HomeServices Areas We Cover AboutOur WorkReviewsBlogContact07427 846158or 07843 741505 Get a Free Quote - 5-Star Rated on GoogleRoof Cleaning Specialists — County Durham # Moss-Covered Roof?Get a Soft-Wash Clean That Lasts. Lift years of moss, algae, and black streaking from your tiles — without pressure washing or damage. Fully insured, fixed-price, and biocide-treated to slow regrowth for years. Free roof inspection within 48 hours - Soft-wash system — no high-pressure damage - Biocide treatment included as standard Call 07427 846158Get a Free Quote Fully Insured 10+ Yrs Experience Work Guaranteed Get Your Free Quote Takes under 60 seconds · We reply within hours - Home - Services - Roof Cleaning Soft-Wash System Fully Insured Free Inspections Work Guaranteed 10+ Years Experience Service Overview ## Professional Roof Cleaning Across County Durham County Durham's wet, cool climate is the perfect breeding ground for moss, algae, and lichen. Within five to ten years of installation, most concrete and clay tiled roofs across the region develop visible green and black growth — particularly on north-facing slopes that get less sun. Left untreated, moss does more than spoil the look of your home. It traps moisture against the tile surface, accelerating freeze-thaw damage every winter. Thick growth lifts tile edges and channels water under the laps, creating slow leaks that often aren't spotted until ceilings stain. Loose moss falls into gutters, blocks downpipes, and causes overflow damp on external walls. Weather Shield Roofing provides safe, professional roof cleaning across Durham, Chester-le-Street, Houghton le Spring, and surrounding County Durham postcodes. We use a soft-wash system that lifts growth without damaging tiles, follow up with a professional biocide treatment, and leave your roof clear and protected. Every job starts with a free inspection. If your tiles are sound, cleaning is one of the most cost-effective improvements you can make to your home. If they're not — if cracking or delamination has gone too far — we'll tell you honestly and discuss what makes more sense. Why It Matters ## What Moss Is Actually Doing to Your Roof Moss isn't just cosmetic. A mature moss colony can hold its own weight in water — a saturated roof carries hundreds of extra kilograms of load. That weight stresses battens, lifts ridge tiles, and can pull older roofs out of square over time. The freeze-thaw cycle is where the real damage happens. Trapped water inside moss freezes overnight, expands, and chips microscopic flakes off the tile surface. After several winters, the protective glaze on concrete tiles is gone, the surface turns porous, and the tiles start absorbing rainwater instead of shedding it. Once that happens, the roof's days are numbered. Then there's gutter damage. Every storm washes loose moss off the roof and into your gutters. Blocked gutters back up, overflow at the joints, and saturate brickwork. We routinely see properties where £4,000 of penetrating-damp repairs could have been avoided by a £450 roof clean five years earlier. The good news is that most County Durham roofs we inspect are still well within their service life. Cleaning at the right time — before the tile glaze is lost — buys you another decade or more before any major work is needed. It's the cheapest roof investment you can make. How We Work ## Our Roof Cleaning Process 1 ### Free Roof Inspection We assess tile condition, moss coverage, valleys, ridges, and flashings. If your tiles aren't suitable for cleaning, we tell you straight. 2 ### Fixed-Price Quote A clear written quote covering scaffolding or access, manual scrape, soft-wash, and biocide treatment. No hidden extras. 3 ### Manual Moss Removal We hand-scrape thick moss and clear all debris from valleys and gutters before any wash begins — protecting your tiles from impact damage. 4 ### Soft-Wash Clean Low-pressure soft-wash lifts algae, lichen, and dirt without dislodging tiles or forcing water under laps. Safe on concrete, clay, and slate. 5 ### Biocide & Aftercare A professional-grade biocide is applied to kill remaining spores and slow regrowth. We leave the site clean and provide aftercare guidance. Your Advantages ## Why a Professional Roof Clean Pays Off ### Restore Kerb Appeal Lift years of moss, algae, and black streaking off your tiles. Roofs come back looking close to new — a noticeable boost to property value. ### Extend Roof Lifespan Moss holds moisture against tiles, accelerating freeze-thaw cracking. Removing it can add 5–10 years of useful life to your existing roof. ### Stop Hidden Leaks Thick moss lifts tile edges and channels rainwater under the roof covering. Cleaning removes the cause before it becomes a leak. ### Far Cheaper Than Replacement A professional clean costs a fraction of a re-roof. For most homes in County Durham, cleaning is the right answer when tiles are sound but dirty. ### Biocide Treatment Included We finish with a soft-wash biocide that kills spores at the root, slowing regrowth for years rather than weeks. ### Improves Solar & Insulation Cleaner tiles reflect less heat into the loft and stop moss shading any solar panels — small but real efficiency gains. In-Depth Guide ## Roof Cleaning Methods, Materials & What to Avoid ### Soft-Wash vs Pressure Washing Pressure washing a roof is one of the most damaging things you can do to it. The force needed to dislodge moss also strips the protective glaze off concrete tiles, blasts grout out of ridge