Why you shouldn’t use a pressure washer on your deck

After a long winter, the decking may be dirty, gray, and sometimes affected by algae or mold. Many people then bring out the pressure washer, believing it is the fastest way to get the patio clean. In fact, pressure washing often does more harm than good to wooden decking. Using a pressure washer on the patio can, among other things, increase the risk of splinters in your feet and make it unpleasant to walk barefoot on the surface throughout the summer. 

How does pressure washing damage the wood?

When a pressure washer is used on the patio, water is forced against the wood’s surface at very high pressure. Wood is a living material with fibers that are easily affected by strong pressure, which can cause several problems:

- The wood fibers rise, making the surface rough and uneven.

- Splinters and slivers form, which can be uncomfortable—especially when walking barefoot.

- The surface layer is worn away, causing the decking to deteriorate more quickly due to weather and wind.

The result is often a patio that feels rough and becomes more susceptible to dirt, moisture, and future growth.

Why does the risk of splinters increase?

When the wood fibers are damaged by the high water pressure, small slivers and splinters can come loose from the boards. This makes the patio less comfortable to walk on and increases the risk of getting splinters in your feet. 

A patio should be a place where you can walk barefoot without any problems, especially on warm summer days. That is why it is important to clean the decking in a way that preserves the wood’s structure instead of tearing it up.

Why isn’t high pressure needed to remove algae and dirt?

If the decking is affected by algae, dirt, or dark deposits, it may seem as though strong water pressure is needed. In most cases, however, ordinary cleaning is more than sufficient. Dirt and growth usually sit on the surface of the wood and can easily be removed by scrubbing the surface thoroughly.

How to clean the patio gently

Instead of pressure washing, the following method is recommended:

1. Mix soap and water in a bucket.

2. Use a coarse scrubbing brush or a scrub brush.

3. Scrub the decking in the direction of the wood grain.

4. Rinse with plain water.

This method cleans effectively while allowing the wood to retain its natural surface. In addition, the soap helps replenish the wood’s oils, helping the patio stay beautiful for longer.

Why does the patio last longer without pressure washing?

By avoiding pressure washing and instead cleaning the patio with soap, water, and a brush, you protect the wood fibers and extend the life of the decking. The method is simple, effective, and gentle—which is exactly what the wood needs after a winter outdoors!

With the right cleaning method, the patio quickly becomes a pleasant place, ready for coffee breaks, barbecue evenings, and lazy summer days.

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Questions and answers

1. Why should you avoid pressure washing wooden decking?
Pressure washing can damage the wood fibers by forcing them up and making the surface rough. This can lead to splinters, slivers, and decking that deteriorates more quickly due to weather and wind.

2. Can pressure washing cause splinters in the patio?
Yes, the high water pressure can damage the wood’s surface, causing small fibers and slivers to come loose. The result is an uneven surface that can make it uncomfortable to walk barefoot on the patio.

3. How do I clean decking gently?
Mix soap and water in a bucket, scrub the decking with a coarse scrubbing brush or scrub brush in the direction of the wood grain, and then rinse with plain water. The method removes dirt and growth while allowing the wood to retain its natural surface.

4. Why is soap good for cleaning wooden decking?
Soap cleans effectively while helping replenish the wood’s oils. By cleaning gently with soap instead of pressure washing, the wood fibers are protected and the decking stays beautiful for longer.