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Fire protection and the combustibility of the CLT assembly may need to be considered to meet local building and fire code requirements.

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For CLT construction exceeding 40 feet (122 m), section 1402.5 of the 2018 IBC requires that CLT wall assemblies with a combustible WRB membrane are tested following NFPA 285 procedures. 

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RevealShield SA Self-Adhered testing results conform to the exceptions noted in the standard.  The chart below outlines the standards vs. results from RevealShield SA.

REVEALSHIELD SA SELF-ADHERED WRB/AIR BARRIER CONE CALORIMETER TESTING RESULTS

PROPERTY REVEALSHIELD SA CONFORMS
TO EXCEPTIONS FOR 1402.5

EXCEPTION TO 2018 IBC SECTION 1402.5 

     

Peak Heat Release (HRR)

98 kW/m2 150 kW/m2 or less

Total Heat Release HR

4.0 MJ/m2 20 MJ/m2 or less

Effective Heat of Combustion

5.1 MJ/kg 18 MJ/kg or less

Flame Spread

0 25 or less

Smoke Developed

75 450 or less

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