The grounds, in the order you will meet them
1. The source was not an insured peril
The most common, and the least negotiable if it is true. Admiral, for example, lists among its exclusions damage to drains and pipes, overflowing taps, faulty or failed grout or sealant, water from external above-ground pipes, and loss caused by subsidence, heave or landslip.
Where this gets challenged successfully is where the insurer has assumed the source. "It is behind a shower, so it is the sealant" is an assumption. A pressure test that isolates the hot feed and shows it losing pressure with the shower dry is evidence. We have overturned that particular assumption more than once, and it was the test result that did it, not the argument.
2. Gradual damage or wear and tear
The clause insurers reach for on concealed leaks. It is not the end of the matter: the ombudsman says that if it is not satisfied the insurer has shown the damage happened gradually, it is likely to tell the insurer to accept the claim, and it may require payment even where damage was gradual if the cause was an insured event, the damage was concealed so you could not reasonably have known, and you claimed as soon as you could. This has its own page: the gradual damage exclusion.
3. Unoccupancy
Most wordings restrict cover once a property has been empty beyond a stated number of consecutive days, and escape of water is usually the first cover to drop away. Admiral lists damage while homes are unoccupied among its exclusions, and Saga excludes trace and access where the home was unfurnished or unoccupied at the time of the damage. Conditions about draining down or maintaining a minimum temperature in winter often sit alongside.
If you are a landlord between tenancies, or the property is a second home, this is the clause to read before anything goes wrong rather than after.
4. No damage, so nothing to claim
Saga states that a claim needs actual damage and that without it the work is general maintenance. A meter that turns with the house dry is a supply pipe matter and belongs with your water company, not your insurer. Start from the meter evidence.
5. Late notification
Prompt notification is a condition in most wordings. A delay of months between discovering a stain and reporting it invites both a late notification point and a gradual damage point, because the two reinforce each other. Report the day you see it, even if you have not yet worked out what it is.
6. Misrepresentation at the point of sale
Under the Consumer Insurance (Disclosure and Representations) Act 2012, a consumer must take reasonable care not to make a misrepresentation when taking out or varying a policy. Where there is a qualifying misrepresentation, the Act divides it into deliberate or reckless, and careless. For deliberate or reckless, an insurer may avoid the contract and refuse all claims. For careless, the remedy depends on what the insurer would have done with the correct information, and may be a proportionate reduction in the claim rather than a refusal.
On water claims this most often bites on undeclared previous claims, undeclared unoccupancy, or a property let out on a policy sold for owner occupation. It is worth knowing that careless is not the same as fraudulent, and the remedies are not the same either.
7. The excess swallows it
Not a refusal, but the same outcome. If the loss is close to the excess there is nothing to pay. See excess and betterment before you notify.
