CertainTeed's Black Diamond Base Sheet is a heat-activated self-adhering, SBS modified, fiber glass base sheet with fine particle surfacing. It is intended for use beneath mopped and torched cap and ply sheets. Provides additional strength, improved handling, pliability, and moisture resistance when used as the first ply over non-nailable and insulated substrates. Black Diamond Base Sheet may also be used as a vapor retarder under roof insulation.
The following information represents typical average properties of Black Diamond Base Sheet:
Black Diamond Base Sheet is attached by a self-adhering method. It is not intended for attachment with hot asphalt, cold adhesive, coal tar pitch, or mechanical fasteners. Rolls should be stored upright, off ground, completely protected from the weather. Roof decks shall be structurally sound, dry, and smooth and meet or exceed minimum requirements of the deck manufacturer, local code and CertainTeed.