GAF- Mastering The Roof (chapter 05) The drip edge is critical to provide a finished look and to... | GAF- Mastering The Roof (chapter 04) Nothing is more critical in roofing than preparing the... | Covers key installation details for properly installing StormGuard® Film-Surfaced Leak Barrier | Covers key installation details for properly installing WeatherWatch® Mineral-Surfaced Leak Barrier |