This video shows how GAF was the leading innovator in the evolution of the laminated shingle. By... | GAF- Mastering The Roof (chapter 13) Flashing is used to seal and protects joints in a building... | Este video demuestra la técnica de instalación correcta de las tejas de hilada inicial. Las... | Este video demuestra la técnica de instalación correcta de las Tejas Timberline ® | GAF- Mastering The Roof (chapter 11) This video demonstrates the proper installation technique... | Industry breakthrough! All GAF laminated shingles now carry a Lifetime Ltd. Warranty. |