Abstract: A bituminous roof covering material, particularly suitable for use as first layer in a multilayer roof covering system which is applied while adding heat. The material comprises a carrier provided on both sides with a bituminous layer and with a layer formed by a perforated metal foil. According to the invention, the carrier and the bituminous layers applied thereto on both sides are closed layers without perforations, and the bituminous layer interposed between the perforated layer and the carrier consists of adhesion-active bituminous material.
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.
Type:
Grant
Filed:
August 17, 1989
Date of Patent:
July 10, 1990
Assignee:
B. V. Asphalt- en Chemische Fabrieken Smid & Hollander
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.
Type:
Grant
Filed:
June 29, 1988
Date of Patent:
October 17, 1989
Assignee:
B.V. Asphalt-en Chemische Fabrieken Smid and Hollander