Abstract: The present invention provides a waterproofing membrane for use on inclined surfaces. The membrane is fabricated from one or more layers of flexible sheet material preferably consisting of woven or nonwoven synthetic polymers of polypropylene. The membrane has a top surface and a bottom surface, where the bottom surface is intended to face the inclined surface. A skid resistant pattern of polymer elements is applied to the top surface of the membrane. The polymer has a Tensile Modulus <15 MPa (ASTM D638, 23C, 50 mm/min), a Tensile Yield Elongation >50% (ASTM D638, 23C, 50 mm/min, and a Shore A Hardness (ASTM D2240, 23C, 0 sec)<90. In a preferred embodiment the polymer elements are made from polyvinyl chloride polymer with a Tensile Modulus <7 MPa (ASTM D638, 23C, 50 mm/min), a Tensile Yield Elongation >50% (ASTM D638, 23C, 50 mm/min, and a Shore A Hardness (ASTM D2240, 23C, 0 sec)<75.

Abstract: The present invention provides a waterproofing membrane for use on inclined surfaces. The membrane is fabricated from one or more layers of flexible sheet material preferably consisting of woven or nonwoven synthetic polymers of polypropylene. A skid resistant pattern of polymer elements is applied to the top surface of the membrane. The polymer has a Tensile Modulus<15 MPa (ASTM D638, 23C, 50 mm/min), a Tensile Yield Elongation>50% (ASTM D538, 23C, 50 mm/min, and a Shore A Hardness (ASTM D2240, 23C, 0 sec)<90. In a preferred embodiment the polymer elements are made from polyvinyl chloride polymer with a Tensile Modulus<7 MPa (ASTM D638, 23C, 50 mm/min), a Tensile Yield Elongation>50% (ASTM D638, 23C, 50 mm/min, and a Shore A Hardness (ASTM D2240, 23C, 0 sec)<75. The pattern of polymer elements may be applied directly on the top surface of the membrane or produced on one side of a carrier sheet which is attached to the top surface of the membrane.

Abstract: There is provided a sheet material having a walking surface with high slip resistance. The sheet material has a flexible structural layer laminated to a mesh layer which has interconnected reinforced strands and protruding nodes to impart a high coefficient of friction. The high coefficient of friction of the sheet material provides a roofing underlayment which is safe to walk upon in dry, wet or dusty conditions, and on steeply sloped surfaces. The sheet material may also be used as an industrial wrapping material or a fabric.

Abstract: There is provided a sheet material having a walking surface with high slip resistance. The sheet material has a flexible structural layer laminated to a mesh layer which has interconnected reinforced strands and protruding nodes to impart a high coefficient of friction. The high coefficient of friction of the sheet material provides a roofing underlayment which is safe to walk upon in dry, wet or dusty conditions, and on steeply sloped surfaces. The sheet material may also be used as an industrial wrapping material or a fabric.