NFPA Compliant Assemblies

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NFPA Compliant Assemblies Using VaproShield Membranes

Stonewood Phenolic Panels

Stonewood Panels NFPA 285 Compliant Wall Assembly (PDF)

Atlas EnergyShield Systems

Technical Evaluation Report for Atlas Roofing Corp Outlining NFPA 285 Approved Wall Assemblies (PDF)

Owens Corning - Various Wall Assemblies

Owens Corning® Enclosure Solutions NFPA 285 Accepted Complete Walls (PDF)

Rmax Exterior Wall Systems Designs 

Engineering Evaluation Engineering Extensions based on 4 NFPA Tests Prepared for Rmax Operating (PDF)

Trespa Meteon Panel Systems

Trespa NFPA 285 Compliant Wall Assemblies with VaproShield

Dow Thermax™ Rigid Insulation

Dow Thermax™ Rigid Insulation - NFPA Complying Exterior Wall Constructions With or Without Dow STYROFOAM™

Hunter Xci and VaproShield Membranes in Various Assemblies

Xci CG and Xci CG (Class A)

Xci FOIL

Xci FOIL (Class A) and Xci A286

Additional Resources

Any additional questions regarding this complicated NFPA 285 issue, please contact our Technical Dept.; 253-851-8286, Opt. 5, or This email address is being protected from spambots. You need JavaScript enabled to view it.. 

Engineering Evaluation

An alternative to NFPA 285 full wall fire testing can be provided in the form of a limited engineering analysis or Engineering Evaluation provided by an engineer familiar with the NFPA 285 test and is knowledgeable in the field. This evaluation is based on the burning characteristics of a product as determined by ASTM E1354 “Standard Test Method for Heat and Visible Smoke Release Rates for Materials and Products Using an Oxygen Consumption Calorimeter.” Values determined by the E1354 test are compared to that of the similar material used in the original NFPA 285 test.

Engineering Judgment Letters Available

For specific commercial projects, if an existing NFPA 285 assembly test is not available, VaproShield will work with our fire consultants to provide an engineering judgment letter. In most cases, VaproShield will absorb the cost of acquiring the Engineering Judgment Letter.

Exemptions for NFPA 285 Testing

In the 2015 International Building Code, Chapter 14 Exterior Walls, the following exemptions are provided as an alternative to the NFPA 285 acceptance.

1403.5 Vertical and lateral flame propagation.

  1. Walls in which the water-resistive barrier is the only combustible component and the exterior wall has a wall covering of brick, concrete, stone, terra cotta, stucco or steel with minimum thicknesses in accordance with Table 1405.2.
  2. Walls in which the water-resistive barrier is the only combustible component and the water-resistive barrier has a peak heat release rate of less than 150 kW/m2, a total heat release of less than 20 MJ/m2 and an effective heat of combustion of less than 18 MJ/kg as determined in accordance with ASTM E1354 and has a flame spread index of 25 or less and a smoke-developed index of 450 or less as determined in accordance with ASTM E84 or UL 723. The ASTM E 1354 test shall be conducted on specimens at the thickness intended for use, in the horizontal orientation and at an incident radiant heat flux of 50 kW/m2.

VaproShield’s RevealShield SA Self-Adhered meets the exemptions of 1403.5. with a heat release rate of less than 150 kW/m2, a total heat release of less than 20 MJ/m2 and an effective heat of combustion of less than 18 MJ/kg and a flame spread of 0 and a smoke developed index of 75.