All our Japanese knotweed surveys are conducted by a CSJK qualified surveyor. Our expert surveys will find and record any visible signs of Japanese knotweed on, or affecting the property. Take control and book a survey.
Japanese knotweed is a tough weed! There are lots of myths on the internet that tell you that you can kill Japanese knotweed by mowing it or pouring petrol on it. But the truth is that Japanese knotweed can’t be killed without special methods.
This provides an instant and impressive rectification method to the problem of Japanese knotweed. By digging up and removing the contaminated ground, you can be sure that your property will be completely knotweed free.
In order to minimise the disruption, keep costs down and reduce the quantities of waste removed to landfills, our experts will conduct accurate identification of the rhizomes (roots) in the soil and only remove the affected areas.
To reduce the cost of excavation it may be feasible in some situations only to excavate to a set depth, and then use root barriers to cap and retain any further deeper knotweed contaminated ground. This is particularly cost-effective in instances when the ground won’t be disturbed, or when planned work will be less than 1m deep.
The proprietary root barriers are installed to fully contain the remaining knotweed contaminated ground and prevent its re-emergence. Expert installation and bonding ensure the complete integrity of the barrier. The contained non-excavated knotweed is therefore sustainably remediated on-site.
Sifting of the excavated knotweed waste soils can be used to lessen the volume of knotweed material within them. This method however cannot be guaranteed to remove all knotweed rhizomes and therefore the treated sifted soils will still need to be handled as potentially knotweed contaminated.
The reduction in the growth potential following sifting makes these soils more re-useable on your property, either in burial or relocation for monitoring. If they are removed from the site they will still be classed as controlled waste due to potential or known knotweed contamination.
As well as providing instant eradication of the knotweed, it allows fully sustainable disposal of the excavated waste on-site in accordance with Government regulations. The method requires a suitable size and location where the waste can be buried making this method more suitable for larger estates and farms.
A deep receival pit is excavated, deep enough so that at least 2m of clean fill can be placed above the deposited buried knotweed waste. The knotweed waste is deposited within the pit, encapsulated in a root barrier, which is referred to as the cell. By residing 2m below finished ground levels it helps protect the cell against future accidental human disturbance or burrowing animals.
In some situations, it may be possible to relocate knotweed from an undesirable location to another location on the property where it can be treated long term with herbicides. This provides the instant eradication of the knotweed from its current location which is perfect if you want to do any home improvements such as building an extension, while sustainably retaining and treating the knotweed.
Often only suitable for larger properties such as estates, small holdings and farms, the knotweed is relocated as a formed stockpile or landscape bund where any re-growth of knotweed is treated with herbicide. Once the knotweed growth has been controlled the relocated area can be carefully seeded or planted.
Another option for the control of Japanese knotweed it herbicide. This won’t eradicate the knotweed, but it will prevent it from growing and force it into a dormant state. This can be a suitable option for knotweed that isn’t on the development grounds and that won’t get disturbed by work.
Originally LRR was designed to encourage investment in land that was previously derelict or contaminated so it can be made purposeful again. It is a generous tax incentive intended to promote the remediation and development of land and buildings affected by Japanese knotweed or chemical contaminants such as Asbestos. It helps offset some of the cost of remediation services (which can include man-hours on the project, such as the Project Manager) through capital gains tax relief.
With Japanese knotweed or contaminated grounds. The claimant must be the owner (adopter) at the time of the works and pay capital gains tax. Successful claims can result in capital gains tax refunds on qualifying work values of up to:
However, many property owners are either not aware of the scheme, or not clear of the qualifying criteria for making a claim, and could be missing out on this valuable cash-back incentive. Given that claims can be made that continue year-on-year for ongoing treatments, and can be claimed retrospectively for up to 3 years.
We can provide you with the best and most up to date industry information and advice on whether you can claim, and if so how to kickstart the process. Click the button and you will be able to download a useful fact-sheet about LRR as well as contact us about an LRR claim.
Do you suspect that you may have Japanese knotweed on your site, but you're not sure? Use our free identification service, send in a couple of pictures and we'll come back with confirmation for you.