Techfol

TECHFOL a series of dimpled membranes designed for special structures of floors and walls, when they are designed as drainage structures (diaphragm walls and foundation slabs) to eliminate destructive hydrostatic pressure that is caused by a deep foundation of a construction object, for example, multilevel garages, and structures with high ground water table or rainwater level. The protection lies in the fact that the geomembrane laid, or rather its profiles (dimples) become a “mould” filled with concrete, thereby forming (after curing) a drainage structure.

TECHFOL geomembrane is supplied in rolls. Its installation is done by proper laying on the protected surface. The membrane shall be overlapped. Each of joined sheets shall overlap by a minimum of one row of dimples. The installation process must be scheduled in such a way as to reduce membrane cutting, to avoid damage to the dimples. The membrane can be laid along as well as across the covered surface without losing its hydraulic and mechanical properties. When the design specifies to obtain a tight seal joint of sheets, the overlap shall be performed in such a way that a minimum of three rows of dimples of each of joined sheets shall overlap and a minimum one path of butyl tape is placed within the overlap area. Before laying the membrane, previously completed construction works have to be accepted. When using our geomembranes, always follow the installation guidelines contained in the work technical design.