It is important that the subsurface of a hockey field is stable and water permeable. This is why NPI was asked to install film for the drainage system of a hockey field in Leerdam.
Once the ground had been properly levelled, a watertight film layer was created using 0.50 mm LDPE film. White protective felt was subsequently laid on top of the film to protect the upper surface. The drainage pipes were installed on top of this, and the entire assembly was covered with a layer of sand and finally the top layer of artificial turf.
The three huge LDPE sheets were prefabricated at our production location in Tzummarum and welded together on location. No less than 17 fittings were installed in the side wall. These were connected to the drainage tubes.
In this way, the hockey field was provided with a good drainage system that keeps the field free of excess water!