Best Decking Cleaner & Top 5 Picks For Removing Algae, Moss & Dirt

Best Decking Cleaner & Top 5 Picks For Removing Algae, Moss & Dirt

Best Decking Cleaner & Top 5 Picks For Removing Algae, Moss & Dirt

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We look at some of the the best cleaners for wood decking, unlike decking oil and paint, decking cleaner is used before treating with oil or paint or as a general cleaner between yearly decking treatments

Decking cleaners are crucial when trying to keep your deck in shape. These cleaners help strip away layers of dirt and keep mould and algae from invading your deck, the best part is that in most cases, all you need to do is apply and walk away and within a few days you see good results. They can be used together with a pressure washer for removing dirt first and moss before applying the cleaner. Decking cleaners are used to prepare the deck for other processes like staining and repairs. Finding the best decking cleaner means finding one that works for your specific kind of deck but as you will learn, any of our picks will do the job but we do have a favourite.

There are a number of decking cleaners in the market that you can purchase. Below are examples of some notable decking cleaners that have proven effective. You can read through the buying guide to understand which factors to consider before purchasing a decking cleaner.  By the end of this guide, you can grab the best deck cleaning solution like a professional.

In a hurry? The ULTIMA-PLUS XP Mould & Algae Killer Remover is probably a good choice for most people and can also be used on a range fo other surfaces too. An economical option compared to the rest, this 5-litre concentrate produces 50-95 litres of cleaning solution, which covers a vast 400m2 area.

Best Pick

Highly rated and positive reviews from customers, this product will take 2-3 days to provide results, best of all, you just apply and walk away. On top of that the product also has the following benefits which make it one of the best cleaners currently available.

Highly rated and positive reviews from customers, this product will take 2-3 days to provide results, best of all, you just apply and walk away. On top of that the product also has the following benefits which make it one of the best cleaners currently available.

  • Provides protection from moss & algae for up to several months by forming a protective barrier once dry.
  • The product is biodegradable and 100% safe as it contains no bleach or caustic substances, this means once dry it save for children and pets.
  • Has high concentrations of moss/algae/mould killer to ward of re-growth.
  • The 5-litre container can be diluted to create 50-95 litres which can cover a very impressive 400m2.
  • The solution is suitable for all hard surfaces such as driveways, sheds, fences, wooden garden furniture and even caravans.

Our top 6 decking cleaner that we reviewed including our top picks


Decking Cleaner Buyers Guide

Purchasing the right decking liquid is not hard at all. When you look at your deck you want to see clean wood that has retained its appearance. Before you start any yearly treatments on your deck such as applying decking protector or a coat of applying decking protector or a coat of decking paint restorer, employ the use of the best deck cleaning solution. Depending on the level of dirt on the deck you can use a pressure washer or brush to remove dirt and thick moss from your deck. If you have layers on algae, moss or even lichen which become very slippery and unsightly, then applying a walk away cleaner as there often know, can have it spotless in a few days with the hassle of having to use a scrubbing brush or pressure washer.

Factors to consider

What are some of the factors to consider before you purchase a deck cleaner? Apart from how much you are willing to pay, there are a few factors such as:

Area to be covered

How large is your deck or the hard surface that needs cleaning? Smaller areas take up less cleaning solution compared to larger areas. Large areas may require one or two containers of cleaning liquid. You also need to factor in the level of dirt so as to understand the intensity of cleaning required. Large areas that need intense cleaning may benefit from the use of a pressure washer instead first and maybe even 2 coats of decking cleaner afterwards.

Concentration of the cleaning solution

There are decking cleaners that need to be diluted so as to work effectively. As well, we have decking cleaners that do not need to be diluted like the Ronseal DC Decking Cleaner. Depending on the scale of dirt you may settle for either kind. It is all a matter of personal preference. One thing to remember though is that the more concentrated a cleaning solution is, the more likely it is to be effective. Ready to use cleaners can just be applied to a garden sprayer and you're ready to go where as concentrates need measuring and mixing with water first but often offer better value for money.

