Brian C. Jackson is a certified roof cleaning expert that specializes in cleaning the ugly black stains off of the roofs in New Hampshire, Massachusetts and Southern Maine. The staining on the roofs in Hollis, New Hampshire 03049 is cause by an algae and it is feeding on the roof shingles and will shorten the life of the roof. We use a safe non-pressure soft wash application to clean the roof of this algae called gloeocapsa magma and this process will not damage the roof in any way. The use of a pressure washer or power washer can and will damage the roof buy dislodging the roof granules and this high powered machine is not approved or recommended by the ARMA (Asphalt Roofing Manufacturers Association). To get a free estimate or read more information about roof cleaning or all of the other exterior soft washing services we offer just visit www.jacksoncontracting.net or call Brian @(603)401-8408.