Firestone Channel Venting Base is an oxidized asphalt-coated fiberglass base sheet with granules on the underside of the membrane. There is a slight grid pattern embossed into the granules to further aid in venting latent moisture in the existing roof system or deck. It is designed to be mechanically fastened over lightweight concrete roof decks or other surfaces as a base for Firestone modified bitumen or built-up roofing systems. The sanded top surface is suitable for installation of the roofing system using a self-adhered base sheet, hot asphalt, Firestone MB Cold Adhesive, or a roofing torch.
Features and Benefits
- Lightly embossed granule surface underside
- Heavy fiberglass-reinforced mat
- Sanded top surface
- Allows movement of vapor to reduce chance of blisters in finished roof
- Strong and tough
- Easy to install roof system to top surface with a self-adhered base sheet, hot asphalt, Firestone MB Cold Adhesive, or a roofing torch