Spray Foam Insulation for roofing applications are applied with self-contained portable spray equipment and usually require no additional special heating or handling procedures prior to application. the foam bonds securely around cornices, and in valleys and adheres to most structural materials. It forms a seamless, rigid layer of protection that combines low density with water resistance and water-vapour resistance and favourable load-bearing characteristics. Because of its excellent insulating qualities, rigid urethane foam eliminates the source of most roofing problems - shifting and cracking due to temperature changes etc.
SFI Foam speeds re-roofing operations by eliminating, in most cases, the need to remove old roofing materials. Spray application covers all exposed surfaces, and the foam bonds to most conventional roofing materials. As always the surface to be covered should be carefully examined by the spray contractor before spray application. Surfaces should be clean and free of dust, oil and loose material. After application of the foam, a membrane-type coating must be applied within 48 hours as a preventative for UV and moisture degradation.
Heat transfer resistance("R" Value) is a common standard to insulation performance. Polyurethane Foam is far more effective than any other commercially available insulation material in resisting heat transfer. This means that a centimetre of polyurethane will do the same insulating job as several centimetres of most other materials. But thats only part of the story. Sprayed polyurethane foam has other characteristics that make it an even better insulation.