Perma-Seal 8 Geo Drain Membrane 40m²

Perma-Seal 8 Geo-Drain is a twin sheet 8mm stud cavity drain membrane with Geotex, a filter fabric, thermally welded to the studded face. It is used externally below ground in conjunction with a land drain or French drain and a bitumen waterproofing material.



The filter fabric allows water to pass into the cavity created by the 8mm studs but will not allow fines or sediments to pass into the cavity. Any water entering the cavity immediately de-pressurises and falls down to the perforated pipe (land drain or French drain) which is situated below floor level which in turn drains the water away to a suitable drainage point. The filter fabric should continue around the perforated pipe to also protect it from fines and sediments.