BS 7021:1989 - Code of practice for thermal insulation of roofs externally by means of sprayed rigid polyurethane (PUR) or polyisocyanurate (PIR) foam
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BS 7021:1989 provides a code of practice for the thermal insulation of roofs using externally applied sprayed rigid polyurethane (PUR) or polyisocyanurate (PIR) foam. This standard outlines best practices to ensure effective insulation, durability, and safety in roofing applications.