Ventsulation - SBS Roofing Systems
Fiber glass-reinforced, asphalt-coated venting base sheet.
Material meets the requirements of ASTM D 4897, Type II
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.
1" Embossed Waffle Pattern Grid Channels: Promotes moisture vapor venting. Helps prevent blistering of asphalt-based roofs when installed over potential moisture-containing substrates such as: Re-covers over existing roof membranes, lightweight insulating fill or gypsum decks.
Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic base sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.
Surfacing: Coarse minerals on one side.