Japanese knotweed removal
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Japanese knotweed removal

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The problem with Japanese knotweed

Japanese knotweed (Fallopia Japonica syn. Polygonum cuspidatum) is a highly invasive non-native weed that can damage foundations and driveways, as well as putting a stop to mortgage applications and construction development plans. First introduced to the UK from Japan in the 1840s as an ornamental plant, Japanese knotweed is now widespread throughout the UK and can be found as a wayside weed and in many private properties across the country. In spring, the bamboo-like stems grow at a rapid rate, reaching up to 2 metres in height. In summer, the plant produces creamy white flowers. Don’t be fooled by its beauty, as Japanese knotweed can quickly dominate the landscape, suppressing all other growth and damaging properties. Over the winter, the above ground growth dies back but the underground rhizome root system remains alive, ready to grow again in spring.

Mortgages lenders require a Japanese knotweed management plan with an insurance backed guarantee to be in place before they will lend on properties with this prolific perennial. Knotweed has the ability to cause significant damage to tarmac, concrete, paving slabs and foundations of properties. Eradication and Japanese knotweed removal requires expertise. It is very difficult to remove by hand, because the rhizome root system extends deep into the ground. Chemical treatment methods require expert application in order to kill Japanese knotweed. There are also various legal considerations when dealing with Japanese knotweed. Private nuisance claims can be brought against a landowner who allows knotweed to spread into adjoining land. Under the provisions made within the Wildlife and Countryside Act 1981, it is an offence to cause Japanese knotweed to grow in the wild.


Why choose Environet for your Japanese knotweed removal

We pride ourselves on delivering excellent customer service to all of our clients by offering a range of Japanese knotweed removal methods for both large scale development sites and residential properties. We eradicate and kill Japanese knotweed and control the spread of the weed. All of our services are provided with insurance backed guarantees for up to 10 years underwritten by an A-rated insurer at Lloyd’s and recognised and accepted by the majority of the UK's leading banks and building societies for financial lending purposes. We've developed eco-friendly ways of removing Japanese knotweed, such as our Xtract™ method, and are continually researching ways to improve the process. We believe in eco-innovation and continue to sponsor the Schools Eco-Innovation Awards Scheme, supported by Kevin McCloud, MBE.


Latest Japanese knotweed news

Japanese knotweed canes in the winter

Environet's Reflection on 2016

Another year has passed, making it over 20 years that we've now been in business.  

We've continued to grow, not only on the knotweed front. I'm pleased to say two of our employees have given birth this year, so we now have two beautiful babies being trained up on how best to tackle knotweed. There must be something in the air, as a further two employees are expecting babies in 2017, congratulations to all of them.

Japanese knotweed on a construction site

Your Build: Japanese knotweed - a guide for the self-builder

Environet are featured in the latest issue of Your Build, published in December 2016.

Nic Seal, Managing Director of Environet UK, answers some of the frequently asked questions about Japanese knotweed. Some of the common questions concerning knotweed are: is knotweed covered under general insurance policies, what is the best way to tackle Japanese knotweed on a building site, and why is knotweed such a problem. 

Japanese knotweed canes in the winter

Building Engineer: Japanese knotweed - winter treatment

Environet are featured in the latest issue of Building Engineer, published in December 2016.

Environmental scientist and Managing Director Nic Seal speaks to Building Engineer and explains how best to tackle Japanese knotweed on construction sites, dispelling the myth that knotweed can only be eradicated in the summer.

Read the full article here.

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