Spray applied foam is designed to be an insulation, not a roof system.
Sprayed polyurethane foam can be used on almost any size or shape of roof whether the roof is of new construction or an existing roof. It is primarily seen on flat or “low sloped” roofs.
Sprayed polyurethane foam has been in use for the past 30-40 years as an insulation material. It was designed as insulation, not a roof system. The cost to repair this roof outweighs its insulating value.
Polyurethane Foam roofing often blisters which is commonly caused by the presence of moisture. It also delaminates from the existing surface, causing the need for major roof repair.