Runner-up

Ronseal DC Decking Cleaner 5 Litre - Although you do not have to dilute the concentration, you will be able to get the best out of the solution but it best done when combined with a scrubbing brush. It deals with more than removing dirt but also removes moss, mould, mildew, fungus and algae.

Although you do not have to dilute the concentration, you will be able to get the best out of the solution but it best done when combined with a scrubbing brush. It deals with more than removing dirt but also removes moss, mould, mildew, fungus and algae.

The 5 litre container will let you cover an area of approximately 20-24 square meters. Those looking for value for money will have noticed that its much more expensive to treat per square meter than the concentrates, however, it does come ready to use and is perfect for anyone looking to clean there decking before applying your decking with a treatment of decking oil or protector. if you only have a small decking area to clean and no paths or fences etc, this could be the best option.

Pressure washer vs spray and leave

Choosing how you will apply the cleaner for effective cleanse matters. If you have the energy to do it, you can choose deck cleaners that need brushes or pressure washers to clean the deck. Pressure washers are more effective if there is a serious dirt/mould build-up. Alternatively, you can pick the “spray and walk away” deck cleaners which is probably what most people prefer for pure ease of use. All you have to do with these is spray them and let them work their magic.

Safety

Whichever brand of decking cleaner you select, make sure that its contents are both environmentally and domestically safe. Since we have children and pets running around it is better to get non-toxic deck cleaners. Most decking cleaners adhere to the use of safe chemicals but it is always good to confirm.

Make sure that the product is biodegradable to save the environment from harmful chemicals. Also, check to see the PH of the cleaning solution to ascertain that the chemicals won’t strip the surfaces leaving them dry and bare. That is why most deck cleaner labels state that no bleach, acid or caustic substances are present in the solution.

Multiple uses

There are decking cleaning liquids that can be used on other surfaces such as tarmac, cobblestones, granite, wooden sheds, boats, caravans and greenhouses among others. If you want a versatile cleaning liquid then products like the Jarder Spray & Leave Concentrate Cleaner are the ones to look for.

If you just want a simple decking cleaner with one function, you can try the Ronseal DC Decking Cleaner.

Also great

Jarder Spray & Leave 4 x 5 Litre Concentrate Cleaner - Patio Fencing Decking - Moss Mould & Algae Killer

This is another very popular spray and leave cleaner, it is effective against moss/mould growth. Five litres of concentration makes 30 litres after dilution and you will be able to cover a staggering 240m2 per every 5-litre container. With a strong formulation, this decking liquid will also be effective on other hard surfaces around your property so is a good multi use cleaner.

Simply apply with a sprayer or watering can and walk away. Like all the cleaners we have picked, its also safe around children and pets once dry.

User instructions

Most decking cleaners come with user instructions telling the user how to use the solution. Instructions including the ratio of dilution are important is the success rate of the solution after application. 

Select products that Cleary state what to do and what not to do with the product. Some products provide additional information like their products may harm aquatic life which is very important to consider if your treating areas near a water source such as a pond or stream.

FAQs

Are there any safety measures to adhere to?

Yes, there are a few general safety rules that you can follow. Because you are dealing with chemicals make sure that you wear protective clothing and gear, at the very least, gloves and eye protection. Working with gloves and protective gloves on will keep the solution from splashing on your skin especially if you have sensitive skin. Also check if the product is safe to use around ponds and keep children and pets clear of the area until it is dry.

Why bother using decking cleaner?

Decking cleaners take off moss and dirt without stripping your surface of its appearance. Manually brushing the dirty surface with basic soap and water takes time and may strip the deck of its beauty. The cleaning solution composition allows the surface to be ready for other treatments by removing elements that may prevent a successful application.

When is the best time for application?

Check to apply the solution when the surface is dry. It is advisable not to apply the solution hours before or after it rains. It is advisable to do the application when the sun is out but not glaring. If it is too hot, the solution will evaporate before completing the job. ideally you want to see a forecast of no rain for 24 hours to be on the safe side.


