The ‘powerful, quick way’ to clean your patio and ‘kill moss and algae’ without a pressure washer & it only costs £1
THE best time for deep cleaning your patio is early spring.
Martin Stewart, National Trainer at Ryobi has shared several cleaning methods for you to try out this March and April.
He said: “Patios take a beating from the elements, and over time, moss, algae, and dirt build up, making them slippery and unsightly.
“Cleaning them now after damp winter conditions encouraged moss growth, you’ll have a fresh start before summer.
“Then, by late summer (August–September), after months of foot traffic, grease, and grime, a second deep clean will keep your patio in top shape.
“The only time to avoid cleaning is during extreme heat, as cleaning solutions evaporate too quickly to work effectively.”
How to clean your patio
Martin said: “A thorough clean starts with preparation.
“Clear the space by moving any furniture, plant pots, or loose debris to get full access to the surface.
“Before using water, grab a stiff-bristled broom and sweep away dirt, leaves, and moss.
“Once the surface is clear, choose your cleaning method based on the level of grime.
“Apply your chosen cleaner, leave it to soak in for the recommended time, then scrub with a stiff brush or use a pressure washer if you have one for deep stains.
“Finally, rinse thoroughly with water and let the patio dry naturally.”
What products to use?
White Vinegar
Pros: A natural, eco-friendly option for lifting dirt and mild stains. Safe for plants when used in moderation.
A bottle of white vinegar costs £1.15 from a supermarket.
Cons: Less powerful than bleach and may require multiple applications.
Avoid using on limestone as it can cause damage.
Bleach (Diluted, 1:5 with Water)
Pros: A powerful, cheap, and quick way to kill moss, algae, and lichen. Works fast on stubborn stains.
A bottle of bleach can cost as little as 70p from a supermarket with leading brands around £1.
Cons: Can damage plants, erode grout, and harm certain paving materials like limestone.
Bleach also has strong fumes and can be bad for the environment and your health.
Always test a small area first and wear protective clothing.
Specialist patio cleaning tools
Using bleach or white vinegar might be a cheap method to clean your patio, but depending how dirty your slabs are, you could spend hours on your knees scrubbing, or bending over with a brush and brute force.
There are several specialist patio cleaners – albeit pricer than DIY alternatives – that require very little effort.
Ryobi 18V ONE+ Cordless Patio Cleaner – £129.99
Designed for patios, making them highly effective for tackling stubborn dirt, algae, and deep stains. Many formulas are pet-friendly and biodegradable.
Ryobi 18V ONE+ HP Cordless Brushless 41Bar Power Washer – £159.99
Cleans patios quickly and effortlessly, removing dirt, moss, and stains without chemicals. Powerful, versatile, and great for deep cleaning.
If you are using a pressure washer, Martin had some advice.
He said: “A pressure washer is a fast and efficient way to remove dirt, moss, and stains without chemicals.
“However, high-pressure washing can be harsh on patios.
“Soft stone surfaces like limestone and sandstone are especially vulnerable, and excessive pressure can erode surfaces, dislodge grout, or wash away jointing sand between slabs.
“To avoid damage, always start with a low-pressure setting and hold the washer at least 30cm away from the surface.
“Work in sweeping motions rather than focusing on one spot to prevent erosion.
“If jointing sand is removed during cleaning, reapply kiln-dried sand once the patio is dry to stabilise the slabs and prevent shifting.”