From extreme heat to ice dams and wind-driven rain, brutal weather can wreak havoc on your new roof. Protect it – and the house it shelters – with York Deck Shield 366™ composite underlayment. This strong, 40 mil thick composite provides a rugged barrier to physical damage, UV radiation, moisture and all kinds of weather. It features a slip-resistant polyester surface, and a modified asphalt adhesive layer that combines the installation ease of cold temperature adhesion with exceptional stability under high heat – meaning lower shingle temperatures (up to 10%) and longer shingle life.

Unmatched by any other self-adhering product in the industry, our highest quality underlayment is ideal for metal roofing systems as well as all shingle, slate, concrete or tile roofs with a pitch greater than 3'' in 12''. Preventing moisture entry into structures by sealing uniformly to the deck and around nail penetrations, it also makes an ideal flashing for skylights, dormers, vent pipes and chimneys as well as eaves, ridges and rakes.

York Deck Shield 366™ underlayment is available in rolls of 200 sq. ft. (3' x 66.7').