CertainTeed's DiamondDeck® is a premium synthetic underlayment engineered for residential roofing applications. This high-performance product combines exceptional durability and reliable protection, making it ideal for various roofing systems like shingle, shake, metal or slate roofing. Constructed from a robust polypropylene and polymer composite, DiamondDeck® resists tears, punctures, and impacts, ensuring it remains effective even in severe weather conditions. Its slip-resistant surface offers secure footing for installers, enhancing safety on steep roofs. The underlayment features a superior water-resistant barrier that helps prevent moisture intrusion, safeguarding the roofing system from water damage and prolonging its lifespan. Lightweight and flexible, DiamondDeck® is easy to handle, cut, and position, making it perfect for custom roof designs. Designed to work in harmony with CertainTeed's roofing shingles, DiamondDeck® forms a comprehensive roofing system that ensures outstanding durability and performance. Together, they provide robust protection against the elements, allowing your roof to withstand challenging weather.