Thanks guys, I have a friend who is doing an apartment complex and was concerned, but we are not expecting rain this week. I don't do a lot of roofs, so I would rather ask the experts
No gutters?
The SH quickly looses potency in it's battle with the roof algae, and from evaporation. I have had roofs sit for a week, and then get a 1/2 assed rain harm plants. This is because basically salt is left behind, once the evaporation takes place, and the salt can and will sometimes hurt the plants.Just curious.......For the roof cleaners that do not rinse, How much time does it take before SH loses it's potency. How much time should pass before it rains when you would no longer worry about killing plants from the run off?