Persistent damp from wind-driven rain and coastal exposure encourages moss and algae on roofs across the west of Ireland. These growths hold moisture against slates and tiles, speeding weathering and blocking water flow into gutters and valleys. Regular cleaning restores drainage and reduces the weight load on older roof structures typical in Galway and surrounding counties.
Work begins with a visual check of pitch, covering type and any damaged areas. Technicians then apply approved biocides to kill surface growth before gentle removal by hand or low-pressure methods that avoid dislodging ridge tiles or forcing water under flashings. Debris is cleared from valleys and gutters so rainwater runs freely again.
The same approach applies to residential houses, agricultural sheds and small commercial premises. Farm buildings often need extra attention to ridge vents and asbestos cement sheets where present, while town properties in Sligo or Roscommon may require scaffolding or reach-and-clean poles around tight boundaries.
Scope depends on roof size, number of slopes, height and how heavily growth has taken hold. Steep pitches, two-storey buildings and properties near the coast usually take longer because access and safety measures increase.
Technician insight
In Galway, the thing that catches most people out with Roof Cleaning is how quickly wind-driven rain packs moss into the small valleys on 1930s and 1950s slate roofs; once those valleys block, water sits against the slates for weeks and the job turns from a simple clean into a longer drainage repair.
Example Situation
For example, a property may show heavy moss along the north-facing slope after several winters of Atlantic storms. Assessment reveals blocked valleys holding water against the slates. Cleaning removes the growth, clears the valleys and applies treatment so water runs off again.
Roof Cleaning Services We Offer
✓Moss Removal
Hand scraping and collection of thick moss mats from slate and tile surfaces without disturbing the roof covering.
✓Algae and Lichen Treatment
Application of biocide solution followed by rinsing to kill and remove green and black growth on roof planes.
✓Valley and Ridge Clearing
Removal of compacted debris from roof valleys, around ridge tiles and at abutments to restore water flow.
✓Gutter and Downpipe Clearing
Cleaning of gutters, outlets and downpipes connected to the roof to prevent overflow during heavy western rainfall.
✓Soft Washing of Roof Surfaces
Low-pressure wash combined with surfactant to lift embedded dirt and light growth from concrete and clay tiles.
✓Coastal Salt Deposit Removal
Targeted cleaning of salt crusts on roofs within reach of Atlantic spray along the Galway and Mayo coastlines.
How it works
- 1
Initial Assessment
Walk the roof perimeter and inspect from inside the attic where accessible to note covering type, pitch and drainage points.
- 2
Protection and Preparation
Cover nearby plants, windows and paths, then apply biocide where organic growth is present.
- 3
Cleaning Work
Remove moss by hand or soft methods, treat remaining algae and clear valleys and gutters of debris.
- 4
Final Clearance
Remove all waste from site, check drainage and leave the working area tidy.
Pricing
Price depends on roof area, number of slopes, access method and extent of growth.