Patent ID: 9702148
Date: 2017-07-11
CPC Classifications: E04D,Y10T

Claim:
1. An underlayment membrane comprising: a fibrous mat having an upper surface and a lower surface extending longitudinally between first and second ends; a rubberized asphalt coating applied to the upper surface of the fibrous mat and extending at least partially into said fibrous mat, said rubberized asphalt coating comprising 0.5% to 12% radial or linear rubber or polymer, 0% to 70% filler, and 48% to 98% asphalt; an oxidized asphalt coating applied to said lower surface of said fibrous mat; and a split facer sheet applied directly to said rubberized asphalt coating applied to the upper surface of the fibrous mat to define a top portion of the underlayment membrane, the split facer sheet comprising a polymeric film segmented along a longitudinal axis to separate the polymeric film into first and second coplanar segments of the split facer sheet, the first segment comprising a removable selvedge edge segment removable to expose an underlying portion of the rubberized asphalt coating to allow partial overlapping of successive courses during installation and the second segment comprising a plurality of spaced apart and distinct traction surface regions applied to an upper side of the polymeric film that are softer than a material substrate of the split facer layer so as to reduce if not eliminate applicator slippage during installation.