Owens Corning WeatherLock Mat 36-Inches x 66.7-Feet 200-Sq. Feet Polypropylene Roof Underlayment Item #4141582 | Model #GPW2100 59-in(15mm) thick x 3-3/8-in wide

59-in(15mm) thick x 3-3/8-in wide x 80-in long

Proudly made in the USA

11 and A118

double-rimmed walls to avoid bowing and buckling

Owens Corning WeatherLock Mat 36-Inches x 66.7-Feet 200-Sq. Feet Polypropylene Roof Underlayment Item #4141582 | Model #GPW2100 59-in(15mm) thick x 3-3/8-in wideWeatherLock mat polypropylene roof underlayment. Acts as a second layer of protection under shingles Ideal for all underlayment applications such as full roof deck coverage, eaves, rakes, and valleys Patented Sure Step mat faced design helps provide for a consistent surface, reducing slipping, sticking, and scuffing 40% Lighter than standard mat faced underlayment products, making it easy to load, carry, and install