Sprayed Polyurethane foam roofing is an superior insulator, meets and exceeds building code requirements, and is a form of energy efficient green construction. The Foam roofs last substantially longer than other roof systems with little or no maintenance. SPF Roofs are mostly ideal on flat and low slope roofs, although there may be some exceptions. SPF is the ideal roofing material because it is thick (typically 1″ or more) and 100% waterproof. It’s a rigid spray applied polyurethane based plastic that repels water, insulates, and remains flexible for the life of the building.