Japanese Knotweed Screening – Redditch

Do you have to notify your estate agent about Japanese Knotweed?

Share This Post






We were instructed by our client – A property developer to carry out a survey within the Redditch area as Japanese Knotweed was identified on some communal grounds whereby some develop works was required. Our client was looking to build residential properties so any Japanese Knotweed present on site would need to be removed.


During our site survey, Japanese Knotweed was identified within the area of where the properties would be being built. Our technician recommended three options to our client:

  • Option 1 Dig and Dump

This ‘Dig and Dump’ method involves the excavation of all Japanese knotweed and subsequent off-site disposal at a designated landfill site.

A WAC soil test would need to be undertaken and which would determine whether the material would be classified as either ‘hazardous’ or ‘controlled’ waste by the landfill operator.

This option and quotation identifies the material to be disposed off-site as ‘controlled’ and thereby subject to the higher rate of tax for disposal.

This methodology would involve the off-site disposal of approximately 160 tonnes, the first 1m of soil would be disposed off at the higher rate of tax.

  • Option 2 Cell Burial

This would involve the excavation of the knotweed and placed onto a biosecurity barrier whilst the main cell is constructed. The excavated knotweed is encapsulated in a heat sealed, triple ply polyethylene impermeable sheet – with no access to sunlight, water or nutrients.

The knotweed essentially rots away under the ground.

The location of the cell will be determined by the development plans.

  • Option 3 Screening

Our ‘Zero to Landfill’ solution includes for the excavation, screening, separation and relocation of the Japanese Knotweed on site using our Environment Agency (EA) approved methodology.

The screening process removes the Japanese Knotweed material from the soil and separates the subsequent arisings into two piles; one contaminated Japanese knotweed for incineration and one low-risk soil.

This approach removes the need to send controlled waste to licensed landfill and keeps costs to a minimum.

The time needed to process the stockpile depends on the composition and consistency of the material. Once screening has finished we will transport the knotweed rhizomes and vegetation to a waste transfer centre for onward incineration of the Japanese knotweed.

The screened soils can then be used on site, preferably in a landscaped area or used as backfill for the new access road.

Following this survey and the options presented to the client, the client agreed and proceeded with Option 3  – Screening.



Knotweed Services UK offer their insurance backed guarantees through Guarantee Protection Insurance Ltd (GPI). GPIs primary and founding product was IBG’s and they are in the industries leaders in Japanese Knotweed insurance. The package we recommended for this project is the is “designed to provide cover in the event that the insured remedial works fail, during the period of insurance, and the contractor has ceased to trade and is unable to honour claims on the written guarantee.” (GPI, 2017).

*Taking out an IBG is optional. However, if you are in the process of selling, an IBG is a requirement from the mortgage lenders.

Are your pictures on a different device? Don’t have pictures available at the moment? No problem! Sending pictures to us is EASY at ANYTIME. You can contact us via the following:

SMS Text






1 Step 1
Fill in the form below, attach your pictures and we'll let you know if the plant in your picture is Japanese Knotweed.

Please choose from one of the following:

By sending this form I consent to let Knotweed Services (UK) Ltd collect and store the personal data contained in the above form submission, so that they can respond to my enquiry. 

FormCraft - WordPress form builder

More To Explore

Autumn is upon us and today we bring you a story about a Japanese knotweed removal Hereford couple, that we first had …

Site Size: 2500 m2 BACKGROUND Knotweed Services (UK) Ltd were contacted by the client to organise a site survey of a development site. …

Knotweed Services (UK) Ltd were instructed to carry out a large scale Japanese Knotweed screening job in The South East. The Japanese …

We use cookies to give you the best online experience. We do not pass over any personal information to 3rd parties via our cookies. If you do not accept cookies, our website may not display or function correctly.

Privacy Settings saved!
Privacy Settings

When you visit any web site, it may store or retrieve information on your browser, mostly in the form of cookies. Control your personal Cookie Services here.

These cookies are necessary for the website to function and cannot be switched off in our systems.

In order to use this website we use the following technically required cookies
  • wordpress_test_cookie
  • fc_sb_1

Decline all Services
Accept all Services