Portishead BS20 · March 2026
Portishead semi roof treatment
Before: Heavy moss on the shaded slopes and debris dropping into the gutters.
After: Cleaner tile lines, removed moss load, and treatment applied for ongoing improvement.
Roof moss removal, scrape method, and biocide treatment
Roof cleaning in Bristol & Bath — safer moss removal and a tidier roofline
Scrape-led roof cleaning for tiled homes where the aim is a cleaner roof, clear gutters, and a finish that still respects the tile surface.
Roof cleaning jobs usually arrive after the moss has stopped being cosmetic. Gutters are filling up, shaded slopes look dark from the street, and the property starts to feel older than it is. Buyers rarely want a roof blasted. They want the moss removed properly, the debris handled tidily, and the treatment explained in plain English.
That is why this page is built around scrape method roof cleaning, controlled tidy-up, and biocide treatment rather than a rushed pressure-wash promise.
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Waste handling proof for commercial sites, roof work, and debris removal.
470+ cleans across BS & BA postcodes
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What we clean
What we clean on Bristol and Bath roof-cleaning jobs
These are the surfaces and situations we most often see when this service is booked across Bristol, Bath, and the surrounding BS and BA postcodes.
Concrete roof tiles carrying thick moss growth and damp edge build-up.
Clay-tile roofs where moss and lichen are making the front elevation look dark and neglected.
Semi-detached and detached homes with blocked gutters linked to falling roof debris.
Porch roofs, bay projections, and lower rear slopes that stay cooler and hold growth longer.
Garage roofs and linked outbuildings where the main house and smaller roofs need to look consistent.
Properties in coastal or tree-lined locations such as Portishead, Bathwick, and Westbury-on-Trym where damp shading accelerates growth.
How we clean it
How we clean it
Roof cleaning needs the debris removed first, the waste controlled, and the treatment matched to the roof rather than forced through the quickest possible route.
1. We assess the tile, access, and moss load
The first check is whether the roof suits scrape-and-treat work, what the edges and valleys are holding, and how the debris will be captured. This is also where we spot brittle tiles, awkward conservatory lines, and any gutter pressure that needs handling carefully.
2. Moss is scraped and bagged, not washed into the drainage line
Loose growth is removed by hand or controlled tool work and bagged as it comes away. That keeps the job cleaner, protects gutter runs, and avoids the mess that often follows an over-fast wash-down approach.
3. The roof is treated with biocide
Once the bulk growth is off, treatment is applied so the finish continues improving after the visit. This matters because a roof that is only scraped can still hold residual spores and darker regrowth patterns if no after-treatment is used.
4. Gutters, edges, and handover photos are finished properly
Roof cleaning only feels complete when the gutters are cleared of fallout, the access zones are left tidy, and the owner has clear before-and-after proof. That final handover is part of the service, not an afterthought.
Typical prices
Mid-terrace or small bay-fronted home
From £425
Scrape method with treatment where access is straightforward.
Standard three-bed semi
From £625
Typical price band for scrape, bag, treatment, and gutter clean-up.
Four-bed detached roof
From £785
Larger slope area, heavier moss load, and more roof-edge detailing.
Garage or secondary roof add-on
From £95
Useful where the smaller roof sits in the same frontage view.
Every quote is written and fixed against the agreed scope, so the job is not being priced on guesswork alone.
The 7-day rework promise.
If anything about the finish isn't right within 7 days of us leaving, call or WhatsApp. We come back out. No invoice disputes. No third chase. No quibble.
This is how we have worked since day one. It is why most of the work that comes through now still starts with referrals and repeat bookings.
Before and after
Recent local proof, not anonymous stock claims
Westbury-on-Trym BS9 · February 2026
Westbury-on-Trym tile clean
Before: Darkened roof slopes visible from the front drive.
After: Tidier roof colour and a cleaner roofline from the street.
Case study spotlight
Roof moss removal in Portishead — scrape and biocide on a coastal semi
Portishead BS20 — scrape, treatment, and tidy-up completed in a day for £625.
A four-bed semi in Portishead had heavy moss build-up, blocked valleys, and obvious dark patches from the road. We handled the scrape and treatment in a day and supplied before-and-after drone stills afterwards.
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Operational proof
470+ cleans across BS & BA postcodes, plus a founder-led guarantee and written quotes rather than guessed numbers.
Questions people ask before booking
Straight answers on damage risk, pricing, speed, and aftercare
Will roof cleaning damage the tiles?
Not if the method is chosen properly. On most domestic roof-cleaning jobs we quote, the whole point is to avoid a blunt pressure-wash approach. We assess the tile, scrape the moss, bag the debris, and use treatment so the improvement comes from controlled process rather than impact. If a roof looks too fragile for the planned method, we say so before booking.
How much does roof cleaning cost in Bristol or Bath?
Written pricing is used so there is a fixed scope rather than a guessed number shouted over the phone. Domestic work usually needs a few photos or a quick visit. Commercial work often needs a site survey first so the price reflects access, risk, water, and mobilisation properly.
Do you remove the moss or just treat it?
The bulk moss is removed first. That matters because owners usually want the roof looking tidier straight away, not just chemically treated and left to change slowly over time. Treatment is then applied so the roof keeps improving after the visit and regrowth is slowed down.
What happens to the moss that comes off the roof?
It is collected and bagged as the job progresses. We do not treat tidy-up as optional. Moss left in the gutters, across the patio, or down the side path is one of the quickest ways to make a roof-cleaning visit feel poorly finished, so debris handling is part of the scope.
Do you clear the gutters as part of roof cleaning?
Roof cleaning and gutter clean-up naturally go together because roof debris nearly always ends up in the gutter line. Where the job includes moss removal, we normally expect gutter clearance or at least gutter checking to form part of the handover so the visit leaves the roofline genuinely reset.
Can you work in winter or bad weather?
Light drizzle does not always stop exterior cleaning, but heavy rain, high winds, and any condition that weakens finish control or safety will push the job back. If we move it, we explain why and offer the next practical slot rather than leaving the day vague.
Is biocide safe around pets and gardens?
We explain the product route before we start. On K-Rend, silicone render, roof tiles, and soft-wash work, the method is matched to the surface so the treatment does the cleaning rather than raw pressure alone. Pets, planting, and drainage are discussed before the job starts.
How often should a roof be cleaned again?
That depends on tree cover, roof aspect, local damp conditions, and how quickly the property shows regrowth. In many Bristol and Bath settings, owners do not need annual roof cleaning. They need one proper reset, then a sensible check-in cycle. Shaded roofs, coastal exposure, and heavy tree cover can shorten the gap.
Where we serve
Local demand across Bristol, Bath, and the surrounding ring towns
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Related services
The adjacent services buyers usually compare before they decide
Final CTA
Send one photo. Get the written route back before the day gets away from you.
That might be a same-day ballpark by WhatsApp, a short call, or a written visit plan if the job needs a closer look. Either way, the next step is clear.