Pipe Flashing for North California is made of 26 Gauge Galvanized Steel or Aluminum.  Shingle or Shake Bases, Pitch is Flat-to-5/12, for any types of pipe. Pipe Flashings, or boots, are used to seal around vent pipes that penetrate through the roof. One piece construction makes this flashing reliable and easy to install. They protect against leaks around kitchen, bath, laundry and water heater exhaust pipes that terminate through the roof. For architectural, residential, and commercial roofing. ASTM A-653, ASTM A-792