
Clean Roof
A cleaner roof that looks better and lasts longer
Moss, lichen and algae removed safely and treated with a biocide, restoring your roof's appearance and extending its lifespan.
Overview
Clean Roof with GAC Roofline
Moss and lichen might look harmless, but on a roof they act like sponges. They hold moisture against tiles and slates, lift the edges of tiles so wind-driven rain can get underneath, and wash down into gutters where they cause blockages. In winter, trapped water freezes and expands, cracking tiles from the inside.
Our roof cleaning service removes moss and growth carefully using hand tools and low-pressure methods chosen to suit your roof covering. We avoid aggressive high-pressure jet washing, which can strip the protective surface of concrete tiles and force water under the laps.
Once the roof is clean we apply a professional biocide treatment that kills remaining spores and slows regrowth for years. We finish by clearing the gutters of everything that came off the roof, so you're left with a clean roof and a free-flowing drainage system.

Warning signs
When do you need clean roof?
Spotting problems early keeps repair costs down. If you notice any of the following, it's time to get in touch.
- Thick moss cushions sitting on tiles or in the valleys
- Black, green or orange staining across the roof
- Moss clumps falling into gutters and onto paths
- Tiles lifting where growth has built up underneath
- Roof looking noticeably older than the rest of the house
Why GAC Roofline
Roofing you can rely on
Choosing a roofer is about trust. Here's what you can expect every time you work with us, whatever the size of the job.
Honest advice
We'll only recommend work that's genuinely needed, backed up with photos so you can see the problem for yourself.
Fixed, written quotes
Clear, itemised prices agreed before work begins. The price we quote is the price you pay.
Guaranteed workmanship
Every job is completed to a high standard and covered by a written guarantee.
Fully insured
Comprehensive insurance cover for complete peace of mind while we work on your property.
Tidy & respectful
We protect your property, keep disruption to a minimum and leave the site clean every day.
Responsive service
We answer the phone, reply to messages and turn up when we say we will.
Reviews
What our customers say
Don't just take our word for it. Here's what local homeowners say about working with George and the team.
Our process
How our clean roof service works
Clear steps from start to finish, so you always know what's happening and what comes next.
- 01
Roof assessment
We identify your roof type and the level of growth to choose the safest cleaning method.
- 02
Protect & prepare
We protect the surrounding area and set up safe access to the roof.
- 03
Clean & treat
Moss and lichen are removed, then a biocide is applied to prevent rapid regrowth.
- 04
Clear up
Gutters are emptied, debris is removed and we send before and after photos.
FAQs
Clean Roof FAQs
Straight answers to the questions we're asked most often. Can't find what you're looking for? Just give us a call.
Will roof cleaning damage my tiles?
Not with the right method. We choose hand scraping, soft brushing and low-pressure rinsing based on your roof covering, and we never blast tiles with high-pressure jets.
How long will my roof stay clean?
With a biocide treatment most roofs stay clear of significant growth for several years, depending on how shaded the roof is and how close it is to trees.
Is the biocide safe for pets and plants?
We use professional products applied carefully to the roof only, and we protect planting below. We'll advise on keeping pets indoors while the treatment dries.
Can you repair tiles at the same time?
Yes. Any slipped or broken tiles found during cleaning can be replaced during the same visit, saving you a second call-out.
Related services
You may also need
Areas we cover
Clean Roof across Swindon and Wiltshire
GAC Roofline provides clean roof for homes and businesses in Swindon, Wootton Bassett, Highworth, Cricklade and the surrounding Wiltshire area.
- Swindon
- Wootton Bassett
- Highworth
- Cricklade
- Wiltshire
All our services
Everything your roof needs
From small repairs to complete installations, one trusted team looks after every part of your roofline.
Need clean roof?
Book a free, no-obligation inspection and receive a clear written quote. Friendly advice, honest pricing and quality workmanship, guaranteed.


