Commercial power washing job

Hey guys, new to power washing, I have a job that wants their patios cleaned, I wasn’t sure how to price it or how you guys price concrete? I tried posting pictures but for some reason it wont let me. Any tips would help!

15 cents per sf

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do you measure the dimesnion of the building or house. for sq ft

With a $150.00 minimum.

Do you guys offer a schedule to
Them?? If so what do you find affective: monthly or quarterly?

Lots of questions to ask before getting to price. What is the size, what’s it stained with, where is the water, what is the access to it (nights weekends etc), what size machine are you using, hot or cold water, surface cleaner?

Cold water machine, the concrete looks textured but. Not sealed, it’s roughly 2000 square feet on the low end. Access is early mornings. 4200 psi 4gpm.

Length times width

Between $300.00 and $400.00, depending on your market. It will 2.0-2.5 hours with a wand based on the machine you have. 4200 at 4gpm is a fairly fast machine

Length times the height of the home

[quote="“greenearthwindows,post:9,topic:17780”]
Between $300.00 and $400.00, depending on your market. It will 2.0-2.5 hours with a wand based on the machine you have. 4200 at 4gpm is a fairly fast machine

[/QUOTE]

What psi should I push through my tip? I have one that brings it down to 1000 is thAt to light? What chemicals do you use for concrete?