Roof Cleaning Wicklow — Moss Removed. Damage Prevented. Done Properly.
Wicklow's Best Roof Cleaning Company
By the time most Wicklow homeowners call about a roof clean, the moss has been there long enough to start causing real problems. Not just cosmetic ones. Moss that's been sitting on roof tiles for two or three seasons has worked its way under tile edges, into joints, and into the porous surface of the tile itself.
It holds moisture against the tile permanently — and in County Wicklow's wet climate, that moisture doesn't have time to dry out between rainfall events.
At Metro Power Washing, John has been cleaning and treating roofs across County Wicklow for 15 years. The process used here isn't a blast and leave — it's a proper assessment, the correct treatment method for the tile type, a biocidal application that kills organic growth at the root, and a full gutter clean included as standard. Because a cleaned roof with blocked gutters full of moss debris isn't a solved problem.
Roof Cleaning Across All of County Wicklow
Frequently Asked Questions — Roof Cleaning Wicklow
It depends entirely on the tile type and the condition of the roof. For most modern concrete interlocking tiles, a biocidal softwash treatment followed by controlled low-pressure cleaning gives the best results — the biocide kills the growth at the root and the cleaning stage removes the dead material. For natural slate, fibre cement, and older or damaged tiles, softwash only is the correct approach. High-pressure washing on the wrong tile type can displace pointing, crack tiles, and force water into the roof structure. John assesses the tile type and condition before deciding on the treatment method — not after.
Yes — eventually. Moss spores are present in the air and will eventually re-establish on any roof surface. The difference between a properly treated roof and one that's just been cleaned is how long it takes. A roof cleaned without biocidal treatment will typically see moss re-establishing within one to two seasons. A roof treated with a professional biocide, particularly if a post-clean sealant is applied, will stay significantly cleaner for five to seven years in Wicklow's climate before needing attention again.
Not for most jobs. The majority of roof cleaning and treatment work is carried out from ladder positions, scaffold towers, or extending equipment that doesn't require walking directly on tiles. Where roof access is necessary — for ridge tile inspection, for example — John uses roof ladders that distribute weight properly and avoid tile damage. This is discussed during the assessment.
A standard semi-detached or detached house in Wicklow — including biocidal treatment, low-pressure clean where appropriate, and full gutter clean — typically takes between three and six hours depending on the size of the roof, the extent of the growth, and the tile type. Larger properties, more complex roof shapes, or heavily contaminated roofs will take longer. A realistic time estimate is given when quoting.
Honestly — yes, for most Wicklow properties. The cost of a professional roof clean and biocidal treatment is a fraction of the cost of re-ridging a roof with failed mortar, repairing water-damaged rafters, or replacing tiles that have cracked through freeze-thaw spalling caused by untreated moss. A maintained roof lasts longer and the maintenance costs far less than repair or replacement. If your roof has visible moss growth, the question isn't really whether to clean it — it's how long you can afford to wait.
The roof assessment, the biocidal treatment, the cleaning stage appropriate to the tile type, a full gutter clean, downpipe flushing, and clearance of all debris from the property. There are no hidden extras. You'll receive a clear, written quote before any work begins.
Yes. A post-clean sealant treatment can be applied to concrete interlocking tiles after cleaning to further inhibit biological regrowth and provide a degree of weathering protection. This is discussed as an option when quoting — it's not pushed as a default add-on on every job, because not every tile type benefits from sealing equally.
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Tile Types We Work With Across Wicklow
Concrete interlocking tiles — the most common tile type on Wicklow homes built from the 1960s onward. More porous than slate, more susceptible to moss and algae penetrating the tile surface. Respond well to biocidal softwash treatment followed by low-pressure cleaning.
Ridge tiles and hip tiles — assessed for pointing condition during every roof clean. Failed or cracking mortar around ridge tiles is one of the most common causes of water ingress in Wicklow homes and is often identified for the first time during a roof clean.
Natural slate — common on older Wicklow properties and on higher-specification modern builds. Requires a careful, low-pressure approach. Never cleaned with high pressure. Biocidal softwash is the correct method.
Fibre cement slates — increasingly common on Wicklow homes from the 1990s onward, often used as a more affordable alternative to natural slate. Require specific treatment — high pressure and certain chemical concentrations can cause surface delamination.
More Services We Offer Across County Wicklow
Every service below is carried out personally by John, with 15 years of experience behind every job. No subcontractors. No shortcuts. All our pressure washing services are carried out across Wicklow.
Our Long Lasting Roof Cleaning Process
Step 1 — Roof Assessment John inspects tile condition, moss and lichen growth, ridge pointing, verge edges, hip tiles, and lead flashings before a single drop of treatment is applied. You'll know exactly what condition your roof is in before work starts.
Step 2 — Downpipe Protection Downpipes are blocked before cleaning begins to prevent moss debris and treatment runoff from entering your drainage system. A step many operators skip — and homeowners pay for it weeks later.
Step 3 — Treatment Selection Not every roof gets the same treatment. Tile type, age, and the extent of growth all determine the correct method. Concrete tiles, natural slate, fibre cement, and flat roofs each require a different approach. This is where 15 years of experience matters.
Step 4 — Biocidal Application A professional-grade biocide is applied across the entire roof surface. It penetrates the tile, kills moss, algae, and lichen spores at the root, and keeps working after application — not a quick bleach that whitens the surface temporarily.
Step 5 — Low-Pressure Clean Where the tile type allows, a carefully controlled low-pressure wash removes loosened growth after the biocide has worked. Nothing like the pressure used on driveways — precise enough to clean without cracking tiles or displacing pointing.
Step 6 — Full Gutter Clean Every gutter cleared, every downpipe flushed. Included as standard on every roof clean — because a treated roof draining into blocked gutters isn't a finished job.
Step 7 — Final Inspection & Debris Clearance Ground-level inspection on completion. All debris cleared from paths, beds, and the driveway below. John walks you through anything found during the clean that needs attention.
Get a Free Roof Cleaning Quote
If your roof has visible moss, hasn't been cleaned in several years, or you simply want to know what condition it's in — give John a call. The assessment is free, the quote is honest, and the work is carried out to a standard that holds up in Wicklow's climate.