Your deck is a place to relax and unwind after a long day of work, or where you bring loved ones together to catch up and have some fun. But since it’s outdoors it also gets exposed to all sorts of wear and tear. Regular cleaning is absolutely necessary to maximise enjoyment of this space.
Of all the different ways you can go about cleaning, it’s hard to argue against the blend of efficiency and results deck pressure washing brings to your yard. The only problem is it can sometimes cause more harm than good, causing wood to splinter or leading to warping.
That’s why we put together this guide on how to pressure wash a deck without damaging it. It’s as simple as using the right cleaning chemicals with the optimal pressure settings.
So, set yourself up for success by learning how to clean decking with a pressure washer at Jennychem - where you’ll gain access to the Kranzle pressure washer lineup and a surface cleaner to pair with it!
Is Deck Pressure Washing a Good Way to Clean Decking?
Before we can get into how to clean decking with a pressure washer we need to set your expectations on whether or not deck pressure washing is viable. Not every type of decking can be pressure washed. The last thing you want is to cause more harm than good.
Certain materials are more susceptible to water and pressure damage than others. Softwood and treated lumber are usually not good candidates for this approach given their weaker fibres. However, most other types of wood can be pressure washed without worry.
Here are the pros and cons of deck pressure washing.
Benefits of Pressure Washing Decking
- Removes Tough Stains and Grime Quickly: Effortlessly blast away embedded dirt, mildew, and algae faster than you ever could scrubbing by hand. Decks in damp or shaded areas where organic growth thrives need regular pressure washing.
- Restores the Natural Appearance of Wood: UV exposure and dirt accumulation can leave wooden decking looking faded and worn over time, but pressure washing removes surface buildup to breathe fresh life into the material.
- Reduces the Need for Harsh Chemicals: A pressure washer does most of the heavy lifting with minimal need for aggressive cleaning agents; it’s a more environmentally friendly approach than bleach-based solutions.
- Prepares the Deck for Staining or Sealing: Pressure washing sets the stage for better seal or stain adhesion and a longer-lasting finish, helping you keep your deck beautiful and protected for years to come.
Potential Risks of Pressure Washing Your Deck
- Can Damage Softwood or Older Decks: Too much pressure can etch softwood (pine or cedar), leading to splintered or rough surfaces. Older decks with existing cracks or weakened wood are more vulnerable and may not be good candidates.
- May Strip Protective Coatings: Sealed or stained decks may lose their protective layer, leaving the wood exposed to moisture damage. You might have to follow up deck pressure washing with a fresh seal or stain.
- Risk of Water Penetration: Sometimes water can work its way deep into the wood and cause swelling, warping, or even rot over time - especially if the deck is not properly dried and resealed.
- Doesn’t Address Deep-Rooted Mould or Rot: Pressure washing does remove surface-level mildew, but mould or rot that deep in the wood fibres is a different story. Alternative treatments or deck replacement may be necessary in such cases.
If you’re ever unsure about whether your deck can safely be pressure washed, take some time to find out what material it is and do your research. When in doubt, just use as low a pressure setting as possible on a small, inconspicuous area of the deck and look for signs of damage.
On that note, let’s get into how to pressure wash a deck without damaging it!
How to Clean Decking With a Pressure Washer: Step-by-Step Guide
The best part about learning how to clean decking with a pressure washing is how much time and manual effort you’ll save, all while achieving better results than you ever could with manual methods.
The first step, though, is setting yourself up for success with the best commercial pressure washer UK homeowners have access to and a cleaning solution to bring out the best possible results. That’s where we come in.
Sourcing the Essentials for Deck Pressure Washing
You’ll obviously need a pressure washer, but there are a few moving pieces to consider. PSI is the most important for cleaning results and safety. More isn’t always better. 1,300-2,000 PSI is plenty for wood, but 2,500 PSI+ might make more sense for composite decks.
