This specification covers petroleum asphalt for use as hot-cement and mopping coat in the construction of built-up roof coverings, in dampproofing, and in the construction of a membrane system of waterproofing. Intended Use: The suggested use for each type is not absolute, and overlapping of fields of use may occur between adjoining types, depending upon the kind and occupancy of the building involved; the kind of roof employed; the presence, absence, or thickness of any insulation; the specific material and construction used in the roofing membrane itself; and the temperatures and other climatic conditions to which the roofing may be subjected in service.

    Type I   - Suitable for use on roofs with inclines up to 1 inch per foot.     Type II  - Suitable for use on roofs with inclines from ½ up to 3 inches per foot.     Type III - Suitable for use on inclines from ½ to 6 inches per foot.     Type IV  - Suitable for use on roofs with relatively steep slopes and generally in areas with                relatively high temperatures.     Type V   - Suitable for use below ground level moderate temperature conditions both during the                process of installation and service.     Type VI  - Suitable for use above ground level where not exposed to temperatures exceeding                125°F. (52°C.)     Type VII - Suitable for use above ground level, where exposed on vertical surfaces in direct                sunlight or at a temperature above 125°F. (52°C.).