A storm rolls through, the ceiling starts dripping, you lodge a claim, and you assume the roof damage is covered. Then the decline letter arrives. If that's where you are, you're not alone, and it doesn't automatically mean the decision is final or that you've done anything wrong.
This guide explains the most common reasons roof leak claims get declined in New Zealand, in plain language, and the practical steps to take next. We're a roofing-focused inspection and assessment service, and we'll be straight with you: how insurers think about roof claims, where they'll look to avoid paying, and how a solid roof assessment helps you push back.
The one distinction that decides most roof claims
Almost every roof leak decline comes back to a single line in your policy: cover is for sudden, accidental, one-off events (like a storm), and not for gradual deterioration, wear and tear, ageing, or lack of maintenance.
That sounds clear until a real roof is involved. Most Wellington roofs that leak in a storm were already carrying some age, some rust, some perished sealant, or a tired flashing. So the question an insurer asks isn't simply "did it leak after the storm?" It's "what actually caused the water to get in, the storm, or the condition the roof was already in?" That's where claims are won and lost.
The three declines we see most often
1. "Maintenance, not storm damage"
This is the big one. The damage might look like it built up over time: rust eating through old fixings, sealant that has perished, flashings worn thin. When it does, an insurer can class it as a maintenance issue and decline it, even when a storm is what finally tipped it into leaking. Older metal and pressed-metal tile roofs are especially prone to this reading, because age-related wear is visible and easy to point to.
2. "We can't confirm the cause"
On many roofs, the exact point where water is getting in can't be pinned down for certain without opening the roof up. Water can travel a long way from where it enters to where it shows up inside. If nobody can confirm a storm-related entry point, an insurer may argue the link to the storm isn't established, and decline on that basis. An honest assessment will sometimes say "we can't see a single obvious cause yet", and an insurer can use that same honesty against the claim. It cuts both ways.
3. "Future-proofing" or "betterment"
Insurers generally pay to put the roof back to the condition it was in before the event, not to improve it. So if the sensible fix would leave you better off than before, replacing more than was damaged, upgrading an old detail, an adjuster may treat that extra as "future-proofing" or "betterment" and decline that portion. We've seen an honest recommendation to "fix it properly so it doesn't come back" get reframed as mitigation the policy doesn't cover.
Why an honest roofer can't just promise you a tidy "storm damage" verdict:
It's tempting to want a report that says, flatly, "the storm did this." But if a roof is genuinely worn, or the cause genuinely can't be confirmed, writing anything else isn't honest, and an experienced adjuster will see straight through it. A credible, factual record of what's actually there is worth far more to your claim than an overstated one that falls apart under scrutiny.
Where a roof assessment letter fits in
When an insurer asks what caused a leak, or you want to push back on a decline, what helps is a clear, dated, plain-language record of the roof's visible condition and the likely cause, with photos. That's what an insurance roof assessment letter is: a roofing-focused inspection of the visible and accessible areas, written up so a claims handler can read it and understand exactly what they're being asked to consider.
Be clear about what it is and isn't. We document the visible condition and give our read on the likely cause. We don't provide a guaranteed leak diagnosis, we don't open up the roof, and we don't make the claim decision, that sits with your insurer. What a good letter does is replace a vague verbal description with credible, dated evidence, written in language that's hard to wave away.
Don't just take the first "no"
A decline is a position, not a verdict. Insurers don't make money paying claims, and a homeowner who gives up is the cheapest outcome on their books. Plenty of declines are first offers dressed up as final answers, and the wording, "maintenance", "can't confirm the cause", "future-proofing", is softer than it sounds. The way to push back isn't frustration, it's evidence.
If your claim is declined
- Ask for the decline in writing, with the exact policy wording it relies on. You're entitled to know precisely why.
- Read that wording on "sudden damage" versus "gradual deterioration" and "maintenance", and match it against the reason you were given.
- Get a roofing-focused assessment letter recording the visible condition and likely cause, with dated photos.
- Separate the leak repair from any wider improvement, so the whole claim isn't dismissed as "future-proofing".
- Still disagree after their internal complaints process? Escalate to their free dispute-resolution scheme (see below). It costs you nothing.
If it stays declined, you've still got a roof to fix
Sometimes a claim is declined and stays that way, the leak doesn't stop just because the claim did. That's the moment to weigh the options: usually a choice between a proper, durable repair and a lower-cost, best-effort fix (which can't carry the same warranty), with the trade-offs stated plainly. The right call depends on the roof, your plans, and your budget, and it's yours to make.
How Aerial Assess can help
Aerial Assess is a Wellington-based, drone-assisted roof inspection and assessment service. If your insurer has asked what caused a leak, or you've had a claim declined and want a clear record of the roof's condition, we carry out a roofing-focused inspection of the visible and accessible areas, drone-assisted where access is difficult, and write it up as a plain-language assessment letter you can pass straight to your insurer.
We cover Wellington, the Hutt Valley, Porirua, the Kāpiti Coast, and Wairarapa. We're clear about what a visual assessment can and can't confirm: there's no guaranteed leak diagnosis, and there's no obligation to use us for any repair work that might come out of it.
Common questions
Can you guarantee my insurance claim will be approved?
No, and you should be wary of anyone who says they can. We carry out a roofing-focused inspection of the visible and accessible roof areas and write up a clear, factual assessment letter of what we observed and the likely cause. The claim decision sits entirely with your insurer. What a good letter does is give you and your insurer a plain-language record to work from.
My insurer says my leak is "maintenance, not storm damage". What does that mean?
Most house policies cover sudden, one-off events such as a storm, but exclude gradual wear, ageing, and lack of maintenance. The damage might look like it built up over time: rust through old fixings, perished sealant, worn flashings. When it does, an insurer may class it as maintenance and decline it, even when a storm is what finally made it leak. The line between the two is often where claims are won or lost.
Can you prove the storm caused my roof leak?
Often the exact point where water is getting in can't be confirmed for certain without opening up the roof, and we're always upfront about that. What we can do is document the visible condition, note what we observed, and give our read on the likely cause. We don't provide a guaranteed leak diagnosis, and we don't make the claim decision, but a clear, dated record of the roof's condition is usually far better evidence than a verbal description.
My insurer called the repair "future-proofing" or "betterment". Why does that matter?
Insurers generally pay to put the roof back to the condition it was in before the event, not to improve it. If a repair would leave you better off than before, by upgrading or doing more than a like-for-like fix, an adjuster may treat the extra as "future-proofing" or "betterment" and decline that part. It's worth separating the leak repair itself from any wider improvement, so each can be considered on its own terms.
Who can I complain to if I think my claim was unfairly declined?
First, ask your insurer for the decline reason in writing and the specific policy wording it relies on. If you still disagree after their internal complaints process, your insurer must belong to a free dispute-resolution scheme that can review the decision at no cost to you. For many insurers that scheme is the Insurance & Financial Services Ombudsman. Ask your insurer which scheme they belong to, or check your policy documents.