A heated pressure washer offers additional cleaning power but a cold water pressure washer tends to work fine for most decks. You’ll really only need heat for managing tougher oil, grease, and grime - which hopefully aren’t on your deck!
There are so many other factors to think about too - do you want a gas powered pressure washer or an electric corded style? Do you need wheels on your pressure washer or will a stationary unit be fine?
No matter your needs, Jennychem is your trusted source for a home or industrial pressure washer. We stock the best brands in the UK backed by world-class customer service, so you can rest assured you’re getting the perfect solution.
We also have the other essentials you need for deck pressure washing, like our Timber & Wood Brightener. It clears away stains, neutralises caustic cleaners, and revitalises wood for a clean, vibrant finish you’re proud to show off.
You might also want to gather some basic safety gear like glasses/goggles, gloves, and non-slip footwear. We recommend covering your legs when pressure washing to protect against skin contact as well.
A deck brush or broom can be helpful for really dirty decks that need a bit more manual agitation, but the right pressure washer and surface cleaner pressure washer should do most of the heavy lifting for you.
Getting Your Deck Ready for Pressure Washing
Before you even connect your pressure washer and fire it up, take a moment to clear the deck of any furniture, potted plants, grills, and other objects so you have unobstructed access to the entire footprint. Things that cannot be moved can be covered with plastic tarp tor protection.
Then, take some time to remove leaves, dirt, and debris using a broom or leaf blower. This will prevent you from blasting these contaminants into the decking material with your pressure washer.
This is a good time to look for any damage on the deck that should be addressed before cleaning as well, like loose boards, protruding nails, or weakened wood.
Choosing the Right Pressure Washer Settings for Your Deck
Now comes the fun part, learning how to clean decking with a pressure washer. Remember, the right pressure settings are key to effective yet safe cleaning. Here are some quick guidelines:
- For softwood decks (pine, cedar, redwood): Use 1,300-1,500 PSI and a 40-degree nozzle to prevent splintering.
- For hardwood decks (teak, ipe, mahogany): A slightly higher setting of 1,500-2,000 PSI is safe.
- For composite decks: Follow the manufacturer’s recommendations, typically 2,000-2,500 PSI.
The nozzle you use matters just as much as the PSI setting. A 40-degree fan tip distributes pressure evenly so you won’t have to stress about gouging or damaging the wood. Avoid using 0-degree or 15-degree nozzles as these are more aggressive.
Using a Deck Cleaning Solution
We’re still not quite ready to start pressure washing, though. You should work smarter, not harder, by pre-treating the decking with a cleaning surface.
Our patio and driveway cleaner collection has some viable options, but any deck-safe detergent will work. What you can’t use, though, is anything that contains bleach, as it’ll strip the wood oils.
Once you’ve chosen a deck cleaning solution coat the entire surface and let it sit for 5-10 minutes. This “dwell time” as it’s referred to gives the active ingredients ample time to interact with stains and lift them loose from the decking surface, so it’s easier to blast them away.
Just don’t let the cleaning agent dry on the deck as this can lead to problems of its own. If there are really soiled areas on your deck, you might want to take a moment to crub them with a brush before bringing the pressure washer into the mix.
Proper Pressure Washing Techniques to Avoid Damage
Actually pressure washing a deck is simple and straightforward. Use these techniques to maximise results while minimising the risk of damage:
- Maintain a consistent distance: Hold the pressure washer wand 30-45 cm from the deck surface. Any further and you might not get an effective clean; any closer and you could damage the material.
- Use smooth, overlapping strokes: Move the wand in long, even motions, working with the wood grain.
- Avoid direct pressure on joints: Spraying between boards at close range can force water into the wood, leading to warping or rot.
- Work in sections: Clean small areas at a time for thorough coverage without letting detergent dry on any areas of the deck.
- Rinse thoroughly: Go over the entire deck with clean water to remove any remaining cleaner or debris.
