The Roof Cleaning Institute Of America Training & Certification Forum
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You can't undue the dead, but you sure can prevent it, and there is more than one way to do it. Rinsing the roof well that is before you kill the shrubs, now that they are dead... a little late. an ounce of prevention = a pound of cure.
Bottom line is Simon you need to read more and being a premium member will help, not give you a free pass to drive everyone nuts here or there, you really need to read.. search & read and read BEFORE you start spraying a customers property.

Rinsing the roof is not the whole answer if you do rinse there is more to it then just rinsing it. But making a commitment to being a premium member means more than just the $100 bks.. it is making that commitment that you are serious and spending the time to learn.
You have just created another negative ideal for which will spread not only for your company but for roof cleaning in general.

You killed off the shrubs and lost money to fix the damage and are ruining your reputation right out of the gate. Lesson learned that getting started it is not that easy, vendors can sell the equipment give you a few tips here & there, read a bit here and viola' your a roof cleaner. FYI this only one of the many mistakes being made that give us all a bad name Simon, now what will be your next mistake that causes you to go oops.. I didn't know about that.. think about that for a bit.

Kim R