Spray foam is not affected by dampness and its R-value is not reduced by moisture. Spray foam will actually seal small leaks in a house or buildings roof and walls to stop moisture from entering. This means that spray foam also reduces mould and mildew growth, water damage and odours. Spray foam is versatile insulation that can be used anywhere in your residential, commercial or industrial building. Used as attic or ceiling insulation, spray foam will keep your building more comfortable year round and help support the structure of your roof.