SUMMIT is a synthetic underlayment for steep slope roofs. It is made of woven polypropylene fabric that contains UV and water resistive coatings to avoid wrinkles and buckling. It is UL 790 compliant for fire resistance and offers 180-day UV exposure.
Both the face and back surfaces are coated for slip-resistant protection, providing traction and walkability on the deck. Performs in extreme temperatures from -40 to 240 degrees F.