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SOL-R-SKIN Class A thermal roof underlayment assemblies

This is a listed roofing assembly. Listing 8180-2283:0501. This site cites astm-e108-ul-790. Match the model and orientation. A listing is not a permit.

CAL FIRE OSFM listing 4310-2283:0500 covers SOL-R-SKIN beneath named stone-coated steel or concrete tile roof systems, while WUI listing 8180-2283:0501 covers the Class A underlayment and foil seam tape beneath Isaiah Industries Kassel Shake at a 5:12 slope. International Insulation Products documents the foil, fiberglass, and synthetic-underlayment construction and ASTM E108 assembly testing.

Kind: listed-assembly. Brand: International Insulation Products. Listing evidence: OSFM WUI handbook 2026-08-25. Page reviewed 2026-08-25. JSON (CC BY 4.0)

• Class A is assembly-specific, not an inherent rating for every roof placed over SOL-R-SKIN. Match the exact BML listing, deck, seam tape, underlayment attachment, roof covering, battens, fasteners, and slope.
• In manufacturer-hosted Intertek report 103495318MID-001, the standing-seam metal assembly had flaming beneath the deck and no acceptance level, while the tested CF stone-coated shingle and Antica Pisa stone-coated tile assemblies met Class A criteria. Do not generalize the passing assemblies to every metal, shingle, or tile roof.
• ASTM E84 Class A/Class 1 surface-burning language is not an ASTM E108 Class A roof assembly.
• OSFM listing is not a permit. The authority having jurisdiction decides.