Products / GlasPly IV

GlasPly IV is an asphalt-impregnated fiber glass ply felt with a liquid parting agent, intended as an interply in built-up or modified bitumen roofing systems. The data sheet (RS-2073, 12-16) says it meets ASTM D2178 Type IV and prints a 36 inch by 177 foot roll with 500 square feet net coverage at a nominal 32.9 lb. Fire class depends on the roof construction listed in the UL directory. It lists a system-dependent Peak Advantage guarantee of up to 20 years.