One problem concerns what a bleach solution will do to plants and grass, another issue involves neighbors who don't clean their side and won't let you do it. Picket style fences, unlike the privacy version pictured here, allow solution to blow into the neighbors yard, which might cause issues. I've never seen one of these chemical wash video's address the issue of damage caused by the solution, or how to address the opposite side of the fence. Mold left on the other side just keeps creeping back to your side, making this like playing whack-a-mole.
Generally, we don’t worry about the other side of the fence unless the homeowner of the fence specifically states they want it both sides cleaned. This cleaning mix was about 1 to 1.5%. Considering we watered before during, and after- it dilutes it way under one percent.(house hold bleach(not chlorine) is around 5-7% to give reference. I’ve never had any issues with it killing grass or discoloring it when watered properly. Behind this fence was an overgrown weeded asphalt driveway. Picket style fences do pose the concern for cleaner to drip down and leave streaks on the other side. Personally, I have not cleaned any wood picket fences but that would be a situation I would definitely discuss with the owner of the fence and maybe even the neighbor and let them know that that is a possibility. The neighbor may want their side to and could be willing to pay for it.
