Does your render look pale green or dark? If yes!! Then go through this guide

Render is a type of plaster used to finish walls and ceilings. It is a mix of cement, sand, and lime and is a popular choice for homes in the UK. It is generally made from Portland cement, but it can also be made from lime or gypsum. It’s a popular choice for finishing the outside of buildings because it’s weather-resistant and low-maintenance. However, render can be susceptible to algae and other types of growth.

While render can last for a long time, it will eventually need regular cleaning to keep its appearance fresh. Over time, render can accumulate dirt, grime, mildew, and algae, leaving surfaces looking dirty or stained. Render cleaning is not a difficult task, but it does require the use of the right products, techniques and expertise.

Cleaning render is important to keep it looking at its best and to prevent any damage to the underlying structure. There are a number of ways to clean the render. The best cleaning method will depend on the kind of growth on your render and how widespread the problem is.

Removing algae by render cleaning

Why the colour of your render looks pale green or dark?

We often get this question, First of all that pale green or dark colour is algae on your render. Minor Algae does not hurt anything but left unattended can damage render & stone facades including Sandstone, Bluestone, Art Deco style render and brick.

How to clean it?

Algae growth on render is unsightly and can be difficult to remove. There are a few different methods you can use to clean algae from the render, including pressure washing, scrubbing with a brush, and using a chemical cleaner.

Pressure washing is the most effective way to remove algae from the render. However, it is also the most destructive and can damage the render if not done carefully. If you decide to pressure wash your render, be sure to use a low-pressure.

Scrubbing with a brush is another effective way to remove algae from the render. A stiff bristled brush will work best. Be sure to wet the render beforehand to avoid damaging it.

Using a chemical cleaner is also an effective way to remove algae from the render. There are many commercial products aimed at cleaning and maintaining render. You can find specialised render cleaners, bleach-based algae removers, and mould/mildew removers. Be sure to follow the instructions on the label carefully, as some cleaners can be harmful to plants and animals if used improperly.

If you have an algae problem that is especially stubborn, you may need to resort to a more powerful cleaner. Bleach can be effective at killing algae, but it can also damage the render.


In conclusion, algae can be cleaned by a number of methods. The most effective method will depend on the type of algae and the severity of the infestation. While chemical cleaners can be very effective at killing and removing algae growth, they can also be harmful to the environment if misused. It’s important to carefully follow the directions when using chemical cleaners and to avoid over-applying the product. Physical removal is another option, but it is often less effective than chemical cleaners.

If you are unsure about how to clean that pale green colour on your render, then it is best to seek professional help. Get in touch with our professionals for a free render cleaning estimate. We’ll have your Render looking like new again in no time!