ROOFING UNDERLAY ESPECIALLY ENVISAGED FOR USE AS UNDER-TILE AND/OR SARKING

摘要

The invention relates to roofing underlay (1), particularly for using as roof cladding underlay and/or roof lining membrane, comprising at least one outer nonwoven layer (2), at least one inner nonwoven layer (3) and at least one microporous membrane layer (4) based on at least one polyolefin plastic, the membrane layer (4) being arranged between the outer nonwoven layer (2) and the inner nonwoven layer. According to the invention, at least one other microporous membrane layer (5) consisting of a polyolefin plastic is provided between the outer nonwoven layer (2) and the inner nonwoven layer, and the other membrane layer (5) is separated from the membrane layer (4) by means of a separating layer (6), the separating layer (6) being water-permeable and/or embodied as a fibrous structure, particularly a nonwoven structure.