The Hidden Damage Algae & Moss Cause to Cornwall Homes — And Why You Should Act Now
If you live in Cornwall, you’re already familiar with how quickly algae, moss and grime build up on your property. Our coastal climate is beautiful, but the mix of sea air, moisture and shade creates the perfect environment for organic growth. What many homeowners don’t realise is how much hidden damage this growth can cause—not just to the appearance of your property, but to the materials that protect it.
At Cornwall Exterior Cleaning, we see the effects every day. What begins as a bit of green on the wall or some moss on the roof can turn into long-term issues if left untreated.
Here’s why tackling algae and moss early isn’t just cosmetic—it’s essential for protecting your home.
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1. Moss Damages Roof Tiles & Shortens Roof Lifespan
Moss might look harmless, but it’s one of the most destructive things growing on Cornwall roofs.
What moss does:
Lifts and cracks tiles
Holds water against the roof surface
Causes frost damage in winter
Blocks gutters with fallen debris
Creates perfect conditions for leaks
Left untreated, moss can reduce the lifespan of your roof by years.
Our soft wash roof cleaning and biocide treatments kill moss at the root, keeping your roof cleaner for much longer.
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2. Algae Makes Render Look Old & Causes Staining
Most modern Cornish homes use K-Rend, Weber or monocouche render—surfaces that attract algae fast.
Problems algae causes on render
Deep green staining
Black streaking
Patchy discolouration
Permanent shading marks
Moisture retention in the surface
A proper soft wash render clean removes algae gently without damage (unlike pressure washing, which can crack render).
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3. Slippery Decking & Patios Become a Safety Hazard
One of the biggest causes of slips in Cornwall homes?
Algae-covered decking and patios.
Cornish weather creates perfect conditions for slippery growth on:
Timber decking
Composite decking
Patios
Paths
Steps
Driveways
A professional pressure wash or soft wash treatment restores grip and makes your outdoor areas safe again.
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4. Gutters Block Faster in Cornwall Than Most Places
The combination of coastal debris, heavy rainfall and moss falling from roofs means Cornwall guttering blocks faster than inland areas.
Blocked gutters cause:
Damp patches inside walls
Overflowing rainwater
Rotten fascias and soffits
Foundation damage
Internal mould growth
Our gutter vacuum cleaning keeps your drainage running smoothly.
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5. Holiday Lets Need Regular Exterior Maintenance
If you own a holiday home or Airbnb, exterior appearance has a direct impact on:
Guest satisfaction
Reviews
Booking rates
Property value
Clean decks, patios, walls and driveways instantly improve kerb appeal and guest experience.
Many holiday let owners book seasonal cleaning packages to keep the property guest-ready year-round.
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6. Regular Exterior Cleaning Prevents Expensive Repairs
A small investment in exterior cleaning can save thousands in future repairs.
Regular cleaning helps avoid:
Roof replacements
Render repainting
Driveway resurfacing
Gutter repairs
Timber rot
Damp treatments
Exterior cleaning isn’t a luxury—it’s property protection.
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Why Choose Cornwall Exterior Cleaning?
We’re a proud local Cornwall business, covering:
Padstow • Wadebridge • Newquay • Truro • St Austell • Bodmin • Camborne • Redruth • Falmouth • Penzance • Liskeard • Bude • Launceston and all surrounding areas.
We specialise in:
Pressure washing
Soft washing
Roof cleaning
Gutter clearing
Decking cleaning
Patio & driveway cleaning
Render soft wash cleaning
Holiday let exterior maintenance
Safe methods, long-lasting results, and friendly local service.
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Ready to Protect Your Property? Book Your Clean Today
Whether your home needs a light refresh or a full exterior transformation, we’re here to help.
📞 Contact Cornwall Exterior Cleaning for a free, no-obligation quote today.
Let us take care of your property—so it takes care of you.
