Moss removal / roof cleaning in Cardiff
Clearing moss and biological growth from roofs before it lifts tiles and blocks valleys.
Wales · updated 2026-04-11 · 0 local roofers in directory
Typical cost in Cardiff
£150–£800
Mid-market: £350. Ranges are indicative; real quotes vary with scope, access, and materials.
See the full UK roofing cost guide for the methodology and the factors that move a quote up or down.
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.
Cardiff — local context
Traditional material: Welsh slate (locally quarried) on Victorian terraces.
Pontcanna, Cathays and Roath contain dense Victorian terrace stock with original Welsh slate; the material is local to Wales and typically specified on heritage re-roofs.
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.
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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.
What does moss removal / roof cleaning typically cost in Cardiff?
A typical moss removal / roof cleaning job in Cardiff falls in the £150–£800 range, with the middle of the market around £350. Cardiff’s labour and access factor (1.00× the national baseline) means prices run at the UK average. Actual quotes vary with access, materials, and specifics of the job.
Are there any Cardiff-specific things that affect price?
Pontcanna, Cathays and Roath contain dense Victorian terrace stock with original Welsh slate; the material is local to Wales and typically specified on heritage re-roofs.
How many roofers serve Cardiff through this site?
Our directory is still being built out for Cardiff. You can still submit a quote request — it will be held for matching once local roofers are onboarded.
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