Is it a Good Idea to Use A Power Washer on a Wood Deck?

This question confronts every homeowner with a beautiful deck they would like to maintain in perfect conditions. After obliterating the gunk, grime and debris from your driveway or pool area with your spiffy power washer, it is only natural to wonder if you can perform the same in-depth cleaning on other exterior elements of your home.

Decks can succumb to an accumulation of all kinds of dirt, scum and grime and it would seem the easier solution will be to apply pressurized water to the problem and be done with. But, is this actually the best way to deal with the problem? Here is what you need to know about washing your deck with a power washer.

Potential Damage Caused by Power Washing Your Deck

Unlike the concrete on your driveway, or even the vinyl siding on your home, decks are typically made of wood. Wood is not nearly as strong and resistant to water as concrete or vinyl. As a matter of fact, your pressure washer could make an area of small damage or wear far worse. The high pressurized water can split the wooden fibers apart and cause serious damage that will take costly repair work to correct.

It is not just wood that can be damaged by the high pressure of a power washer either. If your deck contains PVC elements, you will find that these can also become affected by the powerful stream of water

Many wooden decks are also made of composite materials, which are basically plasticized wood which can be sturdy building materials. Unfortunately, these are also highly susceptible to the high power of a pressure washer. Even worse, you will have to pay for your damage yourself as this is not a type of damage that is not covered by composite deck warranties

When Is Power Washing My Deck Okay?

On the other hand, there are some situations where a pressure washing for your home’s deck may be just fine. But, you will have to keep the points mentioned above in mind while handling this particularly damaging task.

Here are some important pointers to follow when power washing your wooden deck.

  1. Get the Right Pressure

You will want to use a lower pressure on your delicate decking materials. If you have a deck made of softer woods, like cedar or pine, you will want to use a lower pressure setting. Softer woods should never be impacted by pressures that exceed 600psi and 500 psi would be a better choice to be safe. You may go as high as 1200 psi on hardwood, but looking for the lowest effective psi setting is highly recommended.

  1. Use the Right Tip

The best option for preserving your wooden deck is a 45° spread tip. Some seasoned professionals recommend the rotating tip, but this should be used carefully.

  1. Test a Small Portion

If your deck is older or you just want to play it safe, the best way to begin will be by testing the pressure from your washer on a small portion of the deck that is somewhat inconspicuous. A stair will be a lot easier to replace then one of the actual deck boards in case of serious damage. Begin with a very low setting and work your way upwards pausing between strokes to examine the effects on the wood.

  1. Get to Work!

If you feel you have found a pressure that will not damage your wood, you can proceed with caution. Remember that different areas of the deck may be more susceptible to damage and work carefully.

  • Keep the nozzle 12”to 24” from the wooden deck surface you are cleaning.
  • Use a sweeping motion to gently lift the scum and debris. Keeping your arm straight as you do will ensure an even amount of pressure.
  • Work in the same direction as the grain of the wood.
DIY wood projects

Deck related Repair DIY projects

A Few Quick Ways To Jazz Up Your Deck This Year

If you are looking at your deck and wondering what you can do yourself to jazz up your outside space and make it a little more enjoyable for you and you family, here are 5 great DIY projects that any weekend warrior can tackle! Choose one or all of these options to really transform your space and expand your outdoor options.

A New Seal

Decking boards take a lot of punishment and often end up looking a little worse for the wear. Nothing makes a deck look older and like it’s going to fall apart than grey boards that look like they have been outside forever. This is actually a pretty simple fix and doesn’t even require that much money to fix. You need something to sand with, wood stain, a new weatherproof sealant, a few clear days, and a lot of patience.

Lightly sand off the old sealant and take the time to replace any nails that have become worn. Fill in any gaps and consider replacing boards that look a bit old. Then stain and let set before applying the sealant. Rinse off the deck at the end of the curing process and enjoy the fruits of your labor.

A Better Railing

Standard railings on decks are usually pretty ugly, not exactly supportive, and can sometimes end up making the deck look cheap or old. Sometimes they are built just to satisfy building code regulations, not to actually provide a useful space or to make your family safer. Thankfully railings are just attached to the sides usually, making it easy and quick to take them down and then replace them with something better.

A few quick options include curved railings, railings thick enough to actually put a drink or something else on, or railings that make up a pattern with the support and auxiliary beams. Make sure you measure your deck completely and attach everything securely. This is a great project to pair with a re-sealing as you can make sure both parts of the deck match completely.

New Stairs

Stairs are really where the bulk of the utility of a deck lies. Usually a deck will only have one pair of stairs and often they are very narrow, making them hard to get up and down. Newer decks are moving to have multiple sets of stairs, making them wider and shallower, and even putting in mini stair sets for lower decks to make getting on and off of them easier.

This is a project you need to draw out ahead of time and it wouldn’t hurt to consult a pro to make sure your design will be load bearing. Measure the area from the top of the deck to the bottom, figure out how many stairs you need at your preferred height, and then install supports at both sides and in the middle for each board. This weekend project will take a bit longer than you think, but can change the entire look of your deck very quickly.

A Second Lower Deck

A new trend has been to add in a lower deck, just a few inches or even a few feet below the first. This increases the area that you can use, is really nice when hosting a dinner party, and can create sheltered areas underneath for working in the garden or storing items.

Wood Deck improvement

These small decks generally seem to be around 10 feet or so, are generally a mirror to the bigger deck, and can be quickly put together with a bit of elbow grease.

No matter which project you choose, a bit of money, a long weekend, and some good weather can help you rehab your deck and make it one of your favorite places to hang out.