Ok so im booked all week with roofs now that Im equipped for soft washing it should be much quicker. I did a shingle roof today and it came out nice and clean. I used a ground guy and I kept everything wet. I bagged the gutters when I applied the chemical. I then removed the bags after like 30-40 min. I rinsed the roof and put a bunch of water around the gutters and landscaping. Now Im praying nothing dies. ( seem like a lot of sh for the grass). My question is I have a barrel tile roof to do and it was no gutters. How do I keep from killing the grass with w/out being able to control the run off. Any help is greatly appreciated..