Rubberized roof underlayment

Details Rubberized roof underlayment Rubberized roof underlayment

E - Fixed Constructions

04

D

E04D 5/02 (2006.01) E04D 12/00 (2006.01)

Patent

CA 2728709

An underlayment product comprises a fibrous mat having an upper surface and a lower surface. A rubberized asphalt coating is applied to the lower surface of the fibrous mat and extends at least partially into the fibrous mat. In one heavyweight underlayment, an oxidized asphalt coating is applied to the upper and lower surfaces of the fibrous mat generally encapsulating the fibrous mat including the rubberized asphalt coating provided on the lower surface of the fibrous mat. The oxidized asphalt layers may be coated with a release layer such as talc, granules or a polymer. In a lightweight underlayment, a split release sheet or facer segmented to provide a releasable selvedge edge and incorporating a high traction polymer on its surface is applied to the rubberized asphalt.

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