Ask the insurer for the refusal in writing, naming the exact policy term. Gather dated evidence that the leak was a sudden failure rather than slow seepage, ideally a specialist report that records where it was found and what failed. Then use the insurer’s formal complaints process and, if needed, the Financial Ombudsman Service, which is free.
The letter says your escape of water claim has been declined because the damage was “gradual”. You are standing in a room with a ruined floor, a plumber’s invoice and a leak that only became visible last month, and one word has turned a covered event into your problem. It feels final. It is not. A refusal is a decision, and decisions get reviewed when better evidence turns up.
What “gradual” means to an insurer
Most UK buildings policies cover a sudden and unforeseen escape of water. What they exclude is damage that built up over time: a joint that wept for months, a shower tray seal that failed slowly, a pipe that corroded through. The exclusion is usually worded as gradual deterioration, gradually operating causes, or wear and tear, and it sits alongside a separate exclusion for lack of maintenance.
The logic is that insurance is for the unexpected. The difficulty is that a hidden leak nearly always looks gradual from the outside, because by the time anyone sees a stain the water has been running for a while. The staining is gradual. That does not mean the failure was. A fitting that split on a Tuesday night and ran unseen under a floor for six weeks is still a sudden event, even though the damage crept up.
Some claims handlers reach for “gradual” because the file has nothing in it to say otherwise. Your job is to put something in the file.
Read the refusal before you respond
Do not reply to the decision on the phone. Ask for three things in writing:
- The exact policy clause relied on. Not “gradual damage” in general, but the section and wording. You are entitled to a clear reason.
- What evidence the decision was based on. Was it a loss adjuster’s visit, a desk review of your photos, or a phone conversation? A refusal built on a phone call is easier to move than one built on a site inspection.
- Which part of the claim was refused. Trace and access, the damage repair, or both. They are separate heads of cover. Our guide to what trace and access cover actually includes explains the split, and a surprising number of refusals come from the two being muddled.
Then read your own policy schedule and wording alongside the letter. Check that the exclusion quoted matches what your document says, that trace and access appears on your schedule, and what the limit is.
The evidence that changes the decision
The burden of showing that the damage came from an insured event sits with you, so the quality of what you send back decides most appeals. Aim to answer three questions: what failed, when it failed, and why you could not reasonably have spotted it earlier.
| Evidence | What it shows | Where to get it |
|---|---|---|
| Specialist leak detection report | Where the leak was, what part failed, how it was found, with photos | A detection survey, ideally before the repair is made |
| Dated photographs of the first sign of damage | When the water first became visible and how quickly you acted | Your phone; check the file dates |
| The failed part itself | A split fitting or a fractured pipe is physical proof of a sudden failure | Ask the plumber to keep it; do not let it go in the skip |
| Water bills and meter readings | A step change in consumption dates the start of the leak | South West Water account, your own readings |
| Maintenance records | Boiler services, a recent plumber’s visit | Invoices and emails |
| A written timeline | Puts the whole story in order for the reviewer | Write it yourself, one page, dates only |
The report matters most. A good trace and access report does not simply say “leak found under the hall floor”. It records the method used (thermal imaging, acoustic listening, tracer gas or moisture mapping), the location, the type of failure, the extent of damage, and photographs of the pipe or fitting once exposed. Written in the language insurers use, it lets a reviewer see a sudden failure where a claims handler saw a damp patch.
If the repair has already been done and the fitting is gone, a specialist can still map the damage, date it against your evidence, and give an opinion on the failure from the pipe route and the pattern of moisture. It is weaker than a report written with the pipe exposed, which is why we suggest a trace and access survey before anything is cut out.
Writing the response
Keep it short and factual: a one-page covering letter, the report, the photographs and the timeline. State the policy clause you are answering, say why the evidence shows a sudden escape rather than a gradually operating cause, and ask for the decision to be reviewed. Leave emotion out, however justified, because it gives the reviewer nothing to work with.
