Roof Cleaning in Cardiff & Across Wales
Wales Roofing and Guttering provides professional roof cleaning in Cardiff and throughout Wales — including moss removal, biocide treatment, and soft washing for residential and commercial properties.
TRUSTED BY 100’s OF HOMEOWNERS ACROSS WALES
TRUSTED BY 100s OF HOMEOWNERS ACROSS WALES
Our Service
Professional Roof Cleaning
Services in Cardiff
Professional Roof Cleaning Services in Cardiff
Roof cleaning in Cardiff is something most homeowners put off until the moss has spread across the ridge or the gutters are backing up after every downpour. By that point, the damage is already well under way. Moss, algae, and lichen hold moisture against your tiles, and in a Welsh winter — where freezing temperatures follow weeks of rain — that trapped water expands and cracks the surface. Left alone, a roof that simply looks neglected can quietly become a roof that leaks.
We carry out roof cleaning across Cardiff, Newport, Swansea, Bridgend, and the wider Welsh valleys. Our approach depends on the roof itself. Concrete tiles, natural slate, clay — each material responds differently to cleaning methods, and we tailor the work to suit. Whether it is a terraced property in Pontypridd, a semi in Penarth, or a detached home in the Vale of Glamorgan, the principle stays the same: remove the growth, treat what remains, and leave the roof in a condition where water runs off as it should.
Every job begins with a free survey and a written quote. No obligation, no pressure, and no work starts until you are satisfied with what has been agreed.
The Welsh Climate
Why Roof Cleaning
Matters in Wales
Why Roof Cleaning Matters in Wales
Wales has one of the wettest climates in the UK. Cardiff alone sees roughly 1,150mm of rainfall each year, and in the valleys and western coastal areas the figures climb higher still. That persistent damp creates the ideal conditions for moss and algae to take hold on roof tiles — often within just a few years of the last clean.
The problem goes beyond how the roof looks. Moss acts like a sponge, holding water against the tile surface long after the rain stops. In winter, that retained moisture freezes, and the repeated expansion and contraction cracks tiles and loosens fixings. Over time, the damage works its way beneath the surface, affecting the felt, the battens, and eventually the timbers underneath.
Blocked gutters are another consequence. Moss sheds debris constantly, and it accumulates in the guttering system until water has nowhere to go. The overflow runs down external walls, staining render and brickwork and, in some cases, finding a route into the property itself. Regular roof cleaning stops this chain of damage before it gains momentum, and it costs a fraction of what a full roof repair would run to.
Experience
15+
Years of Experience
Insured
100%
Fully Licensed & Insured
Clients
100s
Happy Homeowners
Guaranteed
Written
Guarantee on All Work
Our Roof Cleaning Process
We start every roof cleaning job with a proper survey — not a glance from the driveway. We check the tile condition, the extent of the moss and algae, and the safest way to access the roof. From there, we put together a clear quote that reflects the actual scope of work, with no surprises halfway through.
Once on site, we set up scaffolding or tower access where needed. Our team removes moss and biological growth manually using profiled scrapers and wire brushes on telescopic poles, which allows us to work without stepping directly on the tiles. This matters because walking across a moss-covered roof — particularly older concrete or slate tiles — risks cracking what is already weakened.
After scraping, we apply a professional-grade biocide treatment across the entire roof surface. This penetrates the tiles and kills off remaining roots, spores, and algae that scraping alone cannot reach. Over the following weeks and months, rain gradually washes the residual dead matter away, and the biocide continues working to slow regrowth.
As a final step, we clear the gutters of all debris displaced during cleaning. There is no point cleaning a roof only to leave the guttering system blocked.
Why Choose Us
Why Choose Wales
Roofing & Guttering
Why Choose Wales Roofing & Guttering
Plenty of companies offer roof cleaning in South Wales, so it is worth knowing what sets one apart from another. Here is what we bring to every job.
We are roofers first. That distinction matters. A cleaning company will clean the surface and move on; we understand the structure underneath. If tiles are cracked, if the pointing along the ridge has failed, or if a section of flashing has lifted — we spot these issues during the cleaning survey and can address them at the same time, saving you the cost and disruption of a second visit.
Our team works for us directly. No subcontractors, no agency labour. If you need to discuss something on site, you are speaking to the people doing the work. We carry full public liability insurance, and all completed work comes with a written guarantee.
We also do not push unnecessary treatments. If your roof simply needs a manual clean and a biocide, that is what we will quote. We are not in the business of recommending roof coatings or sealants unless there is a genuine reason for it.
Our Own Team, Every Time
We do not hire subcontractors for roof cleaning work. The crew that arrives at your property is employed by us, trained by us, and accountable to us. You will always know who is working on your roof and who to speak to if you have questions.
Methods Matched to Your Roof
Not all roofs respond to the same treatment. We assess the tile material, condition, and pitch before recommending a cleaning method. Concrete tiles, natural slate, and clay each need a different approach — and getting it wrong can cause more harm than the moss itself.
Full Photo Documentation
We photograph the roof before, during, and after the clean. If we discover cracked tiles, failed pointing, or damaged flashing, we document it and talk you through the options before any additional work begins. No surprises, no hidden charges.
