Microporous bitumen coated under-roofing material

Details Microporous bitumen coated under-roofing material Microporous bitumen coated under-roofing material

1980-09-25

1982-08-03

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

427186, 427245, 428150, 428283, 428291, 4283084, 4283111, 4283115, 4283155, B32B 1110, B32B 1112, E04D 120, E04D 122, E04D 512

Patent

active

043428045

ABSTRACT:
This under-roofing material for roofs to be covered with tiles, slates and the like consists of a sheet of agglomerated fibres coated on one face with a layer of bitumen just sufficient for constituting when cooled a micro-perforated structure preventing the passage of liquid by capillarity while permitting the passage or air or vapor, this material having a strength sufficient to withstand the fall of objects or personnel during its use, and being essentially liquid-tight and pervious to air and vapors.

REFERENCES:
patent: 3756895 (1973-09-01), Bellamy

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