The following project proves that the applications for our expertise are very diverse. On one occasion, NPI was able to provide a solution to the problem of the highly aggressive Japanese Knotweed. In Wageningen, a housing block was seriously affected by this invasive species.
To deal firmly with this unwanted plant, earth was dug out from several gardens. 6 mm HDPE sheets were installed on the sides of the excavated ground, and a 2 mm HDPE film installed on the base of the pit. Drainage was installed on top of this and the excavated ground replaced. This created a closed basin, which was then free of Japanese Knotweed.