How to Pressure Wash a Deck
To clean a Pinewood Deck
Get everything you need ready. You will need a pressure washer capable of between 600 psi and 1200 psi. A nozzle with a fan-spray-tip with a 40 to 60 degree output. You will need a detergent and may need to add some bleach. Allow several minutes for the detergent to work on the grime and the bleach to work on the mold and mildew but, never let the solution dry. You can buy a Deck and Fence Cleaner from Lowes or your local Hardware for around $15. The gallon I checked had an 11 gallon yield.
If you have grass or plants near your deck, cover them when using bleach or use a bleach type deck product.
You should never use bleach and water alone. When dried the bleach will leave small crystals behind. Those crystals act as little magnifying glasses and will deteriorate the surface. A detergent is surfactant, meaning it will break the surface tension of the water. This makes the beach easier to rinse off completely.
Remove deck furniture, plants and any other cleaning obstacles A really good idea would be to start in an out-of-the-way area, for when you mess up, so it won’t be as noticeable.
Here’s how to Pressure Wash a Deck
- Start by holding the nozzle approximately 24 inches above the wood surface. Come down to the preferred 16 inches away mark and start cleaning. Nice even strokes.
- Use around 600 psi to begin with and stay there unless you absolutely have to raise the psi to get the deck clean. The higher the pressure the more chance of damage.
- After you have cleaned the deck you may have some splintering of the wood, because water makes the wood grain rise. Sanding the deck afterward will ereduce the possiblities of splinters in feet and hands. Sanding also helps when staining is desired for even soaking-in and a nicer finish.
If you have last-minute questions about how to Pressure Wash a Deck, call the pros at Clean Stream 706.573.0089, and we’ll answer them for you..