Hook up your pressure washer up to a hose connected to the spigot on the side of your house.
Put on protective eyewear.
Turn on the power to the pressure washer. If you have an electric pressure washer, you will need to run an extension cord from an outlet to your pressure washer.
Adjust the pressure washer to the lowest setting, usually about 1,500 PSI.
Aim the trigger wand toward the highest part of the plank and begin to spray the area.
Spray the planks in a downward motion.
Continue to spray until you have cleaned all of the planks.
Things You Will Need
- Pressure washer
- Depending on the level of cleaning required, you may be able to use a hose with a high-powered spray nozzle instead of a pressure washer.