Roof waterproofing membrane TGV 21

protectiondrainagefor patios

Separation and slip sheets, as loosely laid tarps or sheets, protect the waterproofing from tensile and shear forces. In the case of chemically incompatible materials (e.g. single soft PVC sheets on bitumen), a neutral separation layer has to be installed. Only vapour permeable membranes (e.g. TGV 21), and no vapour barriers, should be used over an XPS insulation in inverted roof constructions, in order to avoid condensation within the insulation. Air and vapour permeable membrane; water-repellent; thermally bound; made of 100 % polypropylene; can be used as a separation layer and as protection against small particle infiltration, e.g. on inverted green roofs, as metal protection against harmful effects of adjoining materials, etc. Chemically and biologically neutral; compatible with bitumen and polystyrene; resistant to acids and alkalis; permeable to vapour (Sd < 0.01 m); colour: black; thickness: ca. 0.55 mm; weight: ca. 80 g/m2.