Moss removal / roof cleaning in the UK
Clearing moss and biological growth from roofs before it lifts tiles and blocks valleys.
Typical UK cost range
£150–£800
National baseline. City-specific ranges are adjusted for local labour and access costs on the city pages below. See the full UK cost guide for the methodology and the factors that move a quote.
What the job involves
Moss grows on the cooler, north-facing side of roofs and in valleys where moisture sits. Light moss is cosmetic. Heavy moss lifts tile edges, blocks valleys, and holds moisture against the covering, which accelerates wear on slate, clay, and concrete.
A professional moss removal is done by hand with a scraper and then treated with a moss-killing biocide to slow regrowth. Power washing a roof is usually a bad idea — it damages concrete tile surface and can force water past laps.
What changes the price
- Roof area affected and how heavy the growth is.
- Access (ladder vs tower).
- Whether treatment with biocide is included.
- Whether the valleys and gutters need clearing at the same time.
Timeline: Usually 1 day for a standard semi.
Pick a city for local pricing
Each city page has adjusted cost ranges, local context, and the roofers in our directory that cover it.
Major English cities
Other English cities
Northern Ireland
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Start my quote requestCommon questions
Is moss actually bad for the roof?
Light moss is cosmetic. Heavy moss is a real problem — it lifts tile edges, blocks valleys, and holds moisture against the covering. On a roof already approaching end of life, heavy moss accelerates failure by several years.
Why not just power wash it?
Power washing strips the protective surface from concrete tiles (shortening their life), forces water up under the laps, and can crack slate. Hand removal and biocide treatment is the right approach.
Related guides
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