We just had our roof cleaned 2 years ago by a local pressure washing company. We watched our red tile coloring run all over our plants and down the driveway. In the end the roof looked ok, but the red stains on part of our driveway stayed for quite a while and 2 plants died.
This year the roof was black with mildew again! We called Mr Bergman. He cleaned it with his ""No Pressure"" system. He showed us from the roofing manufacturers themselves, that pressure washing was the wrong way to clean roofing! It is all on his website. Anyway, no red ran when he cleaned it, nor has any run off since he completed it in 12/2011 It also came out [ not ok ] but like new! As you can see, we are very happy customers!!!
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