Is a flat roof harder to insure?

Insurers price risk, and a flat roof is one feature that can raise a question. Water sits on a flat surface for longer than it does on a slope, so a failed covering may let water in faster than a pitched roof would. Some forms or renewal questions therefore ask whether the home has a flat roof, what share of it is flat and how old the covering is.

That does not mean flat roofs are refused. Extensions, bay windows, porches and garages often have them, and many policies cover homes with flat roofs without comment. The way insurers treat them varies, and it is worth reading your own policy document and asking the insurer directly rather than relying on general advice. Cover for a flat-roofed extension can differ from cover on the main roof, which is another reason to ask.

We cannot tell you what a particular insurer will do, and we do not handle insurance claims. What we can do is help you gather the facts the insurer is likely to ask for.

Three facts carry most of the weight.

• Age of the covering. A roof laid a few years ago looks different to an insurer than one with an unknown history. Note when it was last replaced.
• The material. Felt, EPDM, GRP, single-ply and lead have different typical lifespans. Published guides give MyBuilder's 15 to 30 years for a flat roof generally, 20 to 30 years or more for EPDM (GreenSpec), 25 to 40 years for GRP and 10 to 20 for torch-on felt (Less).
• Records. Invoices, a written guarantee, photographs of the work and notes of any repairs show the roof has been looked after.

These are typical ranges, not promises, but they help you describe the roof accurately. Compare EPDM and GRP if you are choosing a new covering with this in mind.

Many policies exclude damage caused by gradual deterioration. Which? warns that wear and tear is often outside standard cover, and its example is a leak through a roof that nobody has kept up. The Financial Ombudsman Service asks three things: did a storm actually happen that day, does the damage look like storm damage, and was it the weather that caused the harm or something already wrong?

Complaints tend to fail when the roof was already in a poor state that the owner knew about, or when a storm merely showed up an old fault. See the Ombudsman's storm damage page for its approach.

Nothing here predicts how any claim would turn out, which is why a dated record of the roof's condition, with a note of any repairs, matters more than most owners expect. A sound roof with papers behind it makes the clearest case, and a neglected one the weakest.

Answer the insurer's questions accurately. If a form asks whether the roof is in good repair, and you know of an open leak or a patch that is failing, say so or get it fixed first. Statements that turn out to be wrong can cause difficulties later, and it is better to deal with the roof than to hope nobody asks.

If you have recently replaced the covering, mention it, with the material and the date. If you plan to build an extension with a flat roof, tell the insurer before work begins, since the policy may need to reflect the change. Ask the insurer in writing if you are unsure what it needs.

If you are selling, a buyer's survey may comment on the flat roof too. Our page on liquid flat roof coatings covers one way to extend the life of a sound roof, and our survey photographs give you a dated record of its condition.

Upkeep is the part within your control. Clear the outlets and gutters of leaves and moss, check after storms for lifted edges, loose trims or blisters, and mend minor faults early. A roofer's visit with photographs before and after creates a record you can show an insurer.

Keep what you are given: the quote, the invoice, the guarantee and the photographs. Pictures taken before and after any work, filed with the invoice, are worth more than a memory of how the roof used to look. If you ever have to describe the roof's condition and age, those papers are the evidence. A roof with a clear history is easier to describe than one with gaps.

In an emergency, advice from the ABI during Storm Eunice in 2022 was to ring your insurer promptly and talk to them before booking temporary repairs. Keep any receipts. Our priority is leaks and storm damage, and a roof letting water in is made safe first.

A survey leaves you with dated photographs and a written quote. A sound roof that needs a minor repair is not replaced for the sake of it. The 10-year guarantee we give covers our workmanship, comes in writing, and is not an insurance policy.

We leave the site clear. To arrange a look at your flat roof, ring 01793 626096 or send a WhatsApp or form enquiry. If you are weighing a replacement, our page on flat roofs in a conservation area covers when consent is needed.