I'm sure that full-time p-wash companies have that in their menu. I should include it in mine as well because hand-cleaned windows would really add shine to the work. It's sort of like hand-cleaning gutters.
I have almost completed my first year in power washing as a add on to my painting services. I had it as a add on. We hand washed them using soft bristle brushes and extension poles. It was simple and a great add on that was an extra $150. They were streak free after they dried and the home owner liked the idea of not climbing the ladders anymore. I have a few yearly contracts because of how this made their house stand out. I also had an add on of polymer wax that was applied to the vinyl homes as well for an extra fee.
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