Roof Treatment
South Wales
Safe removal of moss, lichen and algae from roof tiles and slate across South Wales. Biocidal treatment applied to protect your roof and prevent regrowth. Fully insured. Free quotes.
Why Welsh Roofs Need Regular Treatment
Wales has one of the wettest climates in the UK. That persistent damp and mild weather creates perfect conditions for moss, lichen and algae to take hold on roof tiles and slate. Left untreated, these organisms work their way under tiles, cause cracking and lifting, block gutters and accelerate the deterioration of your roof.
At Iron Shield we safely remove all biological growth using specialist equipment and biocidal treatment — extending the life of your roof, restoring its appearance and protecting your property from water damage.
Does Your Roof Need Treatment?
If you recognise any of these signs, your roof needs attention before the damage gets worse.
Green, yellow or black patches on your roof tiles are a clear sign of biological growth. The longer it’s left, the deeper it penetrates into the tile surface.
Moss debris washes down into gutters during rain. If your gutters are constantly blocking or overflowing, roof moss is often the root cause.
Black or green streaks running down from the roofline indicate algae or lichen on the roof is washing down your walls when it rains.
Moss and lichen work their way under tile edges, causing them to lift and crack in cold weather. This lets water in and accelerates roof deterioration.
A roof that looks uniformly darker or patchy compared to neighbouring properties is almost always carrying significant biological growth across the tile surface.
In the Welsh climate, roofs typically need treating every 3–5 years. If it’s been longer than that, it’s worth a check — prevention is always cheaper than repair.
What We Work On
The most common roof type in South Wales. Moss and lichen removed safely using soft brushing and biocidal treatment — no high-pressure jetting that could crack tiles.
Welsh slate roofs require a particularly careful approach. We use gentle manual removal and low-pressure treatment to protect the integrity of the slate.
Reconstituted and synthetic slate roofing cleaned and treated. Biological growth removed and protective biocide applied to slow regrowth.
Garage roofs, flat roof extensions and outbuildings treated for moss and algae growth. Particularly important on flat surfaces where standing water accelerates growth.
Garage and outbuilding roofs treated to the same standard as the main house roof. Often the most heavily affected surface due to lower pitch and more shade.
Our Roof Treatment Process
Call, WhatsApp or fill in our form. We assess the roof type and level of growth and respond within 2 hours.
Choose a date that suits you. We confirm by text and give a 2-hour arrival window — no all-day waiting.
Moss manually removed, surface cleaned and biocidal treatment applied. Gutters cleared of debris as standard.
Before and after photos sent on completion. We collect payment and leave your property clean and tidy.
Why South Wales Chooses Iron Shield
We built this business on reliability, transparency and results. No hidden charges, no cutting corners — just professional roof treatment delivered properly, every time.
The Iron Shield Difference
Public liability insurance as standard. You and your property are always fully protected.
We never use high-pressure jets on roofs. Manual removal and low-pressure treatment protects your tiles throughout.
We send before and after photos after every single clean — evidence of the transformation.
We understand the Welsh climate and what it does to roofs. Fast response, genuine local knowledge.
FAQs
Roof Treatment Across South Wales
We cover all major towns and surrounding areas. Not sure if we cover you? Give us a call — chances are we do.
Ready to Book Your
Roof Treatment?
Free quotes · No obligation · Response within 2 hours