Top 5 Decking Cleaner Reviews


ULTIMA-PLUS XP Mould and Algae Remover - OUR BEST PICK
The strongest green mould & algae remover currently available

The ULTIMA-PLUS XP Mould & Algae Killer For Hard Surfaces is designed to clean different hard surfaces like large decked areas, driveways including tarmac, resin, block paved, sheds, boats, and even caravans among other surfaces, if the surface is hard, it will clean it.

Pros

  • Features high concentrations of moss/algae/mould killer to ward of re-growth and provide protections for several months.
  • See the results in as little a 2-3 days, simply apply with a sprayer and walk away.
  • The 5-litre container can be diluted to create 50-95 litres which can cover an area of 400m2.
  • The solution is suitable for all hard surfaces such as concrete paths, drives, fences, sheds and even caravans and boats if you're lucky enough to own one.
  • Safe for children and pets once the area has dried.
  • The product is biodegradable which means its 100% safe as it contains no bleach or caustic substances.
  • Offers excellent value for money as its sold as a concentrate.

The ULTIMA-PLUS XP Mould & Algae Killer For Hard Surfaces is designed to clean different hard surfaces like large decked areas, driveways including tarmac, resin, block paved, sheds, boats, and even caravans among other surfaces, if the surface is hard, it will clean it.

It contains a powerful moss and algae cleaner that prevents regrowth for up to very impressive 6 months before re-application is needed. For 5 litres you can cover an area of 400m2 once the solution is diluted but this will be nearer 200m2 when diluted at its strongest recommended rate. Depending on the concentration you need you can produce 50-95L from the 5 litres.

ULTIMA-PLUS XP XP Moss Killer Patio Cleaner & Green Mould and Algae Remover 5 litres, Blue

After you are done with the application, you can expect visible results in 2-3 days. Remember to only apply this solution when it is dry and no rain forecasted for 24 hours to be on the safe side. Applying this solution in wet conditions as the application will not be effective.

This product will take care of your deck as it contains no bleach, no acid and non-caustic substances. With a PH of 8, this biodegradable deck cleaner is one of the best deck cleaning solutions in the market. You can be sure that your children and pets are safe when coming in contact with the surfaces as the product is non-toxic.

One last tip, as with most cleaners you can use either a water can or garden sprayer, we would highly recommend using a garden sprayer as you can cover much more area as applying with a water can is fairly wasteful as it simply runs off the decking but with a sprayer it sits on the decking and is usually more effective. We recently reviewed some of the best garden sprayer which we talk about here and you can pick them up much cheaper than you might think so its well worth investing in one.

Compare the best prices from available sellers below


Pro-Kleen Green Mould and Algae Remover Concentrate - Simply apply and walk away

The Pro-Kleen Cleaner Moss, algae & mould Killer that is supplied in a 5-litre container with a PH of 8, to give you can idea, water is usually rated at PH 7 so its slightly more acidic that water but only just. This decking cleaner offers you a convenient way to clean your hard surfaces without using a pressure washer or spending hours scrubbing away with a brush.

Pros

  • It is a 'spray and walk away' product that doesn’t need a pressure washer.
  • Offers quick results even when dealing with severe cases of moss, mould & algae.
  • For every 5 litre container, the solution can be diluted to produces 25 litres.
  • Functional in cleaning other hard surfaces like pavements and fences, roofs, artificial lawns and garden furniture.
  • Offers protection for 6 months before needing re-application.
  • The product is non-acidic, non-caustic and non-toxic making it safe for our much loved pets and children once the treated area is dry.

The Pro-Kleen Cleaner Moss, algae & mould Killer that is supplied in a 5-litre container with a PH of 8, to give you can idea, water is usually rated at PH 7 so its slightly more acidic that water but only just. This decking cleaner offers you a convenient way to clean your hard surfaces without using a pressure washer or spending hours scrubbing away with a brush. 

