Ewald Dorken Ag

Ronald Flaig

Thomas Bachon

Jörn Schröer

Joern Schroeer

Carsten Harfmann

Rüdiger Laur

Jochen Lipps

Norbert Klingelhage

Yvonne Weeke

Michael Wolf

The invention relates to a roofing underlay (), especially one intended for use as roof cladding underlay and/or roof lining membrane, having at least one outer nonwoven layer (), at least one inner nonwoven layer () and at least one microporous membrane layer () based on at least one polyolefin plastic, wherein the membrane layer () is arranged between the outer nonwoven layer () and the inner nonwoven layer. According to the invention, it is provided that at least one further microporous membrane layer () based on a polyolefin plastic is provided between the outer nonwoven layer () and the inner nonwoven layer and the further membrane layer () is separated from the membrane layer () by a separating layer (), wherein the separating layer () is water-permeable and/or embodied as a structure made of fibers, especially nonwoven.

Roofing underlay, particularly for using as roof cladding underlay and/or roof lining membrane

A sheet (), preferably for use in the building sector, and in particular, for sealing the shell of a building, comprising a planar sheet body () that has at least one elastic layer as a sealing layer () made of a material of such elasticity and such restoring force that, when the sealing layer () is penetrated by a fastener (), the material of the sealing layer () surrounding the fastening means () encloses the fastener () and provides sealing in the region of the fastener (). Alternatively, the sheet body contains a sealing material which, upon perforation of the sheet body, is able to automatically emerge or swell to an extent sufficient to close or seal the perforation.

Sheet, in particular for use in the building sector

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Leverkusen, Germany

Ronald Flaig