Direct answer
Most home warranties exclude insulation. Manufacturer warranties on the foam itself (Demilec, Icynene, BASF) cover material defects for 25 years. Partner-contractor workmanship warranty terms are set by your matched contractor and confirmed in writing.
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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