Root Barrier to Protect Against Japanese Knotweed

Spill Response Expo blog post 1

Don’t be beaten by Japanese Knotweed!

Root barriers are a very effective and proven way of protecting structures and underground services from damage from tree roots, Japanese Knotweed and other invasive plant species. Correct installation also respects and protects trees, avoiding unnecessary felling.

The words ‘Japanese Knotweed’ bring fear to any land developer, as it is recognised that the existence of Japanese Knotweed on construction sites can have very significant cost implications, to such a degree that the financial viability of a project could be in jeopardy.  Thought to have been introduced to the UK in the late 1800s, as an ornamental plant, its growth has been phenomenal and it is now found practically the everywhere in the UK. It is highly invasive and can grow up to 100mm per day!

The cost of transporting Japanese Knotweed contaminated soil off site is prohibitively expensive and the infill sites licensed to take Japanese Knotweed contaminated soil are reducing throughout the country, as Japanese Knotweed contaminated soil must be buried beneath 15m of cover.

Thousands of homeowners, planning to sell their properties, discover that lenders are unable to grant mortgages on properties with Japanese Knotweed.

It is reported that clearing the ten acres of the Olympic Park for the London Olympics 2012 cost in the region of £70 million!

Installation of root barriers renders sites immediately available for construction. DENDRO-SCOTT™ Root Barrier is the longest established root barrier of its kind and is recognised by the Environment Agency and comes with a 50-year manufacturer product warranty, giving peace of mind. Its flexibility makes it simple to install to any shape.

A flexible root barrier, such as DENDRO-SCOTT™ Root Barrier, can be used in a variety of ways:

•    Vertically, to prevent lateral intrusion of roots and rhizomes, to protect underground services and to prevent ingress from neighbouring sites
•    Horizontally, to protect buildings and surfaces from vertical intrusion of roots and rhizomes, this includes installation below foundations
•    Services, wrapped with root barrier membrane, to protect pipes, etc.
•    ‘Cell’, to avoid the very expensive process of transportation of contaminated soil to a waste facility, licensed for Japanese Knotweed. To comply with Environment Agency guidelines on root spread of Japanese Knotweed, the quantities of spoil can be extremely significant. With a ‘Cell’, soil is retained within the site, reburied and completely sealed within a ‘Cell’ of root barrier membrane. The potential cost saving is enormous!

Root barriers are not only for large construction projects, they can be used for small domestic projects, such as laying pathways, protecting garages, extensions, etc., offering long-term protection.



Don't miss DENDRO-SCOTT™ Root Barrier on stand C4112 at Contamination Expo on 27/28 September


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