Japanese Knotweed removal and eradication

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Soil Screening: Our soil screening technique aims to drastically reduce waste to landfill by removing Japanese Knotweed rhizome and plant material from the soil. By doing so, we can minimise the amount of waste that requires disposal while also preserving the valuable topsoil for reuse on-site or in other appropriate areas. This soil is classed as controlled and would need to be monitored and treatment if required.

On-Site Bunding/Stockpiling: On-site bunding/stockpiling is a containment method that involves removing the infested area of japanese knotweed or other invasive non natives via excavation. Then placing the controlled waste in a shallow bund in an appropriate location on site. This can then be treated in-situ with a professional herbicide treatment and monitoring plan. These bunds will need to be fenced off to prevent access to ensure control is achieved. Once control has been achieved these can form the basis of natural landscaped areas. Revegetation of the area is often advised. 

Cell Burial Method: The Cell Burial method involves a meticulous process starting detailed planning and the excavation of a specially prepared pit, which is then lined with a geotextile membrane. To ensure absolute containment, all joints within the cell are heat welded, sealing them tightly. The Japanese Knotweed infested material is then carefully excavated and deposited into the lined pit, creating what we refer to as "The Cell." For added security, another layer of geotextile membrane is applied over the pit and heat welded shut. To finalise the process, the cell is covered with a layer of soil, reaching a minimum of 2 meters in depth.

This method is particularly well-suited for areas of the site where construction or piling is not planned. However, in situations where building is intended, it is crucial to seek consultation with a qualified structural engineer.