How to remove green algae from patio tiles

Green algae on patio tiles can be effectively removed using specially developed products. We offer green algae remover solutions in both concentrate and ready-to-use formats, which are suitable for patios and other outdoor hard surfaces. You may come across household remedies online such as cleaning vinegar, green soap or hydrogen peroxide, but we advise against using these. Green algae control falls under biocide regulations, and as an authorised supplier we recommend only legally approved products. Green algae is typically caused by moisture, lack of sunlight, organic debris and poor drainage. Regular cleaning and preventative measures will help reduce regrowth.

HG solutions for removing green algae from patio tiles

To effectively remove green algae from patio tiles, we recommend the following solutions:

• HG algae and mould remover (concentrate): Dilute 1 litre of product with 20 litres of water and apply during dry weather by spraying, pouring or brushing onto tile paths, flagstones and other hard surfaces. After a few days, remove the dead algae by hosing down or scrubbing. A follow-up treatment helps prevent regrowth for several months. When diluted, the product is safe for grass and plants.
• HG algae and mould remover (ready-to-use): A pre-mixed solution for quick and easy application on patios and balconies. Apply during dry weather by pouring over the surface. Scrubbing or rinsing is not required. Results are visible after approximately 36 hours. Suitable for all surfaces, covering between 25 to 50m².

For more information, see our guide on how to remove green deposits.

Solutions for removing green algae from patio tiles

Various household remedies are often suggested online. We strongly advise against these due to regulatory and effectiveness concerns. However, the most common include:

• Cleaning vinegar diluted and applied to tiles, followed by scrubbing
• Green soap solutions used with a brush
• Hydrogen peroxide applied directly and scrubbed

These methods are not proven to be effective and may damage surfaces or fail to prevent regrowth. Always check the maintenance instructions from your patio tile manufacturer beforehand. The methods mentioned above don't always deliver the desired result and can carry risks. We therefore recommend choosing a legally approved product specifically developed for green algae control.

Causes of green algae on patio tiles

Green algae growth is caused by:

• Moisture: Persistently damp surfaces encourage growth
• Lack of sunlight: Shaded areas promote algae
• Organic debris: Leaves and dirt support development
• Poor drainage: Standing water increases risk

To reduce algae growth, improve drainage, remove debris regularly and clean surfaces with suitable products. Ensure good drainage of your patio tiles so water drains away quickly. Regularly remove organic debris from the tiles, such as leaves and soil. Where possible, prune overhanging branches or shrubs that create shade on your patio tiles. Clean your patio tiles regularly with a pressure washer or a specially developed cleaning product to inhibit algae and moss growth.