The iSOX drainage mat consists of a closed polyethylene film with studs, on which a filter fleece is applied. The studded side with filter fleece on which the covering construction is placed, acts over the entire surface as a drainage layer with a very high water drainage capacity. The open space between the membrane and the filter fleece forms a heat and contact sound insulating air layer that additionally protects the seal against harmful thermal loads. The main areas of application are terraces and balconies.