Rubberized roof underlayment

a technology of roof and underlayment, which is applied in the direction of transportation and packaging, roads, traffic signals, etc., can solve the problems of product stickyness, water infiltration not prevented, and other prior art shingle underlayment products also suffer from the same problems
US20070071946A1Inactive Publication Date: 2007-03-29OWENS CORNING INTELLECTUAL CAPITAL LLC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
OWENS CORNING INTELLECTUAL CAPITAL LLC
Publication Date
2007-03-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

An underlayment product comprises a fibrous mat having an upper surface and a lower surface. A rubberized asphalt coating is applied to the lower surface of the fibrous mat and extends at least partially into the fibrous mat. An oxidized asphalt coating is applied to the upper and lower surfaces of the fibrous mat generally encapsulating the fibrous mat including the rubberized asphalt coating provided on the lower surface of the fibrous mat. The oxidized asphalt layers may be coated with a release layer such as talc, granules or a polymer.
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Description

TECHNICAL FIELD

[0001] The present invention relates to roof underlayments and more particularly, to a heavyweight, underlayment product which utilizes a rubberized asphalt layer. BACKGROUND INFORMATION

[0002] An underlayment material is commonly used in a number of roofing applications as well as other underlayment situations. The typical product utilized in roofing underlayment is commonly referred to as “tar” of “felt” paper. The traditional “tar paper” is an asphalt impregnated paper product which is sold in a roll; unrolled on a roof; cut to length; and fastened to the roof utilizing staples or nails. Although tar paper is inexpensive, it does not seal nail holes through the paper and thus does not prevent water infiltration. In addition, once the felt is rolled out, it absorbs water and once wet, it wrinkles and expands, and must be allowed to dry out before covering with shingles. Other prior art shingle underlayment products also suffer from the same problems.

[0003] Accordi...

Claims

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