Japanese Knotweed Case Study – West London

Japanese Knotweed Case Study – West London

FAST System Eradication Supporting New Apartment Development

IVM was instructed to eradicate Japanese Knotweed from a development site in West London. The main stand of Knotweed was located off‑site, adjacent to a public highway, creating a contamination risk to the construction footprint. The client required a guaranteed solution that avoided costly soil removal and minimised disruption to the development programme.

Project Overview

Location: West London
Site Type: Development site – new apartments and regeneration works
Contamination: Main Knotweed stand located off‑site beside public highway
Risk: Potential spread into construction footprint
Client Requirement: Guaranteed eradication without soil removal or root barriers

The Challenge

The Knotweed infestation originated off‑site, but posed a direct risk to the planned apartment development. Traditional excavation would have required soil to be removed from site and potentially the installation of a root barrier system — both costly and disruptive to the construction programme. The client needed a rapid, guaranteed solution that avoided these expenses.

Our Solution

IVM implemented our proprietary FAST System eradication method across both the on‑site and off‑site Knotweed areas. The FAST System accelerates herbicide uptake and delivers full eradication without the need for excavation, soil removal, or root barrier installation — providing significant cost savings to the client.

Outcome

• Complete eradication achieved using the FAST System
• No soil required to leave site
• No root barrier system needed
• Significant cost savings for the development
• Fully guaranteed treatment supporting construction progress