There you have it, how to clean decking with a pressure washer! But, there’s still a bit more left to do before you can call it a day…
Post-Wash Maintenance
Make sure you’re giving the deck plenty of time to dry before you use it, or before applying any treatments. 24-48 hours should be plenty - then, you can take a look at the deck and determine the next steps.
This might involve sanding the surface to smooth it out if wood fibres have raised at all. This is a good time to protect the wood with a high-quality deck sealer or stain, which will prevent moisture damage and UV fading.
At this point you’re good to bring back any furniture and plants and start enjoying your stunning deck to the fullest, be it a solo drink to wind down or a family and friend affair with food and games! Everything you do on a deck is better when it’s in good condition.
How Often Should You Pressure Wash Your Deck?
Deck pressure washing should be a regular part of your home maintenance routine, but how often you need to clean the deck depends on usage, weather conditions, and material type.
Most wooden decks can be cleaned just once or twice a year, but those in humid or shaded environments are more prone to algae and should be cleaned more frequently. Composite decking requires even less maintenance and this can be done every few years.
The eye test is your best bet. If the deck looks worse for the wear, take an afternoon to pressure wash it. It’s quick, easy, and effective. And now that you know how to clean decking with a pressure washer, you can feel confident getting started!
Final Words on How to Pressure Wash a Deck Without Damaging it
That does it for our guide on how to pressure wash a deck without damaging it. This is the fastest and easiest way to breathe fresh life into a dirty deck and restore it to its original lustre.
Just be sure to do your due diligence and use the right settings, nozzle, and technique for a deep clean without the risks of damage. The last thing you want is to cause more harm than good.
Our blog has additional resources on how to clean a patio with a pressure washer, how to remove algae from patio slabs, and creating your own homemade patio cleaner.
But whether you need a pressure washer, the best patio cleaner, the best driveway cleaner, or all of the above, remember that Jennychem has you covered. Avoid costly deck damage and get the right tools for the job today to bring out the full potential of your decking!
Your deck is a place to relax and unwind after a long day of work, or where you bring loved ones together to catch up and have some fun. But since it’s outdoors it also gets exposed to all sorts of wear and tear. Regular cleaning is absolutely necessary to maximise enjoyment of this space.
Of all the different ways you can go about cleaning, it’s hard to argue against the blend of efficiency and results deck pressure washing brings to your yard. The only problem is it can sometimes cause more harm than good, causing wood to splinter or leading to warping.
That’s why we put together this guide on how to pressure wash a deck without damaging it. It’s as simple as using the right cleaning chemicals with the optimal pressure settings.
So, set yourself up for success by learning how to clean decking with a pressure washer at Jennychem - where you’ll gain access to the Kranzle pressure washer lineup and a surface cleaner to pair with it!
Is Deck Pressure Washing a Good Way to Clean Decking?
Before we can get into how to clean decking with a pressure washer we need to set your expectations on whether or not deck pressure washing is viable. Not every type of decking can be pressure washed. The last thing you want is to cause more harm than good.
Certain materials are more susceptible to water and pressure damage than others. Softwood and treated lumber are usually not good candidates for this approach given their weaker fibres. However, most other types of wood can be pressure washed without worry.
Here are the pros and cons of deck pressure washing.
Benefits of Pressure Washing Decking
- Removes Tough Stains and Grime Quickly: Effortlessly blast away embedded dirt, mildew, and algae faster than you ever could scrubbing by hand. Decks in damp or shaded areas where organic growth thrives need regular pressure washing.
- Restores the Natural Appearance of Wood: UV exposure and dirt accumulation can leave wooden decking looking faded and worn over time, but pressure washing removes surface buildup to breathe fresh life into the material.
- Reduces the Need for Harsh Chemicals: A pressure washer does most of the heavy lifting with minimal need for aggressive cleaning agents; it’s a more environmentally friendly approach than bleach-based solutions.
