What is Japanese Knotweed?

Japanese Knotweed is a highly aggressive weed that can cause damage to property. With bamboo like stems and small white flowers, knot weed can grow up to 10cm per day.  The invasive weed finds weak points and masonry cracks to grow through which can cause major damage to buildings.

What Does Japanese Knotweed do?

Japanese Knotweed costs the UK economy an estimated £166 million per year for treatment and in property devaluations.

It spreads—rapidly—and it wipes out native species in its relentless progress across the land, as well as posing a serious threat to building foundations and drains. At its most prolific, Japanese Knotweed can grow 20cms in a day; its root system can go down to 3m; one plant can extend as much as 7m in every direction and it can break through tarmac and concrete.

The Solution

Geosynthetics Ltd offers the ideal solution in the form of its Knotblock^® Knotweed Barrier!

Knotblock^® is a Japanese Knotweed barrier that complies fully with the knotweed code of practice document released by the Environmental Agency.

Geosynthetics Knotblock^® provides high mechanical strength due to the high-quality raw material used and can, therefore, be laid easily without creasing. It is manufactured in large roll sizes, to minimise seam jointing as recommended in the Environment Agency’s code of practice document.

The product has been tested for microbiological resistance, as well as for resistance to rodents and roots. Due to the chemical structure – polyethylene macromolecules – it provides superior resistance against puncture and deformation from roots.

Knotblock^® will not cause any harm to the environment as it contains no plasticizers, fillers, micro biocides or other substances which could be leached out by substances in soil, water or produced by roots.