Brian C. Jackson is a roof cleaning specialist that cleans roofs that are covered with ugly black stains. We clean roofs all over Massachusetts, New Hampshire, and Southern Maine that have this same problem with black stains. This staining is an algae and it is called Gloeocapsa Magma and this stain is not cosmetic and it is feeding on the roof shingle and shortening the life of the roof. To clean roofs in the town of North Andover, Massachusetts 01845 it is important to use a safe non-pressure / soft wash method and this method is approved and recommended by the ARMA ( Asphalt Roofing Manufacturers Association). The use of a pressure washer or a power washer is not recommended or approved to clean a roof. A high powered machine can scare a roof and dislodge roof granules and even void the warranty on the roof.. For an estimate on a safe roof cleaning call Brian @ (603)401-8408 or visit www.jacksoncontracting.net to view all of the other soft washing services we provide.