- North Wales, Cheshire, Wirral & surrounding areas
If you've noticed moss growing on your roof, you're probably wondering whether it's simply cosmetic or something that needs dealing with. While a small amount of moss may not seem like a problem, excessive moss growth can trap moisture, block gutters and shorten the lifespan of your roof.At Onyx Roofing, we provide professional roof moss removal, roof cleaning, and roof maintenance across North Wales, Flintshire, Denbighshire, Cheshire, and the Wirral, helping homeowners protect their roofs without causing unnecessary damage.
Moss thrives in damp, shaded conditions and is particularly common on roofs that receive little direct sunlight. Over time, moss absorbs and retains water, allowing it to spread across roof tiles.
Common causes include:
• North-facing roofs
• Overhanging trees
• Poor drainage
• Older roof tiles
• Damp climates
If left untreated, moss can continue to grow year after year.
Regular roof maintenance helps prevent these issues before they become expensive roof repairs.
Yes.
Although moss itself doesn't usually cause an immediate leak, allowing large amounts to build up can create several problems.
Heavy moss can:
• Hold moisture against roof tiles
• Lift the edges of tiles
• Increase the chance of frost damage during winter
• Block gutters and downpipes
• Cause water to overflow onto fascias and soffits
• Encourage further biological growth such as algae and lichen
One of the biggest mistakes homeowners make is hiring someone who offers jet washing or pressure washing for roof cleaning.
While it may make the roof look clean initially, high-pressure washing can cause serious damage.
Jet washing can:
• Strip away the protective surface coating from roof tiles
• Force water underneath the tiles
• Damage under-felt and cause leaks
• Damage pointing and mortar
• Shorten the lifespan of your roof
• Dislodge ridge tiles
• Crack older concrete and clay tiles
• Make roof tiles porous
Many roofs that have been pressure washed begin experiencing problems months later.
For this reason, Onyx Roofing does not use jet washing to clean roofs.
Instead of pressure washing, we use a much safer and longer-lasting method.
Our roof moss removal service includes:
Hand scraping: We carefully remove moss by hand using specialist roof scraping tools that match the profile of your roof tiles.This safely removes the moss without damaging the tiles.
Full Moss Removal: All loose moss is collected and removed from the roof. We also clear your valleys, gutters, downpipes and roof edges. This prevents blockages and ensures rainwater can drain correctly.
Professional Moss Treatment: Once the roof has been scraped clean, we apply a professional biocide moss treatment.This treatment:
• Kills remaining moss spores
• Removes algae
• Helps eliminate lichen
• Slows future moss growth
Over the following months, weather naturally washes away the remaining staining, leaving the roof looking cleaner and helping keep it moss-free for much longer.
In most cases, yes.
Removing moss helps:
• Extend the life of your roof
• Reduce future maintenance costs
• Prevent blocked gutters
• Improve kerb appeal
• Reduce moisture retention
• Protect your roof during winter
It's a relatively small investment that can help avoid much more expensive roof repairs later on.
We cover the areas of North Wales, Chieshire, Wirral and surrounding areas.
If you're searching for roof moss removal in North Wales, roof cleaning in Flintshire, roof moss removal in Chester, or roof cleaning in the Wirral, we're here to help.
• Holywell
• Bagillt
• Greenfield
• Flint
• Mold
• Buckley
• Connah's Quay
• Prestatyn
• Rhyl
• Denbigh
• St Asaph
• Wrexham
• Ruthin
• Deeside
• Hawarden
• Northop
• Mostyn
• Caerwys
• Chester
• Ellesmere Port
• Neston
• Heswall
• West Kirby
• Hoylake
• Bromborough
• Bebington
• Birkenhead
• The Wirral
• Cheshire