Best decking cleaner 2020: 6 top buys for a spotless deck

The best decking cleaner will have your deck ready for summer in no time. Choose from our favourite deck cleaners

decking cleaner: garden landscaping final touches
(Image credit: Shutterstock)

The best decking cleaner will make your deck look as good as new, and the effect should last throughout the cold and rainy autumn/winter season. There's still time to give your deck one final scrub before the wet weather sets in for good – you'll see less algae buildup next spring, too.  

We've created the ultimate guide to decking cleaners to ensure your outdoor space looks fresher than ever. This way you can enjoy the warm weather worry-free and when the time comes, you can show off your sparkling (not so new) deck to your friends. Think of the summer parties...

Mostyou simple spread and leave, though some products will need a bit of scrubbing. Scroll on to see our top choices, then check out our buying guides to the best decking oils and the best decking paints to complete the look.

The best decking cleaner: 5 top picks

Pro-Kleen Simply Spray & Walk Away is the best decking cleaner for stubborn mould

1. Pro-Kleen Simply Spray & Walk Away

Best decking cleaner spray: remove stubborn mould or moss with ease

Specifications
Size: 5 litres
Time it takes to see results: 48 hours
Eco-friendly?: Harmful to aquatic life
Reasons to buy
+Non-acidic  +Can be used on virtually any surface+Works straight away

Mould or moss needn't destroy your decking's good looks; it can be easily treated with a spray cleaner like this one. This deck wash is low-maintenance and non-acidic, it won’t damage your decking in the cleaning process. It’s biodegradable and not harmful to kids or pets, either, so all you need to do is spray it on the affected areas and leave it to work its magic. Users have confirmed they saw results within three days of application, without having to scrub or apply any extra elbow grease.

Ronseal Decking Cleaner & Reviver is the best decking cleaner for reviving timber

2. Ronseal Decking Cleaner & Reviver

Best decking cleaner for reviving timber decking: it will look as good as new with this cleaning formula

Specifications
Size: 5 litres
Time it takes to see results: 30 minutes
Eco-friendly?: No
Reasons to buy
+Opens up the pores of the wood +Fast-acting 
Reasons to avoid
-Need to use plenty of product for it to work

If you’ve got timber decking, then this deck cleaner could be the best thing to revitalise it before you re-coat it. It is potent enough to remove dirt, grease, fungus, stains, algae and mildew, and it opens up the pores of the wood which prepares it for coating with a stain or oil. You can expect your decking to last a lot longer when you treat it with this cleaner whenever it needs it. Users have said it only takes 30 minutes (with the addition of a good scrubbing) to see a difference.

Dirtbusters Spray Today Gone Tomorrow is the best commercial strength formula decking cleaner

3. Dirtbusters Spray Today Gone Tomorrow

Best strong cleaner for your deck: this commercial formula that doesn’t require any extra work

Specifications
Size: 5 litres
Time it takes to see results: 48 hours
Eco-friendly?: Biodegradable, but take care around plants and ponds
Reasons to buy
+No jet washing or brushing required +Can also be used on patios and driveways
Reasons to avoid
-More expensive than other products

For those gardens that have really been neglected over the winter months, this commercial strength decking cleaner could be just the job. You can expect to see maximum results with minimal effort, as all you need to do is mix the formula, spray it on to your decking, then leave it. There is no need to scrub the decking or use a jet washer as it is potent enough to work on its own. You can also have peace of mind that this decking cleaner isn’t harmful to aquatic life, and it is biodegradable so it’s safe for children, pets and the environment, too. 

Roxil 100 Decking and Patio Cleaner

(Image credit: Amazon)

4. Roxil 100 Decking and Patio Cleaner

Best decking cleaner for pressure washers: blast away the dirt with this pressure washer cleaning fluid

Specifications
Size: 5 litres
Time it takes to see results: 24 hours
Eco-friendly?: Harmful to aquatic life
Reasons to buy
+Heavy duty cleaner +Prevents algae regrowth+Hose off or leave on
Reasons to avoid
-Takes a lot of product for it to work

If you use a pressure washer to clean your decking but need a little something extra to help remove that stubborn dirt, then this decking cleaner should do the trick. It’s designed for heavy duty cleaning and should remove pretty much any grease, dirt and grime. Don't have/don't want to use a pressure washer? No problem: you can simply apply this deck cleaner and let the rain do its job. Work the cleaner in with a stiff brush for even  better results. The best thing about this cleaner, however, is that it keeps working for months afterwards, preventing regrowth of mould and algae.

The best decking cleaner: Cuprinol

(Image credit: Cuprinol)

5. Cuprinol Decking Cleaner

Best decking cleaner to freshen up: prepare your decking for a fresh stain or oil coat

Specifications
Size: 2.5 litres
Time it takes to see results: 10+ minutes (dry in 16 hours)
Eco-friendly?: No
Reasons to buy
+ Removes dirt, grease and algae 

Every year you should re-stain or oil your decking to ensure it not only looks good but is protected against the elements. If your decking is looking a little neglected, then this decking cleaner is a good place to start so that yours is prepared for summer. The deck wash formula is designed to remove all forms of dirt, grease and even build-up of algae, and will create a smooth blank canvas for you to work on when oiling and staining. It should be applied and scrubbed with a brush to work. Leave it for a few minutes (Cuprinol don't specify how long but we say at least 10) then rinse awar. Leave to dry for the recommended time of 16 hours before taking the next steps to paint and preserve your deck.

C&G Home and Garden Organic Patio & Decking Cleaner

(Image credit: Amazon)

6. C&G Home and Garden Organic Patio & Decking Cleaner

The best organic decking cleaner: a product that's safe for children, pets, and wildlife

Specifications
Size: 1 litre
Time it takes to see results: Straight away
Eco-friendly?: Yes, but take care not to pour directly onto plants
Reasons to buy
+Safe and environmentally friendly+Can also be used on patios and driveways
Reasons to avoid
-Not as strong as other products-Need to apply twice on stubborn dirt

This decking cleaner is one of the safest decking cleaning products on the market: it won't harm either your pets or the wildlife that may visit your garden. It's also super concentrated, to be diluted at a 1:16 ratio, which makes it fairly economical to use. It does work best when applied twice – you will begin to see the best results after you wash it off the second time – and when washed off with a pressure washer. If you don't mind the little bit of extra work, it's a great eco-friendly option that can also be used to clean patios, driveways, and fences. 

How often should I clean my deck? 

Ideally, you should clean your deck every year, preferably in spring, to clear any mould and algae that would've built up during winter. If you're finding yourself needing to clean your deck more than once a year, though, then it might be time to switch up your decking cleaner, as it shouldn't be applied too frequently. 

Can I clean my deck in autumn?

Of course – there's no rule that says you can only clean decks in spring. You'll just need to choose a dry, frost-free day to do it. In fact, giving the deck a once-over ahead of winter will keep it in better condition throughout the cold months 

What is the best decking cleaner?

If you have a tough job on your hands, such as moss or mould growth, a strong solution such as the Pro-Kleen Simply Spray & Walk Away, will do a good job at eradicating it quickly and efficiently. This is rated our best decking cleaner you can buy.

Click to shop the Pro-Kleen Simply Spray & Walk Away at the best price.

  • Once you've chosen the best cleaner for your deck, check out more garden ideas at our dedicated page. 

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