Tencate Dendro Root Barrier

Japanese Knotweed (Fallopia Japonica) on a development site or residential plot can have huge financial implications. Its invasive root system and strong growth can damage concrete foundations, buildings


Tencate Dendro Root Barrier is used in a variety of ways to contain Japanese Knotweed:

  • Vertically to prevent the lateral development of Rhizomes and to protect drains and/or to prevent ingress from neighbouring sites
  • Horizontally to protect buildings and paved surfaces
  • A combination of the above methods
  • To avoid the very expensive process of transportation of contaminated soil to a licensed tip (resulting from excavation to obtain formation levels). Instead soil is retained within the site, re-buried in another location and totally sealed within a ‘cell’ created with the DENDRO Root Barrier

The use of the DENDRO Root Barrier is recognised by the Environment Agency as a solution to contain Japanese Knotweed prior to construction. Normally a development site infested with Japanese Knotweed is only available after 3–4 years due to the need to carry out a long-term Herbicidal control programme. Even after this period, research has shown that there is a high risk that re-emergence of Japanese Knotweed could occur once excavation commences. Installation of the DENDRO Root Barrier makes a development site immediately available for use with no risk to structures, roads or drains.