- Prepares the Deck for Staining or Sealing: Pressure washing sets the stage for better seal or stain adhesion and a longer-lasting finish, helping you keep your deck beautiful and protected for years to come.
Potential Risks of Pressure Washing Your Deck
- Can Damage Softwood or Older Decks: Too much pressure can etch softwood (pine or cedar), leading to splintered or rough surfaces. Older decks with existing cracks or weakened wood are more vulnerable and may not be good candidates.
- May Strip Protective Coatings: Sealed or stained decks may lose their protective layer, leaving the wood exposed to moisture damage. You might have to follow up deck pressure washing with a fresh seal or stain.
- Risk of Water Penetration: Sometimes water can work its way deep into the wood and cause swelling, warping, or even rot over time - especially if the deck is not properly dried and resealed.
- Doesn’t Address Deep-Rooted Mould or Rot: Pressure washing does remove surface-level mildew, but mould or rot that deep in the wood fibres is a different story. Alternative treatments or deck replacement may be necessary in such cases.
If you’re ever unsure about whether your deck can safely be pressure washed, take some time to find out what material it is and do your research. When in doubt, just use as low a pressure setting as possible on a small, inconspicuous area of the deck and look for signs of damage.
On that note, let’s get into how to pressure wash a deck without damaging it!
How to Clean Decking With a Pressure Washer: Step-by-Step Guide
The best part about learning how to clean decking with a pressure washing is how much time and manual effort you’ll save, all while achieving better results than you ever could with manual methods.
The first step, though, is setting yourself up for success with the best commercial pressure washer UK homeowners have access to and a cleaning solution to bring out the best possible results. That’s where we come in.
Sourcing the Essentials for Deck Pressure Washing
You’ll obviously need a pressure washer, but there are a few moving pieces to consider. PSI is the most important for cleaning results and safety. More isn’t always better. 1,300-2,000 PSI is plenty for wood, but 2,500 PSI+ might make more sense for composite decks.
A heated pressure washer offers additional cleaning power but a cold water pressure washer tends to work fine for most decks. You’ll really only need heat for managing tougher oil, grease, and grime - which hopefully aren’t on your deck!
There are so many other factors to think about too - do you want a gas powered pressure washer or an electric corded style? Do you need wheels on your pressure washer or will a stationary unit be fine?
No matter your needs, Jennychem is your trusted source for a home or industrial pressure washer. We stock the best brands in the UK backed by world-class customer service, so you can rest assured you’re getting the perfect solution.
We also have the other essentials you need for deck pressure washing, like our Timber & Wood Brightener. It clears away stains, neutralises caustic cleaners, and revitalises wood for a clean, vibrant finish you’re proud to show off.
You might also want to gather some basic safety gear like glasses/goggles, gloves, and non-slip footwear. We recommend covering your legs when pressure washing to protect against skin contact as well.
A deck brush or broom can be helpful for really dirty decks that need a bit more manual agitation, but the right pressure washer and surface cleaner pressure washer should do most of the heavy lifting for you.
Getting Your Deck Ready for Pressure Washing
Before you even connect your pressure washer and fire it up, take a moment to clear the deck of any furniture, potted plants, grills, and other objects so you have unobstructed access to the entire footprint. Things that cannot be moved can be covered with plastic tarp tor protection.
Then, take some time to remove leaves, dirt, and debris using a broom or leaf blower. This will prevent you from blasting these contaminants into the decking material with your pressure washer.
This is a good time to look for any damage on the deck that should be addressed before cleaning as well, like loose boards, protruding nails, or weakened wood.
Choosing the Right Pressure Washer Settings for Your Deck
Now comes the fun part, learning how to clean decking with a pressure washer. Remember, the right pressure settings are key to effective yet safe cleaning. Here are some quick guidelines:
- For softwood decks (pine, cedar, redwood): Use 1,300-1,500 PSI and a 40-degree nozzle to prevent splintering.
