Mixing Ratios: Deck & Wood Wash

By no means should this be considered the standard, we are not experts on wood but this works.  Please leave suggestions in the comments if you have alternative methods and help out the community.

Before You Do Anything

Soak wood very well with fresh water.

The Ratio & Method

Starting with a down stream, downstream straight 12.5 and surfactant and let dwell for a while, keeping an eye on it to make sure the mix does not dry on wood.

With very light pressure (25 degree tip) and a sweeping motion, clean each board with at least 2 passes. Apply Oxalic Acid at the end to brighten the wood and bring back the natural PH levels.

Side Notes

For railings, we use a pump up sprayer, typically 1:1 ratio. It does not necessarily have to be that strong.

  • Warning (Wood cleaning is a tricky task to get down especially if you are trying to learn it all on your own. It will tend to “fur” the wood.  Some guys do not use SH at all, and only use wood stripper. We have not attempted that method yet.)

3 thoughts on “Mixing Ratios: Deck & Wood Wash

  1. Brett says:

    hey yall. i havnt attemped yet but i know how hard it is to find proper info.
    1.wet deck
    2.soak in a strong sodium per-carbonate(this is where some info could come in ive herd guys refer to this mix as hydrogen peroxcide. which ive done some looking some chem companies sell a 32% mix vs 3% off shelf at store) then wouldnt have to mix stuff at all just add another chem tank.
    3.that kills off most stuff enough to be able to use super super low pressures to remove this stuff.
    4.then come back with your oxalic brightner.
    !all the info ive found the woood comes out a beautifull darker natural look.
    im just giving you some info its taken some time to gather and cross reference.

    i realy appreciate what your doing john lange have watch hours upon hours of yalls content

  2. Emilio says:

    From my experience so far, every builder I have asked says never use bleach on wood, with pre soaking make sure it’s not water based varnish as it lifts in parts and not others, i made this mistake using SH and had uneven bleaching of the wood had to strip and bleach at a higher mix, oxalic sand and re varnish. Now days I use as little water as possible give quick cleans and repeat over several visits until clean “I offer them window cleaning, gutters and other services coupled with the wood cleaning over those visits” I have had good results with sodium precarbonate “I’m still learning the ratios” I then oxalic acid/deck cleaner,once wood is clean I offer to maintain with a mop or soft brush and water (truck/boat brush) reaplying sealer as per manufacture specs. Wood comes in many flavors from pine to hard wood and sealed to raw or treated… no one proccess for all, water extracts left over tannin when present but this will eventually wash away. Happy washing and I’ll update this as time goes by

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