Got leaks, or just want better moisture protection? Florida is known for pounding rainstorms. When storm force winds are present, you want the best protection. Upgrade your new roof or re-roof with a premium moisture barriers. Godwin Roofing DiamondDeck is a synthetic, scrim-reinforced, water-resistant underlayment that can be used beneath shingle, shake, or metal roofs. It has exceptional dimensional stability compared to standard felt underlayment.