How do I remove green algae from my patio?

Green algae growth on outdoor surfaces is a problem for homeowners throughout the UK.

Find out all you need to know about green algae, why you have it on your patio, how to remove it, and how to prevent it returning.

Why do I have green algae on my patio?

Green algae will normally form on areas of your patio where light is restricted.  Under the shadow of trees where rainwater lingers is the perfect setting for green algae to thrive.

Affected surfaces become slimy when wet. This causes a slip hazard where accidents can potentially happen. If algae is left to dry over the summer it will turn black and make the patio look dark and dirty, providing ideal conditions for the process to begin again the following winter.

In damp but mild conditions, green algae can be prolific!

How do I remove green algae from my patio?

Available methods of algae removal:

  1. Power washing: this will remove the algae but may also damage the patio surface and grout creating more work.
  2. The easy solution is to apply a proprietary algae remover / inhibitor.

Choose your algae remover carefully as there are many products available that are simply derivatives of bleach. These will remove the colour of the algae but not remove the problem. Solve the problem correctly with an effective spray-on algae killer.

We have developed a range of stone care and cleaning products which have been designed to help you solve common problems such as green algae on your patio. Our Rob Parker’s Best Algae Remover and Patio Reviver will kill green algae. This treatment will kill and remove the green slimy stains, restoring your patio.

Rob Parker’s Best Algae Remover and Patio Reviver

Rob Parker’s Best Algae Remover and Patio Reviver
From £11.40/Each

How can I stop green algae from growing on my patio?

Using a specific algae killer such as Rob Parker’s Best Algae Remover and Patio Reviver, will not only kill the green algae that are present; it also provides residual protection to the paving for up to 12 months preventing further algal growth.

The product works gradually. Over a period of days, daily improvement can be seen in the stone surface. The product works in conjunction with atmospheric conditions (sun, rain and air temperature) giving ongoing protection against further build-up of green algae throughout the season.

Furthermore, if the product is applied every year, at the same time, the problem can be permanently solved.

Use Rob Parker’s Best Algae Remover and Patio Reviver as a preventative measure

At Stoneworld, we apply Rob Parker’s Best Algae Remover and Patio Reviver to our paved areas every September as a preventative measure. When the weather begins to turn damper and cooler at the beginning of Autumn, green algae can take over. Protect your patio against growth through the winter rather than allowing algae to grow and then killing the algae once you have it.

How do I apply Rob Parker’s Best Algae Remover and Patio Reviver?

Using our product is easy!

Simply spray onto affected surfaces using a garden sprayer.

The product is sold in small 250ml bottles that we ask you to dilute with 8 litres of water before use. This makes enough to cover 25 square metres. 

Our Rob Parker’s Best products have been designed alongside a chemist, to ensure you get fantastic results with each product.

Products in the range

Rob Parker’s Best Algae Remover and Patio Reviver
From £11.40/Each
Rob Parker’s Best Patio Sealer
From £35.00/Each
Rob Parker’s Best Patio Cleaner
From £17.50/Each
Rob Parker’s Best Colour Enhancing Sealer
From £35.00/Each
Rob Parker’s Best Rust Remover
From £26.50/Each
Rob Parker’s Best ConClear
From £14.75/Each
Rob Parker’s Best Stone Stripper
From £35.00/Each

If you have any questions, please call us on 01844 279274 or email us at and our team will be happy to help.

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