felt-and-gravel roofing
See built-up roofing.
built-up roofing
Glossary
coal-tar pitch, tar
A dark brown to black hydrocarbon obtained by the distillation of cokeoven tar; softening point near 150°F (65°C); used in
General
bituminous cement
A black substance available in solid, semisolid, or liquid states at normal temperatures; composed of mixed indeterminate hydrocarbons; appreciably soluble