Combined Removal Methods
Combined Removal Methods
London Japanese Knotweed - Combined Removal Methods
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Combined Techniques for Removing Japanese Knotweed

On a typical construction and development project a combination of techniques are used. The first step is to appoint us as your Knotweed Clerk of Works.Our Knotweed Surveyor will formulate a Management Plan, Risk Assessment, Method Statement and schedule of works. We provide the knotweed expertise and knowledgeable onsite staff as required, the client provides the plant and machinery to excavate the knotweed.

Essential Knotweed Reading

Guide to Japanese Knotweed for Developers - Environment Agency
Japanese Knotweed Code of Practice produced by the Environment Agency
JK Guidance ID and Control produced by the Cornwall Knotweed Forum

Watch this BBC video on the latest research of Japanese Knotweed Removal Methods

A Typical Construction Site Project - The Process

The client has a potential site for development but suspects that there may be several stands of knotweed infestation throughout the area. The client approaches us and asks for a pre-purchase feasibility study on the development Following this, your appoint one of our specialists as your Knotweed Clerk of Works.

A management plan is produced detailing a combined approach to treatment

  • Excavation and stockpiling of the infected soil
  • The excavated area is back filled with uncontaminated muck from clean parts of the site
  • Sifting and Screening of the excavated soil to remove knotweed rhizomes
  • The screened soil is reused on non critical soft landscaping areas
  • As an alternative, root barriers and onsite cell burial may be used.
  • Rhizomes are removed to licensed landfill site
  • Herbicidal treatment of screened soil used in soft landscaping
  • 3 year site monitoring program to ensure no reinfestation

The above process requires considerable ground excavation but vastly reduces the amount of contaminated material taken off site to landfill and consequently reduces the cost of treatment ignorantly.

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Japanese Knotweed Photos

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