Fire-Rated Single-Ply Roof Insulation with Factory Laminated Glass Facer InsulFoam SP is available in a nominal density of 1lb/ft3 or 1.25lb/ ft3 , and meets or exceeds the requirements of ASTM C578, Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation. In addition, InsulFoam SP offers a long-term, stable R-value and has excellent dimensional stability, compressive strength and water resistance properties.


InsulFoam SP is specifically designed for low-sloped roof applications that employ mechanically fastened or ballasted TPO, PVC and EPDM, as well as low-sloped built-up, modified bitumen and fully adhered single-ply roofs that incorporate cover boards or slip sheets. SP is also designed for use in fully-adhered fleeceback systems with compatable adhesives. Please consult local building codes and membrane manufacturers for system requirements.