The idea is that you apply the concentrate and just walk way expecting results in a few days. For those without a pressure washer, this concentrate proves to be a quick fix and it offers great results on wood decking.

Appropriate for even the most severe cases of algae or moss infection, this cleaning solution can be sprayed across different surfaces including fences and outdoor furniture. You do not need to dilute this concentration much as it may not be effective. For every 5 litre container, you should get about 25 litres of decking solution which would cover a very large area, we were not sure how large but when you think that most backpack sprayers hold 20 litres max, you could sprat a very large area with backpack sprayer filled to the top.

Just like most other products that made it onto our list, it provides protection for up to 6 months, this cleaning solution is safe for pets and children once the concentration dried. Non-acidic, non-caustic and no bleach, this biodegradable decking cleaner will leave your deck in tip-top condition and is well worth trying, at the time we looked into this cleaner, it had over 2900 reviews which further confirm how good this product is.

Compare the best prices from available sellers below


Ronseal Read To Use Decking Cleaner - Ideal for use before applying a decking treatment of oil or protector

The Ronseal DC Decking Cleaner 5 Litre is the product you need when looking to revive timber or your surfaces are infected with moss and algae, it's designed more as a pretreatment before applying decking oil or protector which allows the soil to get into the timber better.

Pros

  • Ready to use, no mixing with water, simply pour into a sprayer or watering can and walk away 
  • Designed to protect and revive decking wood.
  • Appropriate for use before applying deck finishes like decking oil or staining.
  • It is a powerful concentration needing no dilution to work optimally.
  • Able to cover 20-24m2 per container.
  • The product is non-toxic and will not harm the grass and is safe around pets and children once dry.
  • Opens up wood pores to ensure that other floor finishes stick to the wood effectively.

The Ronseal DC Decking Cleaner 5 Litre is the product you need when looking to revive timber or your surfaces are infected with moss and algae, it's designed more as a pretreatment before applying decking oil or protector which allows the soil to get into the timber better.

This decking cleaner needs no dilution as you have to use the concentrate as it is which does mean there is no mixing to worry about, simply tip into a water can or ideally a sprayer to reduce waste and apply.

This decking cleaner works by opening up the wood and removing grime that would prevent decking finishes to be soaked up by the wood. If you were planning on staining or applying decking oil, this product will be an effective way of reviving the wood. Effective against stains, algae, moss, fungus, grease, and mildew, this decking cleaner is able to cover an area of 20-24m2 per every container so compared to other cleaners is does not offer as much value for money, remember our best pick will cover up to 400m2 and make up to 95 litres of spray.

If you have a large deck you may need several of these but but the fact that there is not mixing involved does make it a good alternative to the usually concentrates available. If you are cleaning your decking in preparation to apply decking oil, this is certainly worth considering.

Compare the best prices from available sellers below


Jarder Spray & Leave Concentrate Cleaner

The Jarder Spray & Leave Concentrate Cleaner is another spray and walk decking solution in the market. All you need is to dilute the concentrate, spray the mixture and walk way waiting for the results. For application purposes, the solution has to be diluted to make it effective without harming the surface. From every 5 litres you purchase, you should be able to make a minimum of 30 litres. That is able to cover an area of 240m2 easily so isn't bad but we have seen cleaners with better coverage.

Pros

  • Features a spray and walk-away formulation, therefore, needing no pressure washer or scrubbing.
  • Every 5 litres offers a minimum of 30 litres of cleaning solution that is able to cover a 240m2 area.
  • Can be used on multiple surfaces as do all the cleaning in this list.
  • Shows visible results in 2-3 days offering surface protection for up to 6 months.
  • The solution is 100% safe for human contact once it dries up.

The Jarder Spray & Leave Concentrate Cleaner is another spray and walk decking solution in the market. All you need is to dilute the concentrate, spray the mixture and walk way waiting for the results. For application purposes, the solution has to be diluted to make it effective without harming the surface. From every 5 litres you purchase, you should be able to make a minimum of 30 litres. That is able to cover an area of 240m2 easily so isn't bad but we have seen cleaners with better coverage.

