Hello. New to forum, moderate experience blasting dirt and grime off concrete/asphalt, and very little experience cleaning fences (pressure washed my own shadow box fence last year...learned not to use high pressure, lots of pulping). I've been reading this forum every free minute I get as I would like to start cleaning driveways/sidewalks, fences and houses for side gig. (Btw, it took me several days of reading various posts to figure out what SH was... sodium hypochlorite)
Therefore, I experimented with "softwashing" on a stretch of my fence I didn't clean last year. Couple things I noted from test, then I'll share some photos.
- All chem applications still required pressure to strip grime and mold off fence.
- Pressure washing shadow box fence still sucks.
I tried the following mixes and will attempt to label photos as such for comparison. All dwell times were min 15 minutes.
- Clorox pro outdoor mix, Sodium hypo, Sodium hydroxide (unknown concentration, apparently it's a trade secret) cut at 1:3 (2.25 cup to 1/2 gal water) then manual pump spray.
- 10% SH cut same as above, (2.25 cup to 1/2 gal water) pump spray.
- 10% SH cut at 1 cup to 1 gal.
The first two mixes didn't do anything when rinsed off with soaping tip and approx 1300-1500 psi (just guess since I don't have gauge, getting one tho). Had to use same pressure and a 40 deg tip at a pretty slow pace amd approx 4 inch standoff. The third mix was noticeably stronger since I could smell it. It seemed to make it easier to knock off the mold and dirt but still required same pressure, tip and pace to strip it all off. I then only applied mixture #3, let dwell, then washed off with soaping nozzle to show difference. I also didn't apply any chem to a panel and used same pressure, 40 deg tip and pace and results were almost, if not identical to chem application wash, without any greying tho and this looks best to me!
Am I doing something wrong with wash or is it still necessary to use this amount of pressure and pace? I did still notice some pulping on all but the soaping nozzle rinse. I'd like to figure out this soft wash deal or I'll just have to price myself out of washing fences to make it worth my time and effort.
Looking forward to the advice. Loving this forum...
before I started.
Chlorox Pro outdoor, mix 1:3 (2.25 cup : 1/2 gal) using pressure (unknown but too much)
Pool SH 10% mix 1:3 (2.25 cup : 1/2 gal) using pressure (unknown but too much)
Pool SH 10% mix 1 cup to 1 gal, using pressure (unknown but too much)
Pool SH 10% mix 1 cup to 1 gal with no pressure, just rinse
Just water, no chem mix, using pressure (unknown but too much)