Two points to make where they apply. A leak hidden under a floor or inside a wall could not have been seen with ordinary care, so lack of maintenance does not fit. And damage becoming visible slowly is not the same as the cause being gradual. Send it by email so you have a dated copy.
The complaints route and the Ombudsman
If the insurer holds its position, ask for the matter to be logged as a formal complaint. That single phrase changes how the file is handled. UK insurers are required to deal with complaints under a set procedure, and they normally have up to eight weeks to give you a final response letter.
Once you have that letter, or if the eight weeks pass without one, you can refer the complaint to the Financial Ombudsman Service. Some things to know:
- It costs you nothing. You do not need a solicitor or a claims management firm, and you should be wary of anyone offering to run it for a percentage.
- There is a time limit. You usually have six months from the final response letter to refer the complaint, so do not sit on it.
- They look at fairness, not only wording. The Ombudsman considers what is fair and reasonable in the circumstances, which is exactly where a well-documented sudden failure helps.
- The decision binds the insurer. If you accept the Ombudsman’s final decision, the insurer has to follow it.
The insurer’s own process comes first. The Ombudsman will not look at a complaint that has not been put to the insurer.
Older Cornish properties and the gradual question
This argument comes up often in Cornwall, and the housing stock is why. A granite cottage in Bodmin with early copper pipework, a cob farmhouse near Launceston with pipes chased into soft walls, a converted chapel with three generations of plumbing under one floor: these give a claims handler an easy line about age and wear. Coastal damp adds to the confusion, because penetrating rain can produce staining that looks like a leak, or hide a real leak behind what everyone assumes is the weather.
That is also why a report from someone who has separated the two makes such a difference. Moisture mapping shows whether the wet area spreads from a pipe route or from an outside wall. Thermal imaging shows a heating leak as a warm trail, a supply leak as a cold one, and rain as neither. Put that in front of a reviewer and “old house, probably gradual” stops being a good enough answer.
What to do while the appeal runs
Do not let the dispute stop you protecting the property. Insurers expect you to take reasonable steps to limit the damage. Get the leak stopped, ask the plumber to keep the failed part, keep receipts for drying and temporary repairs, and keep photographing. If the insurer has already appointed a loss adjuster, our guide to preparing for a loss adjuster’s visit covers what to have ready.
If you are at the start of the process, it is easier to get the paperwork right first time than to unpick a refusal later. Our walkthrough of making a water leak claim in the right order sets out when to notify, what to send and when to bring in a specialist. We provide leak detection across Cornwall and produce insurer-ready reports as standard, and we are happy to look at a refusal letter and tell you honestly whether a survey would help your case.
Frequently asked questions
What does gradual damage mean in a water leak claim?
It means the insurer believes the damage built up over time rather than coming from a sudden, unforeseen event. Most buildings policies exclude gradually operating causes and wear and tear. A leak that ran unseen for weeks is not automatically gradual, because the failure itself can still have been sudden, and evidence of that is what the appeal turns on.
Can I appeal a trace and access claim that was refused?
Yes. Ask for the refusal in writing with the exact policy term quoted, gather evidence including a specialist report, and ask for a review. If the insurer still refuses, raise a formal complaint. After their final response, or if eight weeks pass without one, you can refer it to the Financial Ombudsman Service without charge.
Does a leak detection report help overturn a refusal?
Often it is the single most useful document. A proper report records where the leak was, what failed, how it was found and photographs of the exposed pipe or fitting, in language a claims reviewer recognises. It turns an assumption about gradual damage into a question of evidence, which is what the insurer and the Ombudsman weigh.
How long do I have to take a refused claim to the Ombudsman?
Complain to the insurer first. They normally have up to eight weeks to give a final response. From that letter you usually have six months to refer the complaint to the Financial Ombudsman Service. If the insurer does not respond within eight weeks you can go to the Ombudsman anyway. The service is free to use.
Need evidence for your appeal?
If your claim has been refused as gradual, a dated specialist report can change the outcome. We locate the leak, document the failure and give you a report written for insurers.
