Can I Use Bleach To Clean My Decking?

M. John

Cleaning your wood, composite or plastic decking is one way to maintain it. Regular cleaning of your decking board will ensure that stains and dirt are not on it. Soap, vinegar and bicarbonate of soda are the common decking cleaners homeowners can use. This is because they help to remove dirt and stains from your decking. Some people also make use of bleach in cleaning their decking. What is bleach? Is bleach good to clean your decking? 

What is Bleach?

What is bleach? Bleach can be a solid or liquid chemical used in removing stains from surfaces. There are also natural items like lemon juice that have bleaching properties. But in this write-up, we are focusing on chemical bleach and whether you can use it to clean your decking. 

Bleach is a common cleaning agent in households as it is very effective in removing stubborn stains. It has a whitening and brightening effect, thereby making it good for cleaning. Bleach is also used as a disinfectant in homes to kill germs. Some people also use it to clean their wood decking.

 Some people also use bleach to remove stains or discolourations from their clothes. Bleach removes stains by creating a chemical reaction with the stains, thus making the affected area spotless.

Types of Bleach

There are different types of bleach used in cleaning. Chlorine bleach, calcium hypochlorite, and hydrogen peroxide are the various types of bleach used in cleaning. There are two main types of bleach to choose from when cleaning your decking, chlorine bleach and oxygen bleach.

Chlorine Bleach

Chlorine bleach contains sodium hypochlorite and usually comes in a liquid and powdered form. The bleach is very powerful and is used cautiously in cleaning. Since chlorine effectively kills germs, some homeowners use the diluted chlorine bleach to kill mould and mildew on their decking. Some even use bleach to clean their decking to look new and spotless. 

Oxygen Bleach

Oxygen bleach is another type of bleach that is milder than chlorine bleach. It is used in removing stains from clothes. Some homeowners also use oxygen bleach to remove stains from their wood decking. Is bleach safe for cleaning your decking? 

Is Bleach Good to Clean your Decking

Can I Use Bleach To Clean My Decking?

Chlorine bleach is a powerful bleach, effective in removing stains and killing mould, but it can also wreck your decking. If you use chlorine bleach to clean your wood or composite decking, the bleach will damage the surface texture. 

When you use bleach to clean your decking, it will break down the glue that holds the wood fibres. These will cause more harm to your decking rather than good. Chlorine bleach can damage your composite decking and also wood. Apart from that, bleach can damage plants, and it’s also harmful to pets.

On the other hand, Oxygen bleach is milder than chlorine and effective in removing dirt from decking. The bleach is also effective in removing mould and mildew from your decking surface. Unlike chlorine, oxygen bleach is also non-toxic to plants and pets. 

Since oxygen bleach is milder than chlorine, can you use it to clean your decking? Oxygen bleach is safe for cleaning decking since it breaks down into oxygen and soda ash. It doesn’t damage the decking material like the chlorine bleach. Most decking cleaners contain oxygen bleach to aid in removing stains. 

To use oxygen bleach to clean your decking, pour the diluted bleach on your decking and use a bristle brush to scrub the decking. Scrub the decking still until it’s clean, and then rinse it with clean water. For removing mould and mildew, pour the oxygen bleach on the affected part and allow it to stay for about 10 to 15 minutes. Then use a bristle brush to scrub the mould away.

The Best Decking Cleaner

Bleach is not the only cleaner for deckings. There are other cleaners you can use to maintain your decking board. These cleaning agents are mild and safe to use to clean both wood and composite decking. 

Ammonia free liquid soap and water are very effective and safe for cleaning deckings. They are also non-toxic to plants and pets. It is effective in removing stains from your deck surface. If there is mould on your decking, bicarbonate of soda and diluted vinegar are the best options. They are natural decking cleaners and very efficient in killing moulds and mildew on wood or composite decking. 


Can I use bleach to clean my decking? Chlorine bleach is more unsafe for cleaning deckings than oxygen bleach. However, soapy water, bicarbonate of soda and diluted vinegar are very effective and safer for cleaning deckings.



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