Direct answer
Spray foam itself is combustible if directly exposed to flame. Building code requires a 'thermal barrier' (typically 1/2-inch drywall or DC315 paint) over foam in living spaces. Partner-network installers handle both code-compliant assemblies.
Authoritative sources
DOE Energy Saver guide to insulation types, R-values, and recommended applications.
Energy Efficient Home Improvement Credit, up to $1,200/yr for qualifying insulation work.
Energy Star recommendations for attic and wall insulation R-values by climate zone.
Related questions
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