I just recently have these guys to wash my house including roof before painting them. They've used special soap especially for washing houses and it didn't harm my flowers at all of which was my main concern. I was going to paint my house, but after they'd washed my house they sure saved me a lot of money, because my house looks very clean and our roof looks like new again. So, who needs painting! I hope this helps everyone and I strongly recommend Southern Ohio Mobile Power Wash for the job well done.