Safe moss and lichen removal with biocide treatment to protect tiles and stop regrowth.
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Understanding the best ways to care for your roof tiles ensures long-lasting protection against structural leaks and organic damage. Below are detailed answers to the most common questions we receive regarding our professional roof cleaning services.
Yes, using high-pressure jet washing directly on roof tiles can cause severe, irreversible damage. High pressure strips away the protective granular surface coating of concrete and clay tiles, significantly shortening their lifespan and making them more porous. Furthermore, forced high-pressure water can easily penetrate underneath tile laps, leading to saturated roof battens, compromised underlay, and indoor dampness. At GES, we never blast your roof with high pressure; instead, we hand-scrape moss and apply dedicated soft-washing biocide treatments or ultra-low pressure steam.
We prioritize the structural integrity of your roof and safety above all else. Wherever possible, our technicians perform the cleaning process using specialized, long-reach telescopic equipment operating from stable tower scaffolding, hydraulic cherry pickers, or secure ladders fitted with roof-edge protection. If accessing certain sections requires stepping onto the roof, our trained team uses heavy-duty roof ladders and load-spreading crawling boards to distribute weight evenly, ensuring no tiles are cracked or broken during the job.
Before we begin scraping moss or applying treatments, we take comprehensive precautions to protect your home and garden. We completely seal off all downpipes and gutter outlets with heavy-duty caps to ensure no moss or debris causes subterranean drainage blockages. All surrounding ground areas, flowerbeds, patios, and glass extensions are covered with protective sheeting. Once the manual moss removal is finished, we clear all gutters and bag up and dispose of all organic waste off-site, leaving your property spotless.
Our soft-wash biocide treatment provides both immediate and progressive results. Once the heavy surface moss is manually scraped off and the chemical solution is applied, all remaining micro-spores, lichens, and black spot fungi are killed instantly. Over the following weeks and months, natural rainfall gradually washes away any remaining microscopic organic residue, continuously brightening and self-cleaning your tiles until their true natural color is completely restored.
Because our specialist biocide treatments soak deep into the pores of your tiles to kill moss spores and lichen roots, the results last significantly longer than standard water washing. On average, our roof cleaning and anti-fungal treatments keep roofs clear of moss and organic growth for 3 to 5 years. The exact duration depends on surrounding factors like tree canopy overhang, sunlight exposure, and local damp levels.
Yes, we use professional-grade, eco-friendly biocides designed specifically for exterior roof care. Before applying any solution, we thoroughly pre-soak surrounding lawns, plants, and shrubs with fresh water to prevent chemical uptake. During application, we carefully control spraying patterns to avoid overspray. Once the treatment has fully absorbed into the roof tiles and dried, it is completely harmless to pets, wildlife, and children.
Moss acts like a natural sponge, absorbing massive amounts of rainwater and holding constant moisture directly against your roof tiles. During freeze-thaw cycles in winter, this trapped water expands, causing tiles to crack, spall, and delaminate. Additionally, heavy moss growth frequently dislodges during storms, sliding down into gutters to cause severe blockages, overflowing water, damp walls, and compromised fascia boards.
You do not necessarily need to be at home while the work is being carried out, provided we have clear access around the perimeter of your property and an active outdoor tap connection. However, we do ask that all windows remain closed, driveways are cleared for our access equipment, and pets are kept indoors during the spraying process.
Yes, we specialize in low-pressure steam cleaning and soft washing for historic properties, listed buildings, and delicate natural slate. Natural slate and older clay tiles require an exceptionally gentle touch. By utilizing specialized DOFF steam cleaning—which uses high temperatures up to 150°C at gentle, low pressure—we can thoroughly sanitize and clean historic roofs without using harsh chemicals or risking tile breakage.
Roof cleaning costs vary depending on several key factors, including the pitch and height of your roof, the type of tile (concrete, clay, slate), the severity of moss infestation, and the required access equipment (scaffolding vs. cherry picker). We offer free, no-obligation quotes following a thorough remote digital inspection or an on-site evaluation to provide a transparent, fixed price.
Accumulated moss, lichen spores, and dark atmospheric staining not only spoil the aesthetic appearance of your property but also pose a threat to its structural integrity. Heavy moss retains large amounts of rainwater, putting unnecessary weight on your roof structure and causing frost damage to tiles during freezing winter temperatures. At GES Exterior Cleaning, we specialize in safe, gentle roof restoration methods, combining precise manual moss scraping with specialized soft-wash biocide treatments and low-pressure steam to restore your roof tiles to pristine condition without risking damage.
Protecting your roofing system requires professional expertise, correct safety infrastructure, and gentle cleaning techniques that preserve the lifespan of your materials. Professional roof cleaning prevents costly structural repairs while dramatically enhancing your home’s appearance.
Saturated moss holds moisture against your roof tiles for extended periods. When winter temperatures drop, this trapped water freezes and expands, causing cracks, surface spalling, and eventual leaks through your roof underlayment into your living spaces.
As moss grows and matures, heavy rains and wind dislodge large clumps into your guttering system. This leads to stubborn downpipe blockages, overflowing rainwater, damp exterior walls, and rotted fascia and soffit boards.
Replacing a roof is one of the most expensive home maintenance projects imaginable. By removing damaging organic growths and applying anti-fungal treatments, you protect the protective surface coating of your tiles, extending their operational lifespan by decades.
A roof covered in thick green moss and black lichen stains gives an entire property an aged, neglected appearance. Deep cleaning restores the vibrant original clay, concrete, or slate tones, instantly improving kerb appeal and adding value if you plan to sell.
Unlike surface dirt, lichens embed microscopic root structures into the tile material. Our specialized soft-washing biocide treatments penetrate deep into these pores, completely neutralizing spores so the roof stays clean for years to come.
Attempting to clean a roof without professional access equipment, harness systems, and tile knowledge is extremely dangerous and often leads to broken tiles and severe property damage. Our fully trained, insured technicians complete the entire job safely and efficiently.
From Epsom and Ewell to Cheam, Banstead and Kingston upon Thames, GES has built its reputation one property at a time — through careful workmanship, clear communication and results customers are happy to recommend.
Based in Stoneleigh near Epsom, we provide exterior cleaning throughout Surrey — including Sutton, Cheam, Kingston, Leatherhead, Reigate and Guildford — as well as South West London and the wider South East. If your property is nearby but not listed, get in touch — we’ll happily confirm whether we cover you.
Speak to Mike and the GES team to arrange your free site survey anywhere in Surrey — from Epsom and Stoneleigh to Wimbledon and Guildford. We’ll recommend the right approach for your surfaces and provide a clear, no-obligation quote.
Free site survey. Clear pricing. No obligation.
No obligation. We only use your details to prepare your quote.
