |
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Business/Regional 0ffice, 5360 Workman Mill Road, Whittier,
California 90601
(562) 699-0543
Regional Office, 900 Montclair Road, Suite A, Birmingham,
Alabama 35213
(205) 599-9800
Regional Office, 4051 West Flossmoor Road, Country Club
Hills, Illinois 60478
(708) 799-2305 |
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DIVISION:
07-THERMAL AND MOISTURE PROTECTION
Section: 07210-Building Insulation
Section:
07220-Roof and Deck Insulation |
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REPORT HOLDER: |
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NORTHWEST FOAM PRODUCTS, INC.
2390 ROSTRON CIRCLE
TWIN FALLS,
IDAHO 83301
(208) 734-7426
www.northwestfoam.com
info@northwestfoam.com |
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EVALUATION
SUBJECT: |
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NORTHWEST FOAM PRODUCTS EXPANDED
POLYSTYRENE INSULATION BOARDS |
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1.0 EVALUATION
SCOPE |
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Compliance
with the following codes: |
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● 2003 International Building Code®
(IBC) |
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● 2003 International Residential Code®
(IRC) |
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● 1997 Uniform Building Code™ (UBC) |
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Properties evaluated: |
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● Surface-burning characteristics |
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● Thermal resistance (R-values) |
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● Attic and crawl
space installation |
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● Physical
properties |
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2.0 USES |
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Northwest Foam Products, Inc., insulation
boards are expanded polystyrene foam plastic boards for use
as a non structural thermal insulation in buildings of Type
V (combustible) construction or structures constructed in
accordance with the IRC. The boards are used as general
insulation board on the exterior side of exterior walls, in
wall cavities, in ceiling assemblies, in attics and crawl
spaces, as roof insulation when evaluated as a component of
a roof-covering assembly in a current ICC-ES evaluation
report, and in exterior cementitious wall coating systems
when listed as a component of such systems in a current ICC-ES
evaluation report. |
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3.0
DESCRIPTION |
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The foam boards are expanded polystyrene
foam plastic that is available in various sizes and in
thicknesses up to 4 inches (102 mm) with either square or
tongue-and-groove edges. The foam plastic insulation
complies with ASTM C 578 as Type I or Type II, with nominal
densities of 1.0 and 1.5 pet (16 and 24 kg/m2),
respectively. The foam plastic insulation board exhibits a
flame-spread index of not greater than 25 and a smoke
development index of not greater than 450 when tested in
accordance with ASTM E 84. The insulation board is available
with kraft paper and foil-laminated facer applied to one
board face.
The thermal-resistance values for the
foam plastic boards without the facer having nominal
densities of 1.0 and 1.5 pcf (16 and 24 kg/m2) are 3.6 and
4.0 Hr * ft2 * °F/Btu (0.63 and 0.70 m2 * K/W),
respectively, per inch of thickness at 75°F (23.9°C) mean
temperature. |
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4.0 DESIGN AND
INSTALLATION |
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4.1 General |
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Installation of Northwest Foam Products
Expanded Polystyrene Insulation Boards shall comply with
this report and the manufacturer's published instructions.
The manufacturer's published installation instructions shall
be available at the jobsite at all times during
installation.
The insulation boards shall be attached
to supports in a manner that will secure the insulation
securely in place.
The insulation boards shall not be used as exterior stud
wall bracing. Wall bracing shall be provided in accordance
with the applicable code.
