For high quality roofing, choose York Ice & Water Barrier 326™ underlayment. A superior alternative to tarpaper, this 40 mil, self-adhering underlayment seals uniformly to the deck and around nail penetrations to keep out everything from routine rain and moisture problems to the extremes of ice dams and wind-driven rain. York Ice & Water Barrier 326 underlayment is an excellent choice for shingle, slate, concrete or tile roofs, in a wide variety of climates. Also makes an ideal flashing for skylights, dormers and chimneys as well as eaves, ridges and rakes.

York Ice & Water Barrier 326 underlayment is available in rolls of 200 sq. ft (3' x 66.7'/0.9m x 20m).

• Meets or exceeds all air barrier standards and specifications
• 40 mil self-adhering fiberglass-reinforced for extra strength and longevity
• Self-adhesive and cold applied; no special adhesives, heat or equipment necessary
• Safe, slip-resistant surface
• Thermally stable
• Bonds well even at low temperatures
• Split polymer release sheet