High pressure can damage your siding in various ways from disturbing oxidation to scarring your siding. Softwash is the preferred method of cleaning, this starts with the tip on your powerwasher wand, a tip with a large oraface will create backpressure to create a venturi. The mix you want to pull is 1part sodium hypochlorite, 2 part water, 4 oz surfactant. SH is the ONLY way to effectively eliminate algae... with high pressure, you are only removing the visible algae leaving the spores to return.SoftWash HouseWashing http://ift.tt/2BQY2tg via /r/DIY http://ift.tt/2nOkYag
