초록 ▼

A bituminous roofing membrane, and method of manufacture, is disclosed having a reinforcing mat sandwiched between top and bottom layers of a tacky polymer modified bitumen. The leading edge portion of the top layer is provided with a layer of roofing granules. A track of adhesive is provided on the

A bituminous roofing membrane, and method of manufacture, is disclosed having a reinforcing mat sandwiched between top and bottom layers of a tacky polymer modified bitumen. The leading edge portion of the top layer is provided with a layer of roofing granules. A track of adhesive is provided on the roofing granules. The trailing edge portion of the top layer is provided with a layer of non-slip plastic film. A release sheet is applied to the bottom layer of the membrane to prevent engagement of the top and bottom layers with one another when the membrane is rolled for storage or shipment. In use, upon removal of the release sheet, the membrane is secured to the roof with the leading edge portion constituting a starter strip for receiving thereon the first row of roofing shingles, and the trailing edge portion constituting an underlayment for receiving thereon successive rows of roofing shingles.

대표청구항 ▼

A bituminous roofing membrane comprising: first and second layers of a tacky polymer modified bitumen; a reinforcing mat layer sandwiched between and in contact with said first and second bitumen layers to form first and second oppositely exposed surfaces of said membrane; one of said first and seco

A bituminous roofing membrane comprising: first and second layers of a tacky polymer modified bitumen; a reinforcing mat layer sandwiched between and in contact with said first and second bitumen layers to form first and second oppositely exposed surfaces of said membrane; one of said first and second exposed surfaces constituting a non-weather surface adapted to be secured to the roof; the other one of said first and second exposed surfaces having a leading edge portion and a trailing edge portion; said leading edge portion having a protective layer of roofing granules constituting a weather exposed surface, and further having a track of pressure sensitive adhesive on said roofing granules extending in the same direction as said leading edge and spaced inwardly of said edge; the exposed surface of said trailing edge portion having a layer of non-slip plastic film; whereby when said membrane is secured to the roof, said leading edge portion constitutes a starter strip for receiving thereon the first row of roofing shingles, and said trailing edge portion constitutes an underlayment for receiving thereon successive rows of roofing shingles.