High pressure cleaning blasts away the grit on your shingles and can lead to water damage and expensive leaks. We have even seen some unlicensed contractors put a surface cleaning machine on roofs! There is no nonsense with IC Powerwashing’s roof cleaning; we apply special cleaning agents at low pressure, then wait for them to do their magic. Black streaks, mold, and debris are eliminated right away. The most stubborn moss and lichens will die and fall off with the next rain shower. It is that easy and completely safe for pets, people and the environment.