Built-up roofing using sulfur asphalt

Details Built-up roofing using sulfur asphalt Built-up roofing using sulfur asphalt

1975-10-07

1979-01-16

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

106274, 428141, 428281, 428291, 428323, 428489, 428920, 428921, 10628732, B32B 1110, B32B 1102

Patent

active

041350227

ABSTRACT:
The disclosure describes built-up roofing having improved resistance to spreading of fire, fabricated from two or more layers of felt impregnated with asphalt based saturant with asphalt based coating spread on top of each felt layer; the saturant asphalt or coating asphalt or both are blends of 90 - 45% asphalt with 10 - 55% sulfur. The roofing is built-up in the conventional manner by "mopping" fluid asphalt based coating onto felt layers impregnated with asphalt based impregnant. A protective layer of inert mineral aggregate (e.g. gravel) optionally covers the top coating.

REFERENCES:
patent: 256368 (1882-04-01), Poschel
patent: 1026855 (1912-05-01), Ellis
patent: 2326724 (1943-08-01), Fasold et al.
patent: 2490430 (1949-12-01), Greider et al.
patent: 3096196 (1963-07-01), Bettoli
patent: 3721578 (1973-03-01), Bennett et al.
patent: 3769078 (1973-10-01), Roth et al.

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