The short answer
Usually not. Insurers generally treat moss as a maintenance matter, and buildings policies tend to exclude gradual deterioration, wear and tear and neglect. A leak that follows a storm may be covered even on a mossy roof, but a claim that traces back to years of growth often is not. Do not assume cover exists: get the exclusions page in front of you and put the question to the insurer directly, ideally before any damage occurs.
Why insurers see moss as upkeep
A buildings policy is designed to respond to events: a storm that strips tiles, a fallen branch, a burst pipe. Moss is not an event. It spreads over seasons, and a roof covered in it has usually been that way for a long time. Insurers therefore tend to class it with the routine care that a homeowner is expected to carry out, alongside clearing gutters and repointing a ridge.
Policy wording varies, so we cannot tell you what yours says, but the usual themes are consistent. Exclusions commonly mention wear and tear, gradual damage, rot and failure to maintain the property. Moss damage, which is slow and visible, sits uncomfortably in those categories. The practical effect is that a claim for the cost of cleaning, or for a covering that has deteriorated under growth, is unlikely to succeed.
Where cover might still apply
The question that matters is what actually caused the loss. If a named storm lifted a section of tiles and rain came in, the cause is the storm, and the presence of moss on the rest of the roof does not by itself make the claim invalid. If a tree fell on the roof, the same logic holds.
Where it becomes harder is the borderline: water coming in at an overlap that moss has held open, or a slate that split in frost after years of saturation. A loss adjuster may well argue that the underlying cause was long-term deterioration. How that argument lands depends on the wording and on the evidence, which is why dated photographs matter. Our answer on whether moss should be removed sets out when growth crosses the line from cosmetic to harmful.
One more point: sudden damage and gradual damage can overlap. A roof in poor condition may fail in the first strong wind, and the insurer will look at the state it was in beforehand.
Evidence that helps if you do have to claim
If something goes wrong, the first priority is to stop water getting in. Take dated photographs of the damage, the surrounding roof and any water marks inside, and keep them. If you can show a roof that was inspected and maintained, you are in a stronger position than if you cannot.
That is one reason a written survey, with pictures taken on your roof, is worth holding on file. Evidence of how the covering stood before an event, with each clean and repair listed and dated, hands a loss adjuster something concrete to read instead of an argument about what the roof might have looked like. It also helps you notice slow changes yourself, such as tiles creeping out of line or growth spreading from the north slope round to the east, long before they become a claim. MyBuilder's 2026 guide puts a standard roof survey at £150 to £250 and a drone survey at £200 to £400, which is modest against the cost of a disputed claim.
Keep invoices for any cleaning or repair, too. They show the property is looked after, which is the point most policies turn on.
What moss removal costs, set against a refused claim
It helps to put numbers beside the principle. MyBuilder's 2026 roof cleaning guide gives pitched roof cleaning at about £450 to £850, tile roofs at £400 to £750 and slate at £500 to £1,000, with flat roofs at £300 to £600. Those are typical national ranges, not our prices, and once we have surveyed a roof, the quote we send covers the whole job, including the cleaning, the access and any gutter work.
Compare that with the bill for replacing damaged battens or re-laying a slope after prolonged saturation. The cost of preventing the damage is nearly always the smaller figure, and unlike a repair it is not at the mercy of an insurer's reading of the policy.
If you are tempted to tackle the growth yourself to save money, read whether you can remove roof moss yourself safely before you reach for a ladder, because an injury or a cracked tile costs far more than the saving.
Questions to put to your insurer, and what to do next
Ring your insurer or broker and ask plainly. Does the policy exclude gradual deterioration or lack of maintenance? Does it require the roof to be kept in good repair as a condition of cover? Would moss on the roof affect a claim for storm damage? Ask for the answers in writing, and study the conditions and exclusions in the full document rather than leaning on the one-page summary, which rarely mentions maintenance duties. If you rent the property out, or the home is a second one, check whether the same terms apply, because some policies are stricter about unoccupied or let buildings and the roof is often the first place an insurer looks.
Then deal with the roof. Regrowth is a fact of life on shaded slopes, so see how quickly roof moss grows back to plan an inspection routine that suits your roof. Our work is covered by a 10-year workmanship guarantee in writing, which is separate from your home insurance and does not replace it.
For the full picture of what we do, see roof cleaning and moss removal.