The insulation boards shall not be used
as a nailing base for exterior siding materials. All nailing
shall be made through the foam board into the wall framing
or into structural sheathing, as required by the siding
manufacturer's installation instructions and in accordance
with the applicable code. The maximum thickness of the
insulation boards applied to exterior faces of walls shall
be 11/2 inches (38 mm). The attachment of finish materials
over the insulation board shall provide a minimum 1-inch
(25.4 mm) penetration of the fasteners into the wood framing
members. Exterior wall coverings over the insulation shall
be structurally adequate to resist the required horizontal
forces perpendicular to the wall. A water-resistive barrier
shall be provided over the insulation boards in accordance
with IBC Section 1404, IRC Section R703.3 or UBC Section
1402.1, as applicable. |
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4.2 Special
Use-Attics and Crawl Spaces: |
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The Northwest Foam Products insulation
boards with a 3-inch (76 mm) maximum thickness and a
1.0-pound-per-cubic-foot (16 kg/m3) maximum nominal density,
are permitted to be installed exposed in attics and crawl
spaces without a covering applied to the attic or crawl
space side of the foam plastic as required in Section
2603.4.1.6 of the IBC, Section R314.2.3 of the IRC and
Section 2602.4 (Exception 4) of the UBC, provided all of the
following conditions are met: |
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a. |
Entry to the attic or crawl space is limited to service of
utilities, and heat-producing appliances are not permitted. |
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b. |
There are no interconnected attic or crawl space areas. |
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c. |
Air
in the attic or crawl space is not circulated to other parts
of the building. |
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d. |
Attic ventilation is provided in accordance with the IBC
Section 1203.2, IRC Section 2806 or UBC Section 1505.3, as
applicable. Under-floor ventilation is provided in
accordance with IBC Section 1203.3, IRC Section 408.1 or UBC
Section 2306.7, as applicable. |
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e. |
Combustion air is provided in accordance with Sections 701
and 703.1 of the applicable code. |
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5.0 CONDITIONS
OF USE |
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The Northwest
Foam Products insulation boards described in this report
comply with, or are suitable alternatives to what is
specified in, those codes listed in Section 1.0 of this
report, subject to the following conditions: |
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5.1 |
The boards shall be produced, identified and
installed in accordance with this report, the manufacturer's
published installation instructions and the applicable code.
The installation instructions within this report shall
govern if there are any conflicts between the manufacturer's
published installation instructions and this report. |
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5.2 |
The insulation board used in exterior
wall applications shall be covered with an approved exterior
wall covering, including a water-resistive barrier complying
with IBC Section 1404.2 or UBC Section 1402.1, or a
weather-resistant sheathing paper complying with IRC Section
R703.2, as applicable. |
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5.3 |
The insulation boards shall be separated
from the interior of the building by an approved 15-minute
thermal barrier as required by the applicable code, except
as permitted by Section 4.2 of this report. |
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5.4 |
When the insulation boards are used in
areas where the probability of termite infestation is "very
heavy. and when foam plastic insulation is used with wood
construction, the foam plastic shall be installed in
accordance with Section R320A of the IRC, where the IRC is
the adopted code. |
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5.5 |
The insulation boards shall not be used
structurally to resist transverse, vertical or in-plane
loads. Walls on which the insulation boards are applied
shall be braced in accordance with the applicable code. |
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5.6 |
The insulation board shall not be used as
a nailing base. |
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5.7 |
The insulation boards shall be used only
on buildings of Type V (combustible) construction or
structures constructed in accordance with the IRC. |
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5.8 |
The Northwest Foam Products insulation
boards are produced in Twin Falls, Idaho, under a quality
control program with inspections by RADCO (AA-650). |
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6.0 EVIDENCE
SUBMITTED |
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6.1 |
Data in accordance with the ICC-ES
Acceptance Criteria for Foam Plastic Insulation (AC12),
dated February, 2005. |
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6.2 |
Test reports on comparative crawl space
fire tests. |
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7.0
IDENTIFICATION |
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The Northwest Foam Products, Inc.,
Expanded Polystyrene Insulation Boards described in this
report are packaged in bundles bearing a label indicating
the manufacturer's name (Northwest Foam Products, Inc.) and
address, the product type, the name of the inspection agency
(RADCO), the density, the flame-spread index and smoke
developed index classification, the thermal-resistance
R-value and the evaluation report number (ESR-1349).
Individual boards are identified by a stamp bearing the
manufacturer's name, the evaluation report number and the
name of the inspection agency (RADCO). In addition, one
board in each package shall be marked on both faces with the
same information. Insulation boards intended for use in
attics or on crawl space walls, in accordance with Section
4.2, shall also bear the word "NOVA." |
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