WeatherMasterŪ Granular underlayment provides a secondary layer of waterproofing protection needed to help prevent damage from ice dams and windblown rain. This self-adhering modified bitumen underlayment creates a watertight barrier by sealing to the deck and around nails to provide continuous protection year after year. WeatherMasterŪ helps protect the entire deck of a properly ventilated roof or just those problem areas where water collects or drainage is slow. And, since it can go under any roofing material from asphalt shingles to tile, you can enjoy maximum protection with the architectural look you want.

• Length: 66.6'
• Width: 36"
• Square Per Roll Coverage: 2