What Is Roofing Cap Sheet

Cap sheet roofs have layers of material glued together with hot asphalt, with a roll of mineral surface glued with asphalt to the top instead of gravel. Their use has decreased with the use of more modern, effective materials.

What is cap sheet used for?

The cap sheet is used to provide a watertight surface and protection and is one of the most important components of a building providing protection and comfort to its occupants.

What is a cap sheet membrane?

Self-adhesive cap sheet membrane composed of SBS modified bitumen with a high performance glass mat reinforcement. The surface is protected by granules, while the underface is covered with a split-back release protection film.