Rigid Board
A Rigid Insulation Board is a continuous insulation material made of a fibrous material or from foam plastics such as Polyisocyanurate or Polystyrene that provides thermal and acoustical insulation strength with low weight. It can be made from foam plastics such as polyurethane (PUR), polyisocyanurate (PIR), and polystyrene, or from fibrous materials such as fiberglass, rock and slag wool. rigid foam insulation is often over-engineered in under-slab and roof applications. Readily available EPS options run up to 60 psi in compressive strength, and are strong enough for almost all building envelop applications.