hot-mopped asphalt for roofing definition - Architecture Dictionary

hot-mopped asphalt for roofing

A mopping-grade oxidized asphalt as defined by NIOSH: "an oxidized asphalt used principally in the construction of built-up roofing (BUR) and some modified bitumen systems; mopping-grade asphalts are produced in four grades (Types I through IV), according to the steepness of the roof