StandardASTM C591 (rigid cellular PIR); Nestaan / Elliot bunstock per IWRA 2026-Q3
Thermal conductivity (k)0.19 @ 75°F (typ. aged design value for 2-pcf PUR/PIR)
Density2.0 lb/ft3 nominal (2# PIR per IWRA 2026-Q3 price list)
CombustibilityCombustible — protect from high heat sources; cover per code