HomeMy WebLinkAboutCODE COMPLIANCE REPORT 4-17-13SCANNED
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Code Compliance Research Report
Subject: SES Foam 0.5 lb ISpray
Spray -Applied Polyurethane Foam Insulation System
Supplement to ESR-3375
• Alternative Assemblies using TPRZ F10E Coating
• Recognized Maximum Thickness behind Prescriptive Thermal Barrier
Date: April 17, 2013
Materials: SES Foam 0.5 lb Spray
Test Standards: 1. ASTM E 84 Test for Surface Burning Characteristics of Building Materials
2. NFPA 286 Standard Methods of Fire Tests for Evaluating Contribution of
Wall and Ceiling Interior Finish to Room Fire Growth
Purpose and Scope:
Since the issuance ofESR-3375 byICC Evaluation Service, two situations have occurred with affect
the interpretation of that report. Namely:
1. SES Foam has conducted additional testing of the SES Foam 0.5 lb Spray (also identified
under the trademark "Sucraseal") with the intumescent coating TPRz F10E for use as an
alternate assembly to the use of a thermal barrier; and
2. Revisions to AC 377 (Acceptance Criteria for Spray -Applied Foam Plastic Insulation)
promulgated in November 2012 have changed the requirements for the recognition of
maximum thickness limitations when spray -applied foam plastic insulation is covered with a
prescriptive thermal barrier.
The intent ofthis Supplement to ESR-3375 is to provide guidance on the interpretation of that report
in view of the above changes.
Summary:
1. Based on the test data submitted and the reference documents, the thermal barrier required
by IBC Section 2603 and/or IRC Section R316 may be omitted when:
• The thickness of SES Foam 0.5 lb Spray does not exceed 11.5 inches in walls and/or
ceilings, and
• The SES Foam 0.51b Spray is coated with a minimum of 14 dry mils (application rate
of 80 ft2/gal) of TPR2 F10E intumescent coating.
Deer Ridge Consulting, Inc.
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2. Based on AC 377 (November 2012) Section 3.2.2.3, and the ASTM E84 testing summarized
in ESR-3375, the installed thickness of SES Foam 0.5 lb Spray is not limited when separated
from the interior by ail prescriptive thermal barrier (i.e., 1/2-inch [minimum] gypsum
wallboard).
Discussion:
Alternative Assembly: In IBC Section 2603.10 (Special approval) and IRC Section R316.6
(Specific approval), the building code permits alternate assemblies to the use of the required
thermal barrier when tested in accordance with specific tests. One such test is NFPA 286
(Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior
Finish to Room Fire Growth) when used in combination with the acceptance criteria of IBC
Section 803.1.2.1 or IRCISection R302.9.4. (NFPA 286 does not provide its own acceptance
criteria, hence this is specifically defined within the building codes.)
SES Foam 0.5 lb Spray Was tested in accordance with NFPA 286 with results reported in
QAI Laboratories Test Report No. TJ0934, March 12, 2013 wherein the spray foam was
coated with the intumescent coating TPRZ F10E. The test result successfully passed the
acceptance criteria as defined in the IBC and IRC.
Therefore, the thermal barrier as required in IBC Section 2603 and/or IRC Section 316 may
be omitted provided the following limitations are observed:
• The maximum thickness SES Foam 0.5 lb Spray in wall and ceiling assemblies is
limited to 11.5 it,
• The SES Foam 0.5 lb Spray is coated with 14 mils minimum dry film thickness
(application rate o� 80 ft2 per gallon) of TPRZ F10E intumescent coating.
2. Maximum thickness: The maximum thickness that can be tested in accordance with ASTM
E .84 is four (4) inches. For thicknesses greater than four inches, the IBC (Section 2603.3,
Exception 4) and the IRC (R316.3, Exception) provide for testing greater thicknesses in
accordance with the Special Approval and Specific Approval sections, respectively.
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Traditionally, small room corner tests (such as NFPA 286) were employed to test thicknesses
greater than 4 inches, with the spray foam covered with a prescriptive thermal barrier (i.e.,
1/2-inch gypsum wallboard). However, after reviewing voluminous small room corner test
results, ICC-ES staff recommended and the ICC-ES board approved a modification to AC
377 wherein this test protocol maybe omitted. Under this provision, the maximum thickness
of the spray foam is not limited. The limitations placed on this provision reflect the data that
ICC-ES reviewed, namely:)
• The spray foam product must have passed ASTM E84 testing at a thickness of four
(4) inches with maximum flame spread and smoke developed results of 25 and 450
respectively.
• The spray foamproduct must be separated from the building interior by a prescriptive
thermal barrier (1/2�inch [min.] gypsum wallboard is the only prescriptive thermal
barrier listed in the building code).
The provisions described above are within AC 377, Section 3.2.2.3 (November 2012).
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505 Deer Ridge Lane • Ararat, VA 24053 • 276-755-9162 • www.deer-ridge-consulting.com
Deer Ridge Consulting, Inc.
Page 3 of 4
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SES Foam 0.5 lb Spray has been tested in accordance with ASTM E84 with flame spread of
less than 25 and smoke developed of less than 450. Therefore, SES Foam 0.5 lb Spray falls
within the provisions of AC 377, Section 3.2.2.3 and may be installed at any thickness
provided it is covered with a prescriptive thermal barrier.
Conclusions:
SES Foam'/2 lb Spray foam plastic insulation meets the requirements and intent of the IBC and IRC
as specified and as limited in thel Summary section above.
Respectfully submitted,
Deer Ridge Consulting, Inc.
Roger V. Morrison, PE, RRC
President
505 Deer Ridge Lane • Ararat, VA 24053 • 276-755-9162 • www.deer-ridge-consulting.com
Deer Ridge Consulting, Inc.
Reference Documents:
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1. 2009 and 2012 International Building Code: Sections 803.1.2.1; 2603.
2. 2009 and 2012 InternatiI onal Residential Code: Sections R302.9.4; R316.
3. QAI Laboratories Test Report No. TJ0934, March 12, 2013 (NFPA 286).
4. Acceptance Criteria1377, November 2012.
505 Deer Ridge Lane I • Ararat, VA 24053 • 276-755-9162 • www.deer-ridge-consulting.com
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