Gloeocapsa magma is a particular type of cyanobacteria and is responsible for creating black stains and streaks on roofs. This is a particular type of algae, which uses the limestone filler in your shingles as a food source, literally eating away at it.
Not only will this damage your shingles and break apart the granules, but it will shorten the lifespan of your roof.
Premier Power Wash uses the industry (ARMA) approved NON PRESSURE system that safely removes the algae and will add years to the life of your roof.