It’s my neighbor’s roof (free), just a partial section but as you can see it needs cleaning. You guys helped with dialing in the soap and bleach percentages on my proportioner, man that surfactant really sticks!
I soaked the driveway in case overspray hit it, also diluted what little came out of the downspout. We’ll see here in a couple days how it turned out.
Alrighty I did a bucket test, with the valve set at ‘3’ it is drawing a 1:3 ratio, so that’s what…2-3% on the roof? It’s definitely not a 1:1 at wide open, maybe a 40/60 split. Guess I’ll have to open it full.
Make sure the amount of water through that ball valve is the same as when the sh valve is wide open too. A basic ball valve will allow more water in then the metered valves, there’s some restriction in those. I don’t open my water valve wide open, you won’t get right %. You need to run test with them wide open separate to see where your at. Soap shouldn’t be any issue, although I just put my soap in the sh……
You should see it clean up while you’re up there or if you were shooting from ground in no longer than 10min. Based on way it looks, you were probably pulling about 1%. That onw is pretty bad, would probably want to be around 4%
It should be inert in 24 hours, max. Don’t do the job if rain is forecast within 24 hours. I’ll drop thre link to the tubing we buy as well, but honestly, we quit using it, and we kill less plants (forces the guys to be more water-conscious, and we are having better results). We always bought the 6-mil, 6" worked on almost all downspouts we encountered, some of the fancier homes run a bit larger gutters/downspouts, so we got some 8" as well.
Someone very wise posted a saying “If it’s brown, it’s coming down. If it’s green or black, you’re coming back”
Once I hit the roof, I make sure all the algae is brown. As @racer said, usually about 10 to 15 minutes should be enough time.