How to Pressure Wash a Cedar Deck

Naturally rot-resistant cedar is often used for decks and other outdoor applications because of its durability. But like all woods, it eventually shows signs of weathering and decay if not properly cared for. Rain, dirt and the grease from your grill all leave their toll. Clean and seal your deck in the fall, after barbecue season is over, but before heavy snows arrive. Reseal the deck every two to four years, depending on use and your environment.

Trisodium phosphate
Bucket
Large sidewalk brush
Chlorine bleach
Sealant
Paint rollers

Instructions

- 1
  Mix 1/2 cup trisodium phosphate and 1 gallon hot water in a bucket. Dump the cleaning solution directly on the deck. Scrub the deck with a large sidewalk brush to remove grease and stains. Rinse with a garden hose.
- 2
  Mix 1 qt. chlorine bleach with 1 gallon hot water in the bucket and pour it on the deck. Spread the solution over the entire surface with the sidewalk brush. Wait 30 minutes and rinse. The bleach destroys mildew and brightens the color of the wood.
- 3
  Attach a garden hose to the pressure washer and hook up the pressure washer hose as well. Attach a 40-degree fan nozzle to the pressure washer hose. Set the pressure at 3,000 PSI. Turn on the water and start the machine.
- 4
  Pull the nozzle to force a stream of water onto the deck. Use long, steady continuous strokes and point the water at a low angle to the deck, rather than directly at the surface.
- 5
  Allow the deck to dry for 48 hours. Apply a water-repellent deck sealer with a paintbrush or paint rollers.

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