Signs Your Patio Needs Professional Cleaning

March 2026 • 4 min read

Patios in Frome, Somerset, Bath and the South West take a lot of weather. It’s easy to get used to a dull or slightly green slab until someone slips or you compare it to a freshly cleaned one. Here are the main signs it’s time to book a professional patio clean.

Green or slippery surfaces

If your patio or paving is noticeably green, or feels slippery underfoot (especially when damp), that’s algae or moss. It’s common in shaded gardens and after mild, wet weather. A professional clean removes the growth and makes the surface safe again. We cover how to remove algae and black spots from patios in more detail.

Black spots or dark staining

Black speckles or dark patches are usually lichen or mould. They stick to the surface and don’t brush off. Professional treatment and pressure washing shift them and restore the look of the slabs.

Dull, dirty or discoloured slabs

If the patio has lost its colour and looks flat or grey, it’s often a layer of dirt, pollen and organic matter. Even without obvious green growth, a professional clean can bring back the original colour and texture.

Weeds or moss in the joints

Weeds and moss in the gaps between slabs are a sign that moisture and debris have built up. Cleaning the patio and joints properly reduces regrowth and keeps the area tidier.

It’s been over a year (or two)

If you can’t remember the last time the patio was professionally cleaned, or it’s been more than 12–24 months, it’s worth booking. Regular cleaning is easier and often cheaper than bringing a very dirty patio back to life. See best time of year to clean patios and decking for when to schedule.

Customer FAQs

Will one clean be enough?

For most patios, one thorough professional clean is enough. Very neglected surfaces might need a follow-up or we can advise when we quote.

Do you clean decking as well?

Yes. We offer patio cleaning and decking cleaning across Somerset and Wiltshire.

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