Our Own Team, Every Time
We do not hire subcontractors for roof cleaning work. The crew that arrives at your property is employed by us, trained by us, and accountable to us. You will always know who is working on your roof and who to speak to if you have questions.
Methods Matched to Your Roof
Not all roofs respond to the same treatment. We assess the tile material, condition, and pitch before recommending a cleaning method. Concrete tiles, natural slate, and clay each need a different approach — and getting it wrong can cause more harm than the moss itself.
Full Photo Documentation
We photograph the roof before, during, and after the clean. If we discover cracked tiles, failed pointing, or damaged flashing, we document it and talk you through the options before any additional work begins. No surprises, no hidden charges.
Areas We Cover
Roof Cleaning Across
Cardiff, Swansea, Newport & Beyond
Roof Cleaning Across Cardiff, Swansea, Newport & Beyond
Our base is in Cardiff, but we carry out roof cleaning throughout South Wales and beyond. Regular jobs take us to Newport, Penarth, Barry, Caerphilly, Pontypridd, Bridgend, Swansea, and the Vale of Glamorgan. We have also worked further afield in Pembrokeshire and across the Welsh valleys.
The standards do not change with the postcode. A terraced row in Splott receives the same attention as a detached property in Cowbridge. We survey every roof individually, because what works on a concrete tile semi in Newport will not necessarily suit a natural slate cottage outside Brecon.
Most of our roof cleaning enquiries come through word of mouth and returning customers. That tells us more than any accreditation could — though we hold those too. We turn up when agreed, we clean up after ourselves, and we do not leave site until the work is finished and you are satisfied with the result.
If you are unsure whether we cover your area, call us or fill in the contact form. If we can get to you, we will.
Areas We Cover
Cardiff
Merthyr Tydfil
Newport
Swansea
Carmarthen
Bridgend
Port Talbot
Porthcawl
Llanelli
Ammanford
Burry Port
Gorsenion
Pyle
Pencoed
Cowbridge
Barry
St. Mellons
Caerphilly
Pontypridd
Porth
Tonypandy
Blackwood
Pontypool
Cembran
Caerleon
Risca
Rogerstone
Abertillery
Brynmawr
Ebbw Vale
Tredgar
Rhymney
Aberdare
And All Surrounding Areas
Areas We Cover
Cardiff
Merthyr Tydfil
Newport
Swansea
Carmarthen
Bridgend
Port Talbot
Porthcawl
Llanelli
Ammanford
Burry Port
Gorsenion
Pyle
Pencoed
Cowbridge
Barry
St. Mellons
Caerphilly
Pontypridd
Porth
Tonypandy
Blackwood
Pontypool
Cembran
Caerleon
Risca
Rogerstone
Abertillery
Brynmawr
Ebbw Vale
Tredgar
Rhymney
Aberdare
And All Surrounding Areas
Book a Roof Cleaning Survey
And Receive a Free Quote
Frequently Asked Questions
Roof Cleaning
Questions Answered
Roof Cleaning Questions Answered
We get asked many of the same questions about roof cleaning. Here are straightforward answers to the most common ones. If yours is not covered, get in touch and we will be happy to help.
How much does roof cleaning cost in Cardiff?
Costs typically sit between £300 and £800 for a standard residential property in Cardiff. The final figure depends on roof size, the severity of moss and algae growth, and the cleaning method required. Steeper roofs or those needing scaffolding will cost more. We provide a free survey and a written quote before any work begins, so you will know the full cost upfront.
How long does a professional roof clean take?
Most residential roofs in Cardiff and South Wales take between one and two days. A heavily moss-covered roof on a larger property may take a little longer. The biocide treatment is applied on the same day as the manual clean, and the gutter clearance is completed before we leave site.
Is pressure washing safe for my roof tiles?
It depends on the material. Pressure washing can work well on sound concrete tiles, but it carries risks on older slate, clay, or already weakened surfaces. High-pressure water can strip granules from tiles and force moisture through the waterproof membrane. We assess every roof before recommending a method, and in many cases low-pressure soft washing or manual scraping is the safer option.
How often should I have my roof cleaned?
Every three to five years is a reasonable guide for most properties in Wales. Homes near trees, in heavily shaded areas, or in particularly wet parts of the country may benefit from more frequent cleaning. A biocide treatment after each clean slows regrowth and can stretch the interval between appointments.
Do you clean roofs outside of Cardiff?
Yes. We work across Wales, including Newport, Swansea, Bridgend, the Vale of Glamorgan, Pontypridd, Penarth, Barry, Caerphilly, and further afield. If you are unsure whether we cover your area, contact us and we will confirm.
Will cleaning damage my roof tiles or slates?
Not when the work is carried out properly. We use profiled scrapers and telescopic tools to avoid standing on the tiles wherever possible, and we match the cleaning method to the tile type. Our team works from scaffolding or tower platforms to protect both the roof and themselves. If we spot any existing damage during the survey, we will let you know before starting the clean.
Ready to get your roof cleaned?
Whether your roof needs a straightforward moss removal or a more thorough clean with biocide treatment, we will survey the job properly and give you an honest assessment of what is needed. No hard sell, no unnecessary extras — just the work your roof actually requires.
Call us today for a free, no-obligation quote, or fill in the contact form and we will get back to you promptly.
