Fire-rated roofing system
AssigneeCarlisle Intangible Company
InventorsMatthew John Leatherman, Brian Gish
Life of this patent
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Abstract
A fire-resistant polymeric membrane includes a polymer layer such as PVC, TPO, or EPDM affixed to a carbon fiber composite. The carbon fiber composite includes one or two layers of non-woven carbon fibers and at least one of an inert fiber mat or a metal foil layer, wherein the metal foil layer has a melting temperature of at least about 660° C. The present invention also provides an underlayment, wherein the underlayment is formed from one or more fibrous carbon layers affixed to at least one of an inert fiber mat or a metal foil having a melting temperature greater than 660° C.
Claims8
A fire-resistant composite comprising:
- a first layer comprising a flexible polymeric sheet;
- and
- a second layer, the second layer comprising a first carbon fiber sheet and a second carbon fiber sheet with an inert fiber mat positioned between the first carbon fiber sheet and the second carbon fiber sheet.
A fire-resistant roofing underlayment comprising:
- at least one carbon fiber layer;
- and
- at least one of an inert fiber mat or a metal foil layer being coextensive with the carbon fiber layer, the metal foil layer having a melting temperature greater than about 660° C.;
- and
- wherein the at least one carbon fiber layer has a basis weight of at least 3 ounces per square yard.
A roof structure comprising:
- a roof deck covered with a fire-resistant composite membrane comprising:
- a first layer comprising a flexible polymeric sheet;
- and
- a second layer affixed to the first layer, the second layer comprising at least one carbon fiber sheet and at least one of an inert fiber mat or a metal foil, the metal foil having a melting temperature above about 660° C.
Dependencies are inferred from the claim text.