Title:
ROOFING UNDERLAYMENT
Document Type and Number:
WIPO Patent Application WO2001040568
Kind Code:
A3
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.
Inventors:
KIIK MATTI
BRYSON MICHAEL L
TOBIN ROBERT J
BRYSON MICHAEL L
TOBIN ROBERT J
Application Number:
PCT/US2000/032270
Publication Date:
October 03, 2002
Filing Date:
November 21, 2000
Export Citation:
Assignee:
ELK CORP DALLAS (US)
International Classes:
A47G27/04; B32B5/26; B32B13/14; B32B15/14; B32B17/02; B32B27/06; C03C17/38; C03C17/40; C03C25/48; D06N3/04; D06N7/00; E04D5/10; E04D12/00; (IPC1-7): D06N7/00; B32B5/26; D06N3/04; E04D12/00
Foreign References:
| US5965257A | 1999-10-12 | |||
| US5717012A | 1998-02-10 | |||
| DE19729533A1 | 1999-01-14 | |||
| GB1228592A | 1971-04-15 |
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