Products / WeatherBond SureMB Vented Base Sheet

A heavyweight venting base sheet made from a fiberglass mat coated with weathering-grade asphalt, with mineral granules embedded in an embossed brick and stone pattern on the bottom surface to vent vapor beneath the base ply. It is used over lightweight insulating concrete or gypsum decks and fastened with WeatherBond Dual Prong Base Sheet Fasteners. Rolls are 39.38 inches by 33 feet, about 86 lbs, covering 100 square feet; the bulletin cites ASTM D4897 and lists manufacture in Naples, TX.