Full roof clean
Moss, lichen, algae and dirt removed from every slope, ridge and valley, then the whole roof rinsed at low pressure and treated.
How a clean works
Roof cleaning in Barnet
Roof cleaning and moss removal across the London Borough of Barnet
We remove moss, lichen, algae and the debris that blocks your gutters, using hand tools and a low pressure soft wash rather than a damaging jet wash.
Every clean finishes with a biocide treatment that kills the spores left behind, so the growth doesn't come straight back. Barnet is one of London's leafiest boroughs, and tree cover, shade and damp winters are exactly what moss loves, so we see a lot of it.
- Tiled and slate roofs on terraced, semi-detached and detached homes
- Bungalows, garages, porches and outbuildings
- Debris bagged and taken away, gutters left running freely
What we do
Roof cleaning services in Barnet
Three core services, often booked together, plus the extras that make sure the job is finished properly.
Moss removal
Thick moss scraped off by hand, tile by tile, working with the laps so nothing is forced up underneath. Ideal where the tiles are otherwise sound.
What gets removed
Gutter clearing
Moss, leaves and silt cleared from gutters, outlets and downpipes so rainwater drains away from your walls and foundations.
Why gutters matterSoft wash and biocide
A professional biocide kills the spores left behind, so the roof stays cleaner for longer.
Roof condition check
We look for slipped or cracked tiles, worn ridge mortar and tired flashing while we are up there.
Conservatories and outbuildings
Conservatory roofs, garages, sheds and porches cleaned at the same visit.
How it works
What happens on the day
A typical semi-detached roof takes around four to six hours on site. Here is what we do, in order.
Inspect and protect
We check the roof from the ground and up close, note any damaged tiles, and sheet off paths, plants and conservatory roofs below.
Remove the moss
Heavy moss is scraped and brushed off by hand, working down the slope with the laps of the tiles, never against them.
Soft wash and treat
A low pressure wash lifts the remaining dirt and algae, then a biocide is applied to kill the spores that cause regrowth.
Clear up and report
Gutters and downpipes are cleared, all debris is bagged and taken away, and you get photos of the finished roof.
Prices
How much does roof cleaning cost?
Every roof is different, so we always quote after looking at yours. As a guide, these are the ranges most UK homeowners are quoted for a full clean with biocide treatment.
| Property | Typical quote | What moves the price |
|---|---|---|
| Bungalow or terraced house | £300 to £600 | Roof area, moss thickness, gutter clearing |
| Three bed semi-detached house | £400 to £950 | Pitch, height, dormers, valleys, biocide and gutters included or not |
| Detached house | £600 to £1,500+ | Size, steepness, heavy growth, scaffolding or access equipment |
Ranges are drawn from published 2025 and 2026 UK cost guides, which vary widely, mostly in what they include. Scaffolding, where a roof cannot be reached safely any other way, is priced separately. See the full breakdown in our guide.
Guides
Thinking about a roof clean?
Two plain English guides to help you decide whether your roof needs cleaning, and what happens if you leave it.
Guide
A guide to roof cleaning in Barnet
What a professional clean involves, how long it takes, what gets removed, the equipment used, typical prices, and how many Barnet homes need it each year.
Read the guide →
Advice
What happens if you don't clean your roof?
How moss and blocked gutters lead to cracked tiles, leaks, damp and rotten timber, and why a few hundred pounds now can save thousands later.
Read the article →
Areas covered
Roof cleaning across the whole borough
We cover every part of the London Borough of Barnet, including EN4, EN5, N2, N3, N11, N12, N20, NW4, NW7, NW9, NW11 and HA8.
- High Barnet
- New Barnet
- East Barnet
- Arkley
- Totteridge
- Whetstone
- Oakleigh Park
- Friern Barnet
- North Finchley
- Finchley Central
- East Finchley
- Woodside Park
- Mill Hill
- Edgware
- Burnt Oak
- Colindale
- Hendon
- West Hendon
- Golders Green
- Childs Hill
- Hampstead Garden Suburb
Free, no obligation
Get a roof cleaning quote
Tell us a little about your property and we will come back to you with a fixed price. Photos of the roof help, and we can arrange a visit if needed.
- 1Fixed written quoteThe price we quote is the price you pay, with everything included listed.
- 2No high pressureHand removal and a low pressure soft wash that respects your tiles.
- 3Left tidyGutters cleared, debris bagged and removed, photos of the finished job.
Questions
Roof cleaning FAQs
How much does roof cleaning cost in Barnet?
Most quotes for a typical three bed semi-detached house fall somewhere between £400 and £950, depending on the size and pitch of the roof, how much moss there is, access, and whether biocide treatment and gutter clearing are included. Larger detached houses and roofs needing scaffolding cost more. We give a fixed written quote after looking at the roof.
Do you use a pressure washer on roof tiles?
No. High pressure water can strip the surface from concrete tiles, force water under the laps and lift or crack older tiles, and tile manufacturers generally advise against it. We scrape off heavy moss by hand and use a low pressure soft wash with a biocide instead.
How long does a roof clean take?
A typical semi-detached house usually takes around four to six hours on site. Small bungalows can be quicker, while large, steep or heavily overgrown roofs, or jobs that need scaffolding, can take a full day or more.
How often should a roof be cleaned?
Most roofs benefit from a clean every three to five years. Roofs under or near mature trees, or that face north and stay damp, often need attention every two to three years.
Can I stay at home while you clean the roof?
Yes. We work from the outside only. We ask you to keep windows closed, move cars away from the driveway edge and keep pets indoors while we work.