Roofing underlayment
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jul 1, 2003
Grant Date -
N/A
app pub date -
Sep 15, 2000
filing date -
Nov 30, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention relates to a roofing underlayment system comprising two layers of a coated structural article which comprises a substrate having an ionic charge coated with a coating having essentially the same ionic charge or one layer of such coated structural article in combination with one layer of felt material. The coating of the coated structural article consists essentially of a filler material and a binder material wherein the binder material bonds the filler material together and to the substrate and wherein the coating does not bleed through the substrate. The roofing underlayment system of the present invention can impart a Class B or better (Class A) fire rating to a roof assembly.
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Cited Art Landscape
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