Japanese knotweed insurance backed guarantee underwritten at Lloyd's

We’re not surprised if you’re confused about the various insurance backed guarantees (IBGs) available from different knotweed companies, so we thought the heads-up might help you. The majority of established knotweed companies give some form of guarantee, most promising to retreat any regrowth free of charge during the guarantee period.

Insurance backed guarantees go a step further, by ensuring the guarantee obligation is met even if the treatment company becomes insolvent. All the main banks and lenders will require a treatment programme and IBG on knotweed affected property before they are willing to lend. The IBG has therefore become an essential requirement for any owner of knotweed affected property.

Unfortunately not all IBGs are the same, and provide differing levels of security. Make sure you get what suits you and your property best.

“A” rated insurer accepted by all major lenders

Our guarantees are underwritten at Lloyd’s, a market leading rated insurer. It goes without saying that these are accepted by all the major banks and building societies in the UK.

£100,000 limit of liability

Cover can be arranged with a limit of liability of up to £100,000. Larger values can be obtained subject to insurer approval. Check that the amount of cover offered is adequate.

Cover effective in days – no delays

Most companies will issue their IBG when the work is complete, often 2 to 3 years or more after instruction.  Our IBG can be issued following our first visit/treatment, subject to receipt of full payment. This means you have certainty that you are fully covered from day 1.

Up to 10 years' cover

We can provide guarantees for 5 or 10 years to cover the treated area plus buffer zone, or the entire property. Don’t accept anything less than 5 years.

No excess charges 

There is no excess charge, or fee payable for making a claim. Read the small print and make sure you won’t have to pay anything if you do have to make a claim.


Check that the IBG can be assigned to a new owner especially if you are selling. Our IBGs can be assigned to new freehold or leasehold owners.