Japanese knotweed damage

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The video above is a short snippet from The BBC One Show, featuring David Attenborough, that investigates the sad story of a couple in Hertfordshire who have lost £250,000 on the value their family home due to damage caused by Japanese Knotweed. 

Japanese knotweed damage is not uncommon and situations, like the one highlighted in the video, are an example of what can happen through a lack of awareness. Japanese knotweed will target the weakest points in a property and attempt to grow through them. 

Why Japanese knotweed is a problem to property 

Japanese knotweed can grow up to 10cm per day, and because of this rapacious growth, it has been known to cause damage to building structures and substructures by targeting weak points, such as cracks in masonry, and attempting to grow through them. Typical damage from Knotweed includes:

  • Damage to tarmac and paving
  • Damage to building foundations
  • Damage to retaining wall structures
  • Reduction in property values

When you understand the risks Japanese knotweed can pose, it is no wonder that property owners are concerned if they find Japanese knotweed on their property.

Why knotweed damage is a problem for mortgage lenders

As seen in the video snippet above, the threat of damage from Japanese Knotweed has seen a number of mortgage companies refusing to lend on properties that are affected by Japanese Knotweed. Local Authorities are also refusing planning permission to infested areas.

Thankfully, in the first white paper of its kind, the Royal Institution of Chartered Surveyors (RICS) has now printed guidelines that categorise the risk caused by Japanese Knotweed and the treatments that can be implemented by Trustmark, Guaranteed Protection Insurance (GPI) and Property Care Association (PCA) approved contractors like Wise Knotweed Solutions.

Lenders are now approving mortgages on properties covered by Japanese Knotweed Guarantees issued by contractors like Wise Knotweed Solutions who follow the treatment and removal guidelines of the RICS, GPI & PCA

To find out more on what the RICS has to say on Japanese Knotweed, click to visit our web page regarding the RICS on Japanese Knotweed.

Photos of Japanese knotweed damage

Speak to a Japanese Knotweed expert

If you are unsure whether you have a Japanese knotweed issue, it is always best to consult a specialist.

Contact our Wise Knotweed Solutions team on freephone 0808 231 9218, click to find your local branch or contact us online using our online contact form.

Contact Wise Knotweed Solutions

Why Choose Wise Knotweed Solutions

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  • Real and meaningful guarantees

  • Transparent & itemised costs

  • Instant Onsite Diagnosis & Estimates

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  • PCA Award winners

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