Geotextile made of polypropylene thread using a needle felting method, with a surface weight of 150 g/m2, without heat treatment for filtering and separating purposes on extensive green roofs.
The VL fleeces are geotextiles made of polypropylene thread using a needle felting method. Due their excellent mechanical properties VL geotextiles are suitable for separating-, filtering-, protecting-, and water retention functions on green roofs. VLF-150 is intended to act as a filter between the growing media and the drainage layers. Besides allowing fast water drainage it is designed to filter fine particulates out of the substrate or other bulk materials and also prevent obstruction of the outlet. It is also can be used as a separating layer between two incompatible materials.