Perforated roofing material and a method of manufacturing the sa

Details Perforated roofing material and a method of manufacturing the sa Perforated roofing material and a method of manufacturing the sa

1988-06-29

1989-10-17

Hess, Bruce H.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

428141, 428468, 428489, B32B 310

Patent

active

048746525

ABSTRACT:
A perforated web-like bituminous roofing material comprising a perforated, bituminized carrier, at the side facing, in the condition of use, the roof area to be coated, is provided with a metal foil leaving clear the perforations in the bituminized carrier. The roofing material can be manufactured by finishing one side of a perforated bituminized carrier with fine sprinkling material and coating the other side with an imperforate metal foil, and subsequently removing the metal foil at the perforations.

REFERENCES:
patent: 2021716 (1935-11-01), Douthett
patent: 2353680 (1944-07-01), MacNutt
patent: 4287248 (1981-09-01), Gessner et al.

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