[We Wash Concrete]

Giving an estimate based on square footage of the glass really only works on store-front type glass. With this you take your height and length for each side and get your measurement which would only take a few minutes. Every hospital I've seen would be very labor intensive to measure the square footage of glass. I would bid this kind of job per pane. And by pane I mean each glass window surrounded by a frame. I would imagine this will be an outside only cleaning, so in my area you would be looking at 1.00 to 1.75 per pane no matter it's size. This price can jump much higher if there is any construction clean-up, scraping, or restoration to do. I price strip-washer and squeegee cleanings the same as water fed pole cleanings. The water fed pole may be the better route if these windows are between 3-5 storys but theres a learning curve with WFP if you've never use one before.