Patent Number: 6,308,482

Title: Reinforced roof underlayment and method of making the same

Abstract: A reinforced roofing underlayment positioned between a roof support structure and an overlayment in order to provide a waterproof barrier for the roof structure. The roofing underlayment including an interwoven scrim comprising a mesh of interwoven strands of thermoplastic having a tensile strength sufficient to resist tearing when exposed to tensile loads from various directions. The interwoven scrim having a layer of waterproof material affixed to at least one side of the scrim in order to provide a weather-resistant barrier which prevents moisture and other external elements from passing through the roofing underlayment. The waterproof material is preferably a layer of thermoplastic film which is co-extruded over both sides of the scrim. The roofing underlayment may also include a slip-resistant outer surface in order prevent a person installing the roofing underlayment from slipping while walking on the roofing underlayment. Furthermore, the roofing underlayment may include a radiant barrier for reflecting solar energy and thereby reducing the transmission of radiant heat through the roofing underlayment. The configuration of the present invention provides a reinforced roofing underlayment having an increased tensile strength to resist tearing as well as an increased resistance to deterioration from exposure to external elements.

Inventors: Strait; Mark C. (Simi Valley, CA)


International Classification: B32B 27/12 (20060101); D06N 7/00 (20060101); D06N 5/00 (20060101); E04D 12/00 (20060101); E04B 007/00 ()

Expiration Date: 10/30/2018