Roof Cleaning Meath glossary of terms & specs
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- €450 to €1,150for typical semi-detached & detached roof moss removal + biocide in Co. Meath
- 3 to 5 yearsresidual protection from professional soft-wash biocide roof treatment
- Zero walkingon brittle concrete tiles or slates — worked from towers & telescopic poles
- Gutters clearedall downpipes disconnected & vacuumed clean as standard after moss scraping
14 key terms explained in plain English
- Soft-Wash Biocide (DDAC / BAC)
A low-pressure biodegradable quaternary ammonium treatment (Didecyldimethylammonium Chloride or Benzalkonium Chloride) that penetrates porous roof tiles and slates to kill moss rhizoids, algae and lichen spores for 3 to 5 years.
- Profile-Moulded Roof Scraper
Custom metal scraper heads shaped to match specific concrete and clay tile profiles (Double Roman, Mendip, Pantile, flat concrete or slate) mounted on carbon-fibre telescopic poles to detach 95% of moss dry.
- Concrete Interlocking Tiles
The most common roof tile on 1970s–2020s Co. Meath housing estates (e.g. Roadstone, Marley, Tegral). Coated at manufacture with an acrylic glaze or surface granules that must never be blasted with high-pressure water.
- Natural Blue Bangor & Spanish Slate
Metamorphic stone roof slates fixed with copper nails or hooks. Must never be walked on directly; cleaned via telescopic pole scraping and low-pressure soft-wash biocide.
- Fibre-Cement Slates (Tegral / Cembrit)
Man-made smooth slates common on Meath dormer bungalows and country homes. Require gentle scraping and biocide soft-washing to avoid delaminating the factory coating.
- Crustose Lichen (White & Yellow Spots)
Slow-growing symbiotic fungus/algae spots that bond tightly into roof tile pores. High-pressure blasting gouges the tile trying to remove them; soft-wash biocide kills the organism so it releases harmlessly as it weathers.
- Trentepohlia (Red / Orange Algae)
Rust-coloured biofilm that colonises damp north-facing roof tiles and white/cream monocouche render walls across Ireland.
- Gloeocapsa Magma (Black Roof Streaks)
Dark cyanobacteria streaks that feed on limestone filler in roof tiles and shaded wall render.
- Sarking Felt / Breathable Membrane
The secondary waterproof underlay beneath your roof tiles and battens. Pointing a high-pressure lance up a roof forces water over the tile overlaps onto the felt.
- Valley Gutter
The internal diagonal channel where two roof slopes meet (often lined with lead or GRP). The number-one spot where fallen roof moss dams rainwater and causes attic leaks.
- SkyVac Gutter Vacuum
An industrial wet-and-dry vacuum system with rigid carbon-fibre suction poles and a wireless camera that clears moss and silt from gutters up to three storeys high from ground level.
- Monocouche / K-Rend Soft-Washing
Low-pressure biocide and surfactant cleaning of through-coloured silicone or cement house render without scarring the textured plaster.
- Rotary Flat-Surface Cleaner
A shrouded twin-jet spinning deck washer that cleans cobblelock driveways and stone patios evenly without zebra striping or flying grit.
- Kiln-Dried Silica Jointing Sand
Bone-dry graded quartz sand brushed into block paving (cobblelock) joints after pressure washing to re-lock the bricks and inhibit weed seeds.
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Roof cleaning & soft-wash guides & Co. Meath price breakdowns
Straight answers to what homeowners ask most: itemised 2026 costs, material specifications, drainage & planning rules, and what to check before you book.
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Common specification questions
How much does roof cleaning cost in Co. Meath in 2026?
In Co. Meath, manual profile-blade moss removal followed by gutter clearance and a professional soft-wash biocide treatment costs €450 to €650 for a 2–3 bed terraced house, €580 to €850 for a typical 3–4 bed semi-detached house in Navan, Ashbourne, Trim, Dunshaughlin or Ratoath, and €820 to €1,150+ for a 4–5 bed detached house or large bungalow. If you choose a full controlled low-pressure wash for instant same-day colour restoration plus biocide, add €100 to €150.
Is high-pressure jet-washing bad for concrete and slate roof tiles?
Yes — blasting a roof at 2,500–3,000 PSI strips the protective acrylic surface coating and factory sand granules off concrete interlocking tiles (such as Roadstone, Marley or Tegral tiles), leaving the concrete porous so moss grows back twice as fast and frost can crack the tile. High-pressure lances pointed up the roof also drive water over the tile overlaps onto the breathable sarking felt, risking attic leaks, and walking directly on unsupported tiles snaps brittle nibs. Safe roof cleaning in Meath uses profile-shaped telescopic scrapers and low-pressure soft-wash biocide from scaffold towers and roof ladders.
How does soft-wash biocide roof treatment work and how long does it last?
After 95% of bulky moss cushions are physically scraped from the tile faces and overlaps using custom-moulded blades, the roof is saturated at low pressure (garden-hose pressure) with a biodegradable quaternary ammonium biocide (DDAC/BAC). The biocide penetrates microscopic pores in concrete and slate, killing remaining moss rhizoids, green algae, black biofilm and white/yellow lichen spores at the root. Over the following weeks, rainfall naturally washes away dead organic matter and the residual barrier prevents moss regrowth for 3 to 5 years.
Will scraping roof moss block my gutters and downpipes?
Never when done properly. Before scraping starts, our local Meath specialist disconnects or plugs every rainwater downpipe outlet so zero moss can enter your underground storm drains. Once the roof is scraped, all gutters are emptied using a high-reach gutter vacuum and hand tools, all fallen moss is bagged and removed from site, and your patios, footpaths and windows are rinsed clean.
Roof cleaning & moss removal across Co. Meath & bordering areas
Requests across Co. Meath and neighbouring commuter areas go to one local specialist — covering Navan, Ashbourne, Trim, Dunshaughlin, Ratoath, Kells, Drogheda, Enfield, Laytown-Bettystown, Stamullen, Athboy, Oldcastle, Slane and bordering towns. Compare all areas covered →
Ready to clear roof moss safely without damaging your tiles?
One local specialist covering Co. Meath inspects your roof from the ground or ladder, confirms the exact price for manual scraping and soft-wash biocide, and clears every gutter before leaving.