Ply VI Sheet is asphalt impregnated, glass fiber mat reinforced roofing ply which has been designed to provide superior durability and ease of application. Ply VI Sheet is designed for use in the construction of Elevate Asphalt Built-Up Roof Systems. Ply VI Sheet can be used in conjunction with Elevate Modified Bitumen Base and Cap Sheets to build Hybrid Systems. Ply VI Sheet may be used as a ply in Modified Bitumen and Built-Up Roofing Systems.