- For hardwood decks (teak, ipe, mahogany): A slightly higher setting of 1,500-2,000 PSI is safe.
- For composite decks: Follow the manufacturer’s recommendations, typically 2,000-2,500 PSI.
The nozzle you use matters just as much as the PSI setting. A 40-degree fan tip distributes pressure evenly so you won’t have to stress about gouging or damaging the wood. Avoid using 0-degree or 15-degree nozzles as these are more aggressive.
Using a Deck Cleaning Solution
We’re still not quite ready to start pressure washing, though. You should work smarter, not harder, by pre-treating the decking with a cleaning surface.
Our patio and driveway cleaner collection has some viable options, but any deck-safe detergent will work. What you can’t use, though, is anything that contains bleach, as it’ll strip the wood oils.
Once you’ve chosen a deck cleaning solution coat the entire surface and let it sit for 5-10 minutes. This “dwell time” as it’s referred to gives the active ingredients ample time to interact with stains and lift them loose from the decking surface, so it’s easier to blast them away.
Just don’t let the cleaning agent dry on the deck as this can lead to problems of its own. If there are really soiled areas on your deck, you might want to take a moment to crub them with a brush before bringing the pressure washer into the mix.
Proper Pressure Washing Techniques to Avoid Damage
Actually pressure washing a deck is simple and straightforward. Use these techniques to maximise results while minimising the risk of damage:
- Maintain a consistent distance: Hold the pressure washer wand 30-45 cm from the deck surface. Any further and you might not get an effective clean; any closer and you could damage the material.
- Use smooth, overlapping strokes: Move the wand in long, even motions, working with the wood grain.
- Avoid direct pressure on joints: Spraying between boards at close range can force water into the wood, leading to warping or rot.
- Work in sections: Clean small areas at a time for thorough coverage without letting detergent dry on any areas of the deck.
- Rinse thoroughly: Go over the entire deck with clean water to remove any remaining cleaner or debris.
There you have it, how to clean decking with a pressure washer! But, there’s still a bit more left to do before you can call it a day…
Post-Wash Maintenance
Make sure you’re giving the deck plenty of time to dry before you use it, or before applying any treatments. 24-48 hours should be plenty - then, you can take a look at the deck and determine the next steps.
This might involve sanding the surface to smooth it out if wood fibres have raised at all. This is a good time to protect the wood with a high-quality deck sealer or stain, which will prevent moisture damage and UV fading.
At this point you’re good to bring back any furniture and plants and start enjoying your stunning deck to the fullest, be it a solo drink to wind down or a family and friend affair with food and games! Everything you do on a deck is better when it’s in good condition.
How Often Should You Pressure Wash Your Deck?
Deck pressure washing should be a regular part of your home maintenance routine, but how often you need to clean the deck depends on usage, weather conditions, and material type.
Most wooden decks can be cleaned just once or twice a year, but those in humid or shaded environments are more prone to algae and should be cleaned more frequently. Composite decking requires even less maintenance and this can be done every few years.
The eye test is your best bet. If the deck looks worse for the wear, take an afternoon to pressure wash it. It’s quick, easy, and effective. And now that you know how to clean decking with a pressure washer, you can feel confident getting started!
Final Words on How to Pressure Wash a Deck Without Damaging it
That does it for our guide on how to pressure wash a deck without damaging it. This is the fastest and easiest way to breathe fresh life into a dirty deck and restore it to its original lustre.
Just be sure to do your due diligence and use the right settings, nozzle, and technique for a deep clean without the risks of damage. The last thing you want is to cause more harm than good.
Our blog has additional resources on how to clean a patio with a pressure washer, how to remove algae from patio slabs, and creating your own homemade patio cleaner.
But whether you need a pressure washer, the best patio cleaner, the best driveway cleaner, or all of the above, remember that Jennychem has you covered. Avoid costly deck damage and get the right tools for the job today to bring out the full potential of your decking!