Apart from using it on your deck, this cleaner can be used on other surfaces too including terracotta pots, driveways, greenhouses, and roofs among others. You will be able to make use of this solution for more than just cleaning your deck, therefore, making it a convenient purchase.

Once you have applied the solution you can expect to see visible results within 2-3 days which you will have noticed is becoming the norm for spray and walk away cleaners. The solution will offer protection from moss, algae and of course mould for up to 6 months. If you notice some regrowth, a new application may be required and as with all cleaners, it sometimes can take a couple of treatments to really get it looking like new.

Once you have applied the solution you can expect to see visible results within 2-3 days which you will have noticed is becoming the norm for spray and walk away cleaners. The solution will offer protection from moss, algae and of course mould for up to 6 months. If you notice some regrowth, a new application may be required and as with all cleaners, it sometimes can take a couple of treatments to really get it looking like new.

This product is not toxic to humans or pets, therefore, making it 100% safe which is one of the factors the decking cleaners had to have to make it onto our list. With a PH of 8, the non-caustic, non-acidic and no-bleach solution will not strip your surfaces of colour. Avoid using this product in aquatic settings as it is dangerous to aquatic life.

Compare the best prices from available sellers below


Dirtbusters Spray Today Gone Tomorrow Professional Cleaner

The Dirtbusters Spray Today Gone Tomorrow can be fetched at an affordable price and is described as a professional grade detergent disinfectant treatment. Featuring a strong formulation, this decking liquid is capable of getting rid of dirt, moss, algae and mould from your surfaces. Not limited to decks only, you can use this solution on your patio, shed, fences or uPVC structures to keep them in good condition.

Pros

  • The product is sprayed and left alone to work without the need of a pressure washer.
  • Has no harmful chemicals that may strip the surface or cause health damage to the user.
  • Possesses a strong chemical formulation to kill off moss/ algae/ mould.
  • The 5-litre container produces a minimum of 20 litres when diluted, allowing you to cover significantly large areas.
  • It is a commercial-grade product that is able to cover an area of 200m2 per container.
  • A great option for when on a budget. 

The Dirtbusters Spray Today Gone Tomorrow can be fetched at an affordable price and is described as a professional grade detergent disinfectant treatment. Featuring a strong formulation, this decking liquid is capable of getting rid of dirt, moss, algae and mould from your surfaces. Not limited to decks only, you can use this solution on your patio, shed, fences or uPVC structures to keep them in good condition.

This cleaning solution is to be sprayed and left alone to do its work, it's worth noting that it cannot be applied by water can. There is no need to get extra scrubbing equipment or add any other cleaning solution it does a great job on its own.

For every 5 litres of this solution, you should be able to acquire a minimum of 20 litres after dilution. This is enough to cover an area of 200m2 with the cleaning solution which is fairly good coverage overall.

Avoid using this product 24 hrs before or after the rain. The surface should be dry for the cleaning solution to work optimally. Once the solution is dry, it is safe for children/pets to come into contact with the cleaned surface which is obviously a concern for most people. As with all the product on our list, this product contains no bleach, acids, or caustic substances that may harm your surfaces.

Being that it is a commercial strength product, you can expect nothing but excellent results from this, its not as well known as some of the other cleaners on our list but its well worth a try and should not disappoint.

Compare the best prices from available sellers below


Our Final Conclusion

As you can see, picking out the best decking cleaner is not that complicated. There are many products in the market that can serve you even if you have a composite deck. If you want long lasting protection from moss/mould/algae regrowth, you may have to re-apply the solution every 6 months or so. Other than that, you can keep your deck in tip-top condition by applying a decking cleaner and without having to pay for professional services or put in to much effort which is always a bonus. 

So have you spotted the best deck cleaning solution yet? Let us know in the comments section below and feel free to share your own experience if you have used any of the products we mentioned to clean your decking. 


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