It is best to use a Soft Washing technique to clean the black streaks and moss off of a roof. The detergents we use when softwashing will kill the mold at it's root leaving your shingles with a new fresh look. Never use High Pressure to clean a roof because it could damage the integrity and lifespan of the shingles. Soft Washing is the key and is the most effective way to wash your shingles safely!
This information was brought to us by our friends over at drpowerwashcharlottesville.com