Back to results
US 6,641,896 B2Granted
Water resistant fire retardant roof underlayment sheet material
AssigneeThe Garland Company, Inc.
InventorsFred Fensel, Rob Justus
Life of this patent
Estimating the term…
Abstract
A sheet material is useful as a waterproof underlayment for a roof of a structure. The sheet material has upper and lower surfaces and comprises a web of reinforcing mat comprising fire-resistant fibers and a continuous non-porous matrix of water-resistant modified bitumen saturating the web of reinforcing mat, wherein the modified bitumen is self-adhesive.
Claims13
A sheet material useful as a waterproof underlayment for a roof of a structure, the sheet material having an upper and a lower surface and comprising:
- a web of reinforcing mat comprising fire-resistant fibers and filler;
- and
- a continuous non-porous matrix of water-resistant composition saturating the web of reinforcing mat;
- wherein the water-resistant composition is self-adhesive and consists essentially of modified bitumen, tackifiers and processing oil.
1 more element
Dependencies are inferred from the claim text.