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Over time, your Dublin roof becomes a breeding ground for thick moss, lichen, and algae. While this green growth is unsightly, its real danger lies in how it holds moisture, accelerating the decay of your tiles and leading to water ingress, tile lifting, and expensive repairs.
At Capital Roofers, we specialise in safe, professional roof cleaning and moss removal services across Dublin. We don't just blast the roof; we apply specialist, low-pressure, and chemical treatments to eliminate deep-rooted growth, extending your roof's lifespan and instantly boosting your home’s curb appeal.
Moss and lichen are not merely aesthetic problems; they pose a real threat to your roof structure in the Irish climate:
Trapped Moisture: Moss acts like a sponge, holding water against your slates or tiles. This prevents the roof from drying out and significantly increases the risk of damp penetration into the underlying structure.
Tile Damage: During colder months, the water trapped by the moss freezes and expands (the freeze-thaw cycle), causing tiles and slates to crack, break, or lift off the battens.
Gutter Blockages: As moss and debris wash off in heavy rain, they accumulate and create severe blockages in your gutters and downpipes, leading to overflowing water and façade damage.
Added Weight: Heavy, water-saturated moss adds significant, unnecessary weight to your roof structure.
We use methods designed to be tough on moss but gentle on your roof materials, preserving their integrity and finish. We never use high-pressure washing, which can severely damage tiles, erode granular surfaces, and force water beneath the slates.
Preparation and Safety: We set up safe access and protect the surrounding areas, including gardens, walls, and driveways, from debris and run-off.
Manual Moss Scraping: We start by manually and carefully removing the bulk of the heavy, thick moss by hand using specialist tools that avoid damage to the roof surface.
Soft Wash Treatment: We apply a professional, low-pressure soft wash solution to clean the remaining surface dirt and algae without eroding the tiles.
Biocide Application: The most crucial step. We apply a long-lasting, deep-penetrating biocide treatment. This solution kills the residual moss spores, lichen, and algae roots deep within the pores of the tiles, preventing re-growth for years.
Clean-Up: We meticulously clear and dispose of all removed moss and debris, including clearing and rinsing your gutters and downpipes to ensure they are free-flowing.
High-pressure washing is highly damaging to roof tiles. It can:
Erode the granular surface of concrete tiles, significantly reducing their lifespan and water resistance.
Lift and dislodge slates or tiles, forcing water into the underlying felt and structure.
We use a soft wash/low-pressure rinse combined with manual removal and a biocide treatment. This safe, non-abrasive method cleans the surface effectively while killing the deep-rooted moss spores, guaranteeing a safer, longer-lasting result.
We ensure your property is left spotless. All moss and debris that are manually scraped from the roof are collected and carefully lowered to the ground. We bag all waste material and remove it from your site for responsible disposal. We also thoroughly flush and check your gutters and downpipes to ensure they are clear of any residual debris before finishing the job.
Scaffolding is not usually required for cleaning, which helps keep costs down. Our team uses robust, secure ladders with safety harnesses and specialised roof ladder systems to ensure safe access and compliance with all working-at-height regulations. We prioritise safety without sacrificing the quality of the clean.
For a standard three-bedroom Dublin house, the complete cleaning and biocide application typically takes one full day (5 to 8 hours). However, this depends on the size of the roof and the severity of the moss growth. We always factor in time for safe setup, meticulous removal, and the final clearing of the gutters.
Get a free, no-obligation roof inspection and quote today.
We’ll assess the issue, show you photos of the problem areas, and provide a clear written estimate — no hidden surprises.
If you have any leaky roof problems that have to be fixed fast or a leak in your gutter, we are the local roofing company for you!
Capital Roofers is your trusted local roofing specialist, providing expert roof repairs, replacements, and guttering services across Dublin. High-quality roofing solutions built to last.
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