Did they wash the paint off...?Don't bother with anything less than 4 gpm. Pressure is not as important. You need to research and learn what chemicals are used for what kind of dirt or growth. Proper washing with proper equipment and chemicals is way more profitable than mowing grass. These pics show how not to do it.
I charge between $60 and $75 an hour. If you are using the extension wand, charge more, and you won't have to exercise for a week after. Charge extra for your chemicals. You can save a lot making your own. Some chemicals I use are borax, regular dish soap, bleach, degreaser, and Tri-sodium phosphate/TSP.Did they wash the paint off...?
Thanks for the suggestions everyone! I'll check them all out.
Do any of you to pressure washing for clients? If so, what's generally the average charge?
Trust me it won't. My brother started with a 3.5, and even using tried and true equipment, chemicals, and techniques, it isn't as fast as a 4gpm. Save your money until you can get something proper. And cheating by the hour using something that small will take you forever, and end up looking like that deck.