Don't replace your roof, CLEAN IT! - renew your existing roof by having Master Stream professionally clean it. Chances are your roof is in good condition and only needs a good cleaning. Roof cleaning is a crucial part of a proper home maintenance routine. Not only will the roof look brand new but you can relax in knowing your shingles will live out their full life. The black stains you see on your roof is a bacteria called Gloeocapsa magma. This type of bacteria feeds on the limestone filler in shingles. If left untreated it will drastically decrease the life of your roof. Our preferred soft wash method will safely remove all stains from your roof providing 100 percent results. Our non pressure roof cleaning methods are approved by Asphalt Roofing Manufactures Association.