Brian C. Jackson is a roof cleaner that uses a safe non pressure application to rid your roof of the ugly black stains. This type of staining is called gloeocapsa magma and it is an algae that is feeding on the roof and shortening the life of the roof. The homes in Chelmsford, Massachusetts 01824, 01863 have this same problem with the algae and these roof will need to be cleaned or the roof will need to be replaced earlier than expected. A proper roof cleaning according to the ARMA (Asphalt Roofing Manufacturers Association) is having the roof cleaned with a non pressure method and not using a power washer or a pressure washer. The use of a high powered machine can and will damage the roof granules and this method is not recommended or approved and it may void the warranty on the roof. To get a free estimate on roof cleaning or any of the other exterior soft washing services we offer call Brian @ (603)401-8408 or visit the website @ www.jacksoncontracting.net