Polyurethane Insulation Selection for Schools: Spec Map
For school projects, rigid polyurethane (PU) foam board at 35-45 kg/m³ with thermal conductivity 0.019-0.024 W/(m·K) and B1/C flammability class is the default insulation spec. Match panel type (board, PIR-modified, or steel-faced sandwich) to wall vs roof assembly, then verify fire rating per local
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