Tips for Cleaning Pressure Treated Wood Decks


Keep Up Your Deck Maintenance

For those of you who own a pressure treated wood deck, you should do the cleaning and maintenance on the surface at least once or twice every year, but it all depends, on the location of your house in relation to things like the sun, hills, trees etc and also the local climate such as the large variation when comparing Wellington to Auckland. Pressure treated wood decks are always prone to mold and can easily attract moss growth. You will also encounter organic material such as autumn leaves that can mark your wood deck surface. This will normally happen if you allow it to accumulate and sit for long time on the deck. In order to preserve your pressure treated wood deck you need to clean it on a regular basis. Below are some of the tips and tricks that you can use for cleaning the surface without damaging it.

To clean pressure treated wood decks, you need:

  • Natural-fiber Broom
  • Protective eyewear
  • Rubber gloves
  • Scrub brush
  • Garden hose
  • Wood and deck cleaner
  • Dustpan

Clean and Prepare

First thing that you need to do is to remove any furniture located on the wood deck, planters, grills as well as other existing items that you placed on the deck.
Then, you need to sweep the wood deck in order to remove sand, leaves or other debris that you can find.

Eyewear Protection

Always ensure you are wearing protective eyewear so you are not hit by flying debris when you start using the power washing tool during the cleaning process.

Power Wash Time

If you find that the surface is fairly clean, we do not recommend you use this method unless the surface has lots of mold and major stains.

But if it’s looking pretty nasty then the next step that you have to do is to attach your garden hose onto a power washer. Once done, turn on your water supply before turning on the power washer to proceed with your cleaning task.  Whenever you are using power washing tools on your wood deck, always use it with extreme caution in order to prevent damaging your wood surface.

Make sure that the end of your power-washer wand is at least 45 cms away from the surface of your wood deck.

Another Cleaning Method

If your surfaces are relatively clean then you can fill a bucket with water and add oxygen bleach like OxyClean into the water.
Make sure you read the manufacturer’s instruction and use the recommended amount of the solution on your wood deck’ surface.

If you want to use cleaning products on your pressure treated wood decks, you must make sure to determine the wood species, the preservative being used by the solution, its retention level and also other related options. You need to also apply a penetrating oil finish in order to lessen human and animal exposure whenever you use the preservatives used for treating your wood deck.

After that, you need to pour a bit of water along with the bleach solution on your pressure treated wood deck’s surface. Then gradually work it into the deck using circular motions and then scrub the deck wood using the scrub brush.
You need to repeat the above method until you finished cleaning the entire wood deck.

Finishing Up

Rinse the wood deck simply by using the garden hose, then allow the deck to dry completely for at least 24 hours.

Finally, you need to brush on a coat for sealing the deck in order to preserve the wood.  This helps you to prevent any stains being absorbed into the wood.  This method is especially important if you use a power washer tool on your pressure treated wood deck because it will definitely remove some of your existing deck sealer during the task.

Quick Tips to remember

  • Once you finished doing the power washing task and also scrubbing the wood deck, you might want to consider re-staining the wood deck.
  • The wood deck must be stained annually and performed after you have completely clean the area. By using wood sealing product which consists of tint, you are not only able to stain the wood deck but also protect it.
  • Always bear in mind that the preservatives used for cleaning pressure treated wood decks can be toxic and so be extra careful when using it.
  • Always wear a face mask and rubber gloves to protect your eyes, skin and hands from any chemicals that you use
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