bedding, and forces water up under the laps where the underfelt can't drain it. Six months later, you have a clean-looking roof and a slow leak. Soft-washing uses a low-pressure spray combined with cleaning chemistry — moss and algae lift off without the tiles being touched abrasively. ### Manual Scraping First Thick, established moss won't soft-wash off in one pass. We always start with a manual scrape — working downward across the roof so we don't lift tile edges. The bulk of the moss is bagged off the roof rather than washed into your gutters. This is slower than blasting it off with pressure, but it's the only way to leave the tiles intact. ### Biocide Treatment A professional biocide is applied after cleaning to kill the spores you can't see. Without biocide, regrowth often starts within a year because the dormant spores are still living in the tile surface. With it, you typically get three to five clear years on south-facing slopes and two to four years on north-facing slopes. We use trade-grade products applied at the correct dilution — not domestic moss killers from a DIY shop. ### Concrete vs Clay vs Slate Concrete tiles (the most common roof in County Durham, especially on 1960s–80s estates) clean up beautifully when the glaze is still intact. Clay tiles are more delicate but respond well to a careful soft-wash. Welsh slate is the most resilient — it doesn't host moss the same way, but lichen can take hold on older slates and is removed with a gentler treatment. We adjust the method to match the material. ### When Cleaning Isn't the Answer We won't clean a roof that's past its service life. If tiles are spalling, ridge bedding is failing, or the underfelt is rotted, cleaning won't extend useful life — it'll just make a tired roof look briefly better. In those cases we'll explain why a re-roof or section repair is the honest answer. About one in ten roofs we inspect falls into this category. ### Access & Safety We work from roof ladders, crawl boards, or scaffold towers depending on pitch and access. Heavy moss on steep pitches always needs proper edge protection. We're fully insured for working at height, and we never compromise on access just to keep the price down — if scaffolding is needed, it's quoted upfront. ### Aftercare Once the biocide is down, the roof keeps clearing for several weeks as remaining moss browns off and washes away in rain. You don't need to do anything — there's no rinsing or follow-up wash required. We recommend a light biocide top-up every 3–4 years to keep the roof looking right and slow regrowth indefinitely. Common Questions ## Roof Cleaning FAQs ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">How much does roof cleaning cost in County Durham? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Do you use a pressure washer on roofs? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Will roof cleaning damage my tiles? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">How long does the moss take to come back? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Do you clean the gutters as part of the job? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Can you clean in winter? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Is roof cleaning covered by my home insurance? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Do you offer roof coatings after cleaning? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">How long does a roof clean take? ### svg]:rotate-180 font-heading font-semibold text-sm text-foreground text-left py-4 hover:no-underline" data-radix-collection-item="">Do I need to be home when you clean? ### Related Services - Gutter Cleaning - Roof Repairs - Roof Replacements - Repointing - Chimney Work ### Areas We Cover - Durham - Houghton le Spring - Chester-le-Street - Bowburn - Spennymoor - Ferryhill - Peterlee - Coxhoe - Lanchester - Newton Aycliffe - Bishop Auckland - Sedgefield - Shildon - Tudhoe - Coundon - Leeholme - Cornforth - Chilton - Trimdon - Fishburn ## Ready to See Your Roof Clean Again? Book a free inspection. We'll assess your roof, give you a fixed-price quote, and tell you honestly whether cleaning is the right answer for your tiles. Get My Free Roof Quote 07427 846158 Or call 07843 741505 Most enquiries answered within hours · Free estimates · No hidden costs Trusted roofing contractor serving County Durham and surrounding areas. Over 10 years of experience delivering quality workmanship. ### Our Services - Roofing Services County Durham - Roof Replacements - Roof Repairs County Durham - Flat Roof Installation - Gutter Repair & Replacement - Fascia Board Installation - Soffit Replacement - Chimney Repair - Brick Repointing - Roof Cleaning County Durham - Gutter Cleaning County Durham ### Roofers Near You - Roofers in Durham - Roofers in Houghton le Spring - Roofers in Chester-le-Street - Roofers in Bowburn - Roofers in Spennymoor - Roofers in Ferryhill - Roofers in Peterlee - Roofers in Coxhoe - Roofers in Lanchester - Roofers in Newton Aycliffe - Roofers in Bishop Auckland - Roofers in Sedgefield - Roofers in Shildon - Roofers in Tudhoe - Roofers in Coundon - Roofers in Leeholme - Roofers in Cornforth - Roofers in Chilton - Roofers in Trimdon - Roofers in Fishburn ### Contact Us - 07427 846158 - 07843 741505 - info@weathershieldroofer.co.uk - 65 Mason Gdns, Chilton, Ferryhill, DL17 0DY - Opening Hours24 Hr Line Open — Monday to Sunday © 2026 Weather Shield Roofing. 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