Asphalt Felt is used as a roofing underlayment in many residential or light commercial construction projects. Product surface is uniform with guidelines for various shingle exposures. It can be used with wood, fiberglass, organic or aluminum metal roofing and siding products. Concealed waterproofing system will not detract from the architectural aesthetics of the primary roofing system. Resists cracking, drying and rotting, providing long-term waterproofing performance and low lifecycle cost. Can be used with wood, fiberglass, organic or aluminum metal roofing and siding product.