Roof Cleaning in London — Professional Results, Fair Prices
Professional roof cleaning in London costs from around £500 for a terraced house to £2,000+ for larger properties. We use soft washing and biocide treatments — never high-pressure jets that damage tiles. Our methods safely remove moss, algae and lichen while preventing regrowth for up to 5 years.
Why Your Roof Needs Professional Cleaning
Moss retains water against the tile surface, which freezes and expands in winter — cracking and loosening tiles over time. Moss debris also washes into gutters, causing blockages and overflow. Algae (often Gloeocapsa magma) causes permanent black streaking, while lichen embeds into the tile surface and won't wash away in the rain. Left unchecked, the weight of heavy moss buildup can even stress the roof structure.
Roof Types We Clean
Concrete Tiles
The most common UK roof type. Tolerates soft washing well but is prone to heavy moss buildup.
Clay Tiles
Common on period properties. More fragile — never high-pressure, soft wash only.
Slate
Naturally resistant, but lichen and moss still accumulate over time. Requires a gentle technique.
Flat Roofs
Pooling water accelerates algae growth. We use specialist, drainage-aware cleaning.
Our Process
1. Survey
Roof assessment from ground level to identify growth, access route and any repair needs.
2. Safe Access
Scaffolding, cherry picker or roof ladder, depending on the property and our risk assessment.
3. Manual Moss Removal
Bulk moss scraped and brushed off before any chemical treatment.
4. Biocide Application
Professional-grade soft wash treatment kills remaining growth at the root.
5. Low-Pressure Rinse
Where needed — never high-pressure.
6. Gutter Clearing
Moss debris is cleared from gutters after the roof clean.
Biocide continues working for several weeks after application — full results are typically visible at 4–8 weeks.
Why We Don't Use High-Pressure Washing on Roofs
High-pressure washing cracks and dislodges tiles, forces water under tiles into the roof felt and structure, strips protective coatings, and can void some tile manufacturer warranties. This is why we exclusively use soft washing and biocide treatments for roof cleaning.
Pricing
From £500 for a terraced house — see our full roof cleaning cost guide for detailed pricing by property size and access requirements.
Frequently Asked Questions
Yes — it prevents costly tile damage from trapped moisture, extends roof life, and prevents gutters from blocking with moss debris.
Our biocide treatment prevents regrowth of moss and algae for 2–5 years, depending on the roof's aspect and surrounding trees.
It depends on the property. We assess access first and use the safest suitable method, often a cherry picker or roof ladder rather than full scaffolding.
Spring or autumn — mild weather and safer working conditions, and treatment has time to work before winter frost or summer growth. See our seasonal timing guide.
Often yes, using long-reach lance systems and cherry pickers depending on the roof layout and access.