Q: How does roofing foam work? A: Roofing foam is closed cell, monolithic polyurethane foam. As roofing foam is sprayed into place, the foam bonds to the substrate and becomes part of the structure. Forming a thick, seamless barrier, roofing foam seals penetrations, voids and junctions.
Foam Roofing, SPF - Spray Polyurethane Foam Advantages | GENERAL ROOFING SYSTEMS CANADA (GRS)