All Weather/Empire™ Base

CertainTeed''''s All Weather/Empire Base Sheet is a heavyweight, SBS modified bitumen, fiber glass sheet designed for use as a base sheet for both hot and cold applied, built-up roofing systems. It is suitable for use in the construction of various types of membranes for both new construction and reroofing, over a variety of substrates. All Weather/Empire will provide additional strength, moisture resistance and asphalt uniformity when used as the first ply over nailable, non-nailable and insulated substrates. In addition, it will perform as a venting base sheet when spot mopped over plastic foam-type insulations. It is acceptable for use with both organic and inorganic roof membranes whenever a heavy duty base sheet is desired.