Midwest68 said:
I had a client the other day who hired me to wash only the inside of the windows in his home because he planned to clean the outside with a borrowed pressure washer. He had hired a company to pressure wash them once and they still looked filthy. Having never used one on windows, can they truly get them as clean as the traditional approach with a squeegee and a bucket of soapy water? Just wondering.
Nothing...absolutely nothing will get them as clean as the tradditional way. However, pressure washing the windows (low pressure of course) and rinsing well with DI water can leave them cleaner than just leaving them alone....
The trick is knowing how to rinse. I know your thread is about which one is better...BUT...if one uses DI water for rinsing, then, in theory, the DI water will not leave spots. What will leave spots is the stuff that gets into the water during the rinse. For example; if you hit the frame above the window while rinsing, that will drag contamination back onto the glass which will spot. Or, if there is dust or pollen in the air, it will settle onto the wet glass and cause spots.
alot of guys PW a house and neglect the windows...that causes them to get dirtier..but if just a little of attention is given to the windows during the final rinse, the windows can come out rather nice.
I do both services so I try and upsale the window washing service. But when the client refuses, I still try and get good results on the windows.
Finally, if a realtor or property manager hires me for windows on a budget, i will power wash them using the method mentioned above...faster but cheaper and decent results.