07946 209052hlee-sonroofing@outlook.com 12 Yeovil Road, Sandhurst GU47 0TEOpen 24 hours, 7 days a week HomeAboutServicesOur WorkAreasReviewsContactGet a Free QuoteMenu - Home - Services - Roof Cleaning Roof cleaning · moss, algae & lichen # Sandhurst’s TrustedRoof Cleaning Specialists Moss, algae, lichen and black staining removed by roofers rather than pressure-washing generalists, then treated with biocide to slow re-growth. It protects the covering, clears the gutters that moss blocks, and costs a fraction of replacing a roof that was only ever dirty. Get my free quotation07946 209052 Roof-trained teams · biocide treatment included · free, no-obligation quotation - Cleaned and inspected by qualified roofers - Biocide treatment to slow re-growth - Fully insured with safe access equipment - Photographed before and after - 100% satisfaction guarantee The service ## What Roof Cleaning Involves and Why It Is Roofing Work Roof cleaning is not just cosmetic. Moss holds water against tiles and slates, keeps the surface permanently damp, and in frost that trapped water expands and breaks down the face of concrete tiles. Lichen roots into the surface. Algae and black staining spread across north-facing pitches where the roof never fully dries. Left long enough, the covering degrades faster than it should and the roof reaches the end of its life early. There is a drainage problem too. Moss does not stay on the roof. It washes into gutters and down-pipes, blocks the outlets, and pushes water over the back of the gutter and down the wall, which is how a moss problem quietly becomes a damp problem. We clean roofs as roofers. That means checking the covering as we go, spotting slipped tiles, failed pointing and tired flashings while we are up there, clearing the gutters that the moss has filled, and applying a biocide treatment afterwards so the growth does not simply return the following winter. ### When a roof needs cleaning - Visible moss cushions along tile courses, valleys and north-facing slopes - Black or green staining across a roof that used to be uniform in colour - Moss debris in gutters, down-pipes or on the ground after rain - Properties being prepared for sale, valuation or letting - Roofs that are sound but look tired and are dragging down the appearance of the whole propertyBook a free site visit If it is left ## What Untreated Moss Costs Over a Few Winters Moss keeps a roof wet. A wet roof in freezing weather is a roof under stress: water absorbed into the face of a concrete tile expands as it freezes and spalls the surface, and once the surface has gone the tile weathers far more quickly. Repeated over several winters, an otherwise serviceable covering ages years ahead of schedule. The gutters suffer first and cheapest. Washed-down moss blocks outlets, gutters overflow, and water runs down the wall instead of into the drain. That produces damp patches internally, saturated brickwork, frost damage to pointing and rotting fascia and soffit timber, every one of which costs more to fix than the cleaning would have. There is also the resale angle. A heavily mossed roof reads as neglect to a buyer or a surveyor, and it invites questions about the condition of a roof that may be perfectly sound underneath. ### Common mistakes with roof cleaning - High-pressure washing that strips the granular surface off concrete tiles and forces water under the laps - Cleaning without any biocide treatment, so the moss is back within a couple of seasons - Leaving the removed moss in the gutters, converting a roof problem into a drainage problem - Working from ladders without proper access, breaking tiles and creating new leaks - Treating a roof that is actually finished, cleaning does not fix perished underlay or failed flashings ## Recent roof cleaning work How we work ## Our roof cleaning process The same sequence on every job, from the first call to the photographs at the end. - Step 1 ### Inspection and assessment We look at the covering condition first. If the roof needs repair rather than cleaning, we say so before you spend money making a failing roof look better. - Step 2 ### Safe access set-up Proper access equipment is put in place so the roof can be worked on without walking damage, and ground areas, planting and paths are protected. - Step 3 ### Moss, algae and lichen removal Growth is removed using methods appropriate to the covering, taking care not to damage the surface of the tiles or disturb the laps. - Step 4 ### Gutter and down-pipe clearance All displaced moss and debris is cleared from gutters, hoppers and down-pipes, and outlets are checked so water actually runs away. - Step 5 ### Biocide treatment, check and photographs A biocide treatment is applied to slow re-growth, the site is cleared, and before and after photographs are handed over with our 100% satisfaction guarantee. What you get ## Why customers choose us for roof cleaning ### Extends the life of the covering Removing water-holding growth reduces frost damage to tiles and slows the ageing of an otherwise sound roof. ### Fraction of the cost of replacement For roofs that are dirty rather than finished, cleaning delivers most of the visual improvement of a new roof at a small share of the cost. ### Drainage restored Gutters and down-pipes cleared in the same visit, so the water leaving the roof goes into the drain rather than down the wall. ### Slower re-growth Biocide treatment after cleaning means you are not repeating the exercise every other year. ### Free condition report Because roofers do the work, you get an informed view of slipped tiles, pointing and flashings while the access is already up. ### Kerb appeal for sale or letting The roof is the largest surface on the house. A clean one changes how the whole property presents to buyers and valuers. In detail ## Growth Types, Methods and Roof Coverings Different growth on different coverings needs different handling. Getting this wrong damages tiles, so method selection is part of the survey. ### Moss, algae and lichen Moss forms thick cushions in tile courses and valleys, particularly on shaded, north-facing and tree-lined roofs, which describes a great many properties around Crowthorne, Owlsmoor and the wooded parts of Camberley and Bracknell. Algae shows as green or black film across the surface. Lichen is the crusty, pale growth that grips hardest and needs the most careful treatment. All three thrive on damp, shaded surfaces and all three keep the roof wetter than it should be. Biocide treatment after physical removal is what breaks the cycle rather than resetting it. ### Concrete tiles, clay and slate Concrete tiles have a granular surface layer that can be stripped by aggressive pressure washing, leaving the tile more porous than before it was cleaned. Clay tiles are more resilient at the surface but brittle underfoot. Natural slate cleans well but is unforgiving of careless walking and of any method that lifts fixings. The covering dictates the method, not the other way round. ### Cleaning as part of maintenance Roof cleaning works best combined with gutter cleaning and a roofline check, because those three things are the drainage path of the entire building. Where a survey shows slipped tiles, failed ridge bedding or tired flashings, dealing with them while access is already in place saves a second mobilisation. ### Domestic and commercial cleaning Domestic roof cleaning is largely about appearance plus protecting a covering the owner intends to keep for years. Commercial and larger-scale work adds access planning around operating premises, larger areas of low-pitch roof, and rainwater systems that carry much greater volumes and cause bigger problems when they block. ### Where we clean roofs Sandhurst, Owlsmoor, Crowthorne, Blackwater, Yateley, Camberley, Bracknell, Wokingham, Farnborough, Fleet, Frimley, Ascot and the surrounding towns within roughly a 50-mile radius of our base. ### Areas we cover for roof cleaning - Sandhurst - Owlsmoor - Crowthorne - Blackwater - Yateley - Camberley - Bracknell - Wokingham - Farnborough - Fleet - Frimley - AscotBased at 12 Yeovil Road, Sandhurst GU47 0TE, working across Berkshire, Surrey, Hampshire and everywhere else within roughly a 50-mile radius. See all of the towns we cover. Common questions ## Roof Cleaning, your questions answered If your question is not here, call Henry Lee and the team on 07946 209052. Open 24 hours, 7 days a week. - See all roofing services - H Lee & Son Roofing homepage - Contact us for a free quotation How much does roof cleaning cost in Sandhurst?It depends on the size and pitch of the roof, how heavy the growth is and what access is needed. The survey and written quotation are free and carry no obligation. How long does it take to clean a roof?Most domestic roofs are cleaned, cleared and treated within a day or so, depending on size, pitch and how much growth has built up. Will cleaning damage my tiles?Not when the method is matched to the covering. Aggressive pressure washing can strip the surface off concrete tiles, which is why we assess the roof first and work as roofers rather than as general pressure-washing contractors. How long before the moss comes back?Physical removal alone allows fairly quick re-growth on shaded roofs. The biocide treatment applied afterwards is what slows it down, and periodic gutter clearance keeps the situation from building up again. Do you clear the gutters as part of the job?Yes. Displaced moss and debris is cleared from gutters, hoppers and down-pipes and outlets are checked, because moss washed off a roof is the most common cause of blocked guttering. Is cleaning worth it if the roof is old?Only if the roof is fundamentally sound. If the covering or underlay has reached the end of its life we will tell you before you spend money, and price the alternative so you can compare. Will you spot problems while you are up there?Yes, that is one of the main advantages of using a roofing contractor. Slipped tiles, cracked pointing, failed flashings and ridge problems get photographed and reported. Is the work insured?Our teams are fully insured and use proper access equipment. All work is backed by our 100% satisfaction guarantee. Do you clean commercial roofs?Yes, for both domestic and commercial customers, including larger and low-pitch roofs where the access plan has to work around the building staying in use. Can you clean the roof before we sell the house?Yes, and it is one of the most cost-effective improvements before marketing. A clean roof removes an obvious question mark for buyers and surveyors. ## Related services ### Gutter Cleaning Leaves, moss and silt cleared from gutters, hoppers and down-pipes by insured roofers with proper access, flow-tested before we leave. It is the cheap… View service→ ### Roof Surveys & Inspections A straight assessment from a working roofing contractor: what needs doing now, what can safely wait, and a written price for both. Photographed throug… View service→ ### Roof Repairs Slipped tiles, broken slates, failed flashings, felt splits and storm damage put right by a fully insured, City & Guilds qualified team. We answer the… View service→ Free, no-obligation quotation ## Book a Free RoofCleaning Assessment We will tell you honestly whether cleaning is the right spend on your roof, and price it in writing with the biocide treatment and gutter clearance included. - 07946 209052 - hlee-sonroofing@outlook.com - Open 24 hours, 7 days a week, including emergencies - Fully insured teams · 100% satisfaction guarantee ### Request your free quotation Takes under a minute. No obligation, no pressure. Family-run roofing contractor based in Sandhurst, covering Berkshire, Surrey, Hampshire and surrounding areas within a 50-mile radius. Domestic and commercial. ### Contact - 07946 209052 - hlee-sonroofing@outlook.com - 12 Yeovil Road, Sandhurst, GU47 0TE - Open 24 hours, 7 days a week ### Services - New Roofs - Roof Repairs - Flat Roofs - Roof Cleaning - Gutter Cleaning - Gutters, Fascias & Soffits - Loft Insulation - Exterior Painting - Chimney Repairs & Repointing - Leadwork & Flashing - Roof Surveys & Inspections ### Areas covered - Sandhurst - Owlsmoor - Crowthorne - Blackwater - Yateley - Camberley - Bracknell - Wokingham - Farnborough - Fleet - Frimley - Ascot © 2026 H Lee & Son Roofing Services Limited. All rights reserved. Cookie PolicyPrivacy PolicyTerms & ConditionsFree, no-obligation quotations · 100% satisfaction guarantee Call nowFree quote We use essential cookies to run this site, plus optional cookies for our enquiry form and chat. See our cookie policy. AcceptEssential only