Polyisocyanurate Board

Polyisocyanurate (“polyiso”) board is a closed-cell rigid foam board that can be plain or faced on one or both sides. Polyiso board insulation is used in both commercial and industrial applications and provides high thermal performance and fire protection. Polyiso board has low density, good adhesion to facing, and is stable over a wide temperature range (-100°F to 250°F). It has a high R-value compared to other insulation products and low water absorption and low vapor transmission. View our selection of polyisocyanurate board below!