Vented Roof Base Sheet

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Vented roof base sheet. A lightly modified asphalt coated fiberglass base sheet or base ply. For example a lightweight concrete or nailable deck may need a venting base sheet. Firestone channel venting base is an oxidized asphalt coated fiberglass base sheet with granules on the underside of the membrane. Certainteed yosemite venting base sheet is designed for use as a buffer sheet over existing roofing membranes in lieu of a divorcing layer of roof insulation on re cover projects where the existing roofing membrane is left in place.

Firestone channel venting base is an oxidized asphalt coated fiberglass base sheet with granules on the underside of the membrane. Polyflex sa base is a premium self adhered base ply roofing membrane. Helps prevent blistering of asphalt based roofs. Designed for use under siplast systems in certain nailable applications.

Polyflex sa base is constructed with a black mineral surfaced app weathering compound uniquely formulated to provide for exceptional bonding to heat welded interply or cap sheets. 1 embossed waffle pattern grid channels. 1 embossed waffle pattern grid channels. Ventsulation felt may be used as a base sheet for any built up roofing or modified bitumen roofing system to be installed over a substrate that potentially contains moisture.

The bottom of the sheet is granule surfaced to provide positive venting of any trapped gases under the roof membrane. Helps prevent blistering of asphalt based roofs when installed over potential moisture. Promotes moisture vapor venting. 3 28 ft 1 00 m x 102 3 ft 31 2 m 3 sq 27 9 m 2 30 lb sq 1 4 kg m 2 parabase plus p.

Polyflex sa base is specifically designed to be used as a base sheet for heat welded roofing assemblies. There is a slight grid pattern embossed into the granules to further aid in venting latent moisture in the existing roof system or deck. A roofing base sheet is the bottom waterproofing layer on a multilayer roofing membrane system. A lightly modified asphalt coated fiberglass base sheet or base ply.

It is made of fiberglass or reinforced polyester or composite reinforcement and is saturated coated with modified bitumen asphalt. Gafglas stratavent nailable venting base sheet is a premium grade roofing felt constructed around a strong glass fiber mat and high quality asphalt. Gafglas stratavent perforated venting base sheet is a premium grade roofing felt with a patented perforated design that allows mopping asphalt to flow through to the substrate as the next ply of the roof system is installed.