Under tile sheet for waterproofing roofs of buildings having anti-slip properties

摘要

The present invention relates to an under tile sheet (100) for waterproofing a roof of a building. The sheet comprises: - a reinforcement layer (10) in fibrous material having a first (1) and an opposite second (2) faces; - a first (20) and a second (30) water-proof membrane connected to the first face (1) and the second face (2), respectively; - a first (40) and a second (50) layers in fibrous material connected to said first (20) and second (30) impermeable membranes, respectively; the first membrane is interposed between the reinforcement layer (10) and the first fibrous layer (40), and the second membrane is interposed between the reinforcement layer (10) and the second fibrous layer (50). The sheet is characterized in that at least one of such first (40) and second (50) fibrous layers comprises, on a face (41) opposite a further face (42) adjacent to one of the impermeable membranes, a multiplicity of protuberances (60).