Arborist and Tree Surgeon Cardiff with Japanese Weed Removal

Arborist and Tree Surgeon Cardiff with Japanese Weed Removal

Treatment Options, Guarantees & The Law

  1. HAP Herbicide application program - applying herbicides to the leaves of injecting into stems over several years.
  2. Excavation & removal to landfill - Quick but can be expensive.
  3. Excavation & relocation on site followed by HAP.
  4. Excavation & burying on site or sealing with a specialist membrane.

Buying/Selling Property with Japanese Knotweed

If you are buying or selling a property that has Japanese knotweed within its boundaries or on land adjacent to your property some lenders may require a comprehensive survey (JKMP) to support any application for a mortgage.

  • This is a detailed survey/report that is usually required to support an application for mortgage funding by some building societies/banks or to support a building /planning application.
  • We will carry out a detailed survey of your site.
  • Produce a site plan with photographs.
  • Confirm and describe the level of contamination on the site and off the site.
  • The size, location and number of stands, proximity to water, map distances to buildings.
  • We will carry out visual surveys of the adjacent sites to identify potential encroachment.
  • We will advise of the risk of not taking the necessary action to control the plants.
  • We will recommend the most suitable treatment option and program specifying what materials/herbicides to be used, when and by what method and the cost in accordance with the code of conduct recommended by the Environment Agency & Natural Resource Wales

It is important to establish what type of report and insurance backed guarantee is required by the lender. There may be a cost involved carrying out a survey and producing comprehensive Japanese knotweed Management Plan.

The Royal Institute of Chartered Surveyors “RICS”.

The Royal Institute of Chartered Surveyors “RICS” has produced an information paper entitled 'Japanese Knotweed and Residential Property'.

The RICS has tried to clarify the situation that lenders have towards properties with Japanese Knotweed. Many residential mortgage lenders are not keen to lend on properties affected with Japanese Knotweed but may consider applications providing the purchaser or seller can prove that there is a commitment to adequately fund an appropriate treatment program. The production of a Japanese knotweed Management Plan based on a survey can establish the level of risk as specified by the RICS table below.

Lowest risk

CATEGORY1 - Japanese knotweed was not seen on the property surveyed, but it can be seen on a neighbouring property or land where it was more than 7 meters away from the boundary.

CATEGORY 2 - Japanese Knotweed was not seen within the boundaries of this property, but it was seen on a neighbouring property or land. Here, it was within 7 meters of the boundary, but more than 7 metres away from the habitable spaces, conservatory or garages of the subject property.

CATEGORY 3 - Although Japanese Knotweed is present within the boundaries of the property, it is more than 7 metres from a habitable space, conservatory and garage. If there is damage to out buildings, associated structures, paths and boundary walls and fences it is minor.

Highest risk

CATEGORY 4 - Japanese Knotweed is within 7 metres of a habitable space, conservatory and /or garage, either within the boundaries of this property or in a neighbouring property or space; and or Japanese Knotweed is causing serious damage to outbuildings, associated structures, drains, paths, boundary walls and fences etc. Whatever the level of contamination we have a successful track record controlling Japanese Knotweed in a variety of situations

Which is the right treatment option for me?

Treatment options depend on certain key factors such as: if there is no immediate construction planned or any urgent pressing need to remove the Japanese Knotweed. Then it can be controlled with a Herbicide Application Program (HAP). Some lenders are quite happy to lend funds for mortgages as long as the purchaser or in some cases vendor has made a commitment and a HAP is in place and will be carried out.

Treatment Options

Herbicide Application Program (HAP)

The HAP involves treating the “JK” on site with a selection of appropriate herbicides at regular intervals over the next 3 growing cycles. – Although you will see signs of deterioration after the first application in year one.

The overall time to control the plants depends at what time of the year the 1st application of the program is made. 3 year treatment program with a 2 year guarantee. (5 Year program) The guarantee can be extended by 5 or 10 years with 1 monitoring visit in each of the guarantee years.

Control with herbicide is also favoured by the Environment Agency. A HAP treatment plan is the preferred option as it avoids the nuisance and costs excavating, transporting contaminated waste and transferring the problem to Knotweed Licensed landfill sites.

A range of appropriate herbicides will be either sprayed onto or injected into the plant itself. The Herbicide will be absorbed by the plant and penetrate the roots or rhizome system which is the key area for the eradication of Japanese knotweed. Treatment near water may require a permit to use herbicide near water from the Environment Agency

Cutting Knotweed will not eradicate it. The correct application of herbicide over a sustained period will exhaust the rhizome system and reduce the plants ability to regenerate itself.

During the treatment program new shoots will appear as the plants respond to the treatment program. This is natural and allows us to apply more herbicide to the plant root or rhizome system and gradually weaken the plants ability to regenerate.

Do not:

  • Cut or trim green or treated Japanese Knotweed plants.
  • Treat the Japanese Knotweed yourself with herbicide.
  • Disturb the ground within 2-3 m of any Japanese Knotweed plant.
  • Dispose of any Knotweed material including soil from within 5 m of any knotweed plant or previously contaminated area, off site.
  • Allow access/ traffic across the area of contamination.


  • Leave the Japanese knotweed alone and allow our herbicide to work.
  • Cut down the dead canes between January & February and allow them to dry out on site.
  • Quarantine the area of contamination to prevent traffic spreading the plant material across your property.

Excavation and Removal

If you need fast removal of the Japanese Knotweed from the site in question.

The process is to excavate the plants and the surrounding contaminated soil – tracking and excavating the roots that may extend several metres from the visible edge of the contamination possibly down to a depth of 2+ metres.

We can reduce the amount of material that has to be removed if the excavation and rhizome tracking is closely supervised to reduce the soil excavated. All rhizomes must be tracked, followed and removed to stop any re growth appearing.

The soil and plant debris (which is classified as contaminated waste) must then be transported to a licensed site using licensed contaminated waste haulage contractors. Backfilling – you may incur extra cost purchasing & transporting soil to the site to backfill the excavated area. It is important to point out that ground that has been contaminated with Japanese knotweed remains classified as contaminated waste and can only be handled and accepted by suitable registered waste carriers and disposed of at specialist licensed landfill sites incurring landfill tax charges. Excavation and disposal at a licensed Landfill site. As the nation is running short of landfill the Government wants to discourage Knotweed being put into Landfill and has levied a tax of £85 per ton for JK waste on top of the cost of haulage and excavation.

Supervision of excavation and removal using staff and resources supplied by the client.

We can be on site to supervise the excavation of Japanese Knotweed plant and rhizome material and contaminated soil using the appropriate qualified manpower and equipment supplied by the client. We will ensure that all procedures are followed in line with the Environment Agency Code of Practice for the Control of Japanese Knotweed.

Excavate - relocate on site and treat with HAP

The plant material and contaminated soil is excavated and re located on the current site, the area is quarantined and fenced off to prevent casual foot traffic. This quarantined contaminated area is then treated with an appropriate HAP without the cost of transporting and landfill fees. We can carry this work out or supervise the client’s resources in carrying it out.

Protective Membranes to prevent encroachment

In certain circumstances where there is contamination on an adjacent site it may also be prudent to dig down and install a specialist Japanese Knotweed proof membrane to prevent the rhizome (roots) spreading. The area protected by the membrane would then be treated with regular monitoring and a HAP. Until the contamination on the adjacent site has been eventually brought under control.

Guarantees and transfer of guarantees to new owners

Guarantees have to be confirmed at the start of the program. We can supply 5 or10 year guarantees and if required Insurance backed guarantees. IBG.  A third party insurer underwrites the guarantee we place on our work.

What happens when I sell my property? - Transferring programs and guarantees.

The Japanese Knotweed Survey & Management -Treatment Plan, the treatment program & relevant guarantee can be transferred to the purchaser/ new owner.

Encroachment and the law. Japanese Knotweed growing on adjacent properties.

The presence of Japanese Knotweed on adjacent property/ land has the potential for contamination across the boundary line. If Japanese Knotweed spreads from one property to another the relevant law is of private nuisance which is “an act or omission which is an interference with, disturbance of or annoyance to a person in the exercise of the enjoyment of his ownership or occupation of land.”

If your property is affected by knotweed because of encroachment the landowner of the adjacent property could be held responsible. It is not illegal to have knotweed on your land it is illegal to allow it to spread.

All landowners, even Councils, Network Rail and farmers have a legal obligation to control the spread of Japanese Knotweed from their land to adjacent properties.

Network Rail has recently lost a court case with a private household.  Read here

Taylor Total Weed Control Ltd carries significant public and product liability insurance. Copies of which can be forwarded to you.

Taylor Total Weed Control Ltd is registered with the Environment Agency under the carriage of waste regulations 2011 registration number CB/UM3984NA. Copies of which can be forwarded.

If you have any questions or concerns please do not hesitate to send any questions to or call us on 02920 397554 or 0800 111 4958.

Our Experienced Team Will Deliver

  • Professional Japanese Knotweed Removal
  • Expert Knotweed Removal
  • Japanese Weed Removal Services
  • Qualified Knotweed Treatment
  • Eradicate Japanese Knotweed