American Saturated Felt (ASF) has been in the roofing materials business since 1974. Starting in the Northeast United States, we are now shipping from coast to coast and internationally.

Roof-Fast by IKO, a self-adhered membrane (SAM) system, is a low-slope roofing material that combines the polymer chemistry of commercial grade modified bitumen membranes with the self-adhesive characteristics of an ice and water protector and the beauty of a granule surface.

At International Diamond Systems, the goal is to offer: the highest quality roofing systems and materials, requiring the simplest application techniques, providing the longest life in resisting all natural elements, and warranted to be virtually trouble free.