Wood Cleaning Procedure

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Wood Cleaning Procedure

Heath Felps • May 16, 2021

Wood Cleaning Procedure

A basic wood cleaning procedure using sodium percarbonate and a follow up with oxalic acid.

Wood Cleaning Procedure

First thing is to make sure the wood is wet. Use a pressure washer to wet wood.

Use Sodium percarbonate. Mix should be 8 oz percarb, 1 gallon if h20, and 1 oz of soap. Elemonator or slo-mo. Get it really mixed up. If you have a heater, warm water helps dissolve. You can apply with a 12v, air, or gas pump system or just a pump up sprayer if you don’t have those. Don’t use a back back sprayer, that’s a bad move putting concentrated chemicals on your back.

Let it dwell for 2 to 20 min depending on severity and then rinse. If it starts to dry before you get to that section and mist it with water.

For the tip and wand setup you should use for cleaning wood, get the gpm of your pump and use a nozzle chart to get a nozzle that puts out 500-800 psi for your pump’s gpm. You should use a 1 tip nozzle. Don’t use a surface cleaner at all. It’s too close to the wood and causes damage. The circle motion goes against the grain of the wood and causes damage. Just don’t.

ALWAYS follow with Oxalic. That’s to brighten the wood and bring back down the ph level in the wood to keep it healthy. Which is very important also if sealing, staining or painting after it's cleaned. I use 8-12 oz per gallon. Let dwell for 5 min and rinse. Sometimes I leave it on, sometimes I wash it off. It all depends on the wood. Every deck is different.

Rinse along the wood boards in long sweeping motions. Don’t stop until you have hit an end and if you have to stop then sweep up and out at an angle to gradually get off the wood which will blend nicely and not cause a sharp mark. I like to use a trigger gun with a removable lance. Reason is because the lance is for the boards and pickets since they are lower and for the railings I prefer to do with just the gun and tip with the lance removed since it’s usually at my arm level. But you can use a lance if you work best with it instead of just the trigger gun. Whatever works best for you.

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