VTInvasives.org is a great resource to look at different methods to treat knotweed, but each suggested method offers varying levels of success calling for a variety of resources and time. Specialist herbicides are required and these are to be applied by competent and trained technicians. The cost of a DIY Japanese Knotweed treatment is considerably less than a professional treatment. Fully digging out and disposing of a similar-sized area might cost up to £20,000 but is usually only necessary in extreme infestations. The cost for this report includes the treatment, monitoring and certification cost, and will be detailed within the management plan before any works are signed up to. Getting rid of Japanese Knotweed with herbicide treatment is usually more cost effective and is most popular with residential properties. Our prices typically start from £1,500 – £2,000 +VAT for a small area providing a five year management plan. A herbicide treatment is the most cost-effective Japanese knotweed treatment. We offer our services nationwide through local teams supported with our bespoke innovative field based software to deliver the very best service. For an average domestic garden, you should expect to pay around £1000-£2950 for a herbicide treatment. More rigorous treatment of Japanese knotweed is sometimes necessary. It costs approximately £3,000 to get rid of Japanese knotweed from a typical residential property using a herbicidal treatment plan that is insurance backed by the PCA. Knotweed is notoriously difficult to control and often seems indifferent to many treatment methods. The treatment involves carefully and methodically managed visits where a chemical is sprayed onto and injected into the knotweed over a sustained period of time. For a typical garden with an average-sized Knotweed infestation, you’ll pay around £50 per year for disposable safety equipment and around £100 per year for the chemical. The cost to treat and eradicate Japanese knotweed increases depending upon the area requiring treatment. If you are the buyer, you can ask the seller to deduct the likely cost of treatment from their asking price. The cost of removing Japanese knotweed will depend on the size of the area that needs to be treated and also on the method of removal. This Treatment Plan is widely accepted by all mortgage lenders along with the Insurance Backed Guarantee. Japanese Knotweed can be treated in situ with the use of herbicides, this is a far more cost effective method that typically costs just 10-15% of the price of excavation and removal from site by physical/mechanical means. As an alternative to removing Japanese Knotweed, it is also possible to halt its spread by using a Japanese Knotweed root barrier to prevent the growth of roots limiting its read and spread. It does, however, take longer than using any of our excavation methods, as it requires repeated treatment over several growing seasons to ensure all traces of knotweed are killed off. ... A follow up second year treatment costs approximately $300/acre and if treatments for a third and subsequent years are necessary, the cost is around $200/acre/per year. PAY AS YOU SPRAY Pay as you spray was designed for the home owner that is not selling and wanted a cheaper way to treat Japanese Knotweed and if the home owner decides to sell the Pay as Spray cost is deducted from the 5 Year Plan cost. If you are looking for a cost-effective Japanese Knotweed treatment then root barriers could be an option for you. Japanese Knotweed Specialists are one of the UK’s leading contractors and consultants in the control, treatment and removal of Japanese Knotweed and other Invasive Weeds. Japanese knotweed Reynoutria japonica ... spread, as well as the economic and environmental costs of Japanese knotweed. 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