Deck-Armor 400 Sq. ft. Premium Breathable Synthetic Roofing Underlayment Roll 0901

GAF Deck-Armor Premium Breathable Underlayment provides a critical layer of protection under your asphalt shingles against wind-driven rain and other sources of moisture. Its unique breathable technology allows inside moisture to escape the roof system, helping to prevent premature roof system deterioration. Made of tough synthetic materials, it resists tearing and helps ensure long-lasting protection. Each roll of Deck-Armor contains 400 sq. ft., excluding laps