Pat Norman
New member
Largest roof I've cleaned yet. It was about 17,000 sq feet of roof we cleaned at a Comfort Inn Hotel. Took a little long because I cut the flow way back using a 4509 nozzle. I was very concerned about runoff even though you can see my tech still puts it down too heavy I have to stay on him about it. Even so the #9 nozzle worked out great and we only used two tanks or about 220 gallons of solution. It took about 5 hours to apply using the smaller orifice but I felt real good about very little runoff coming off a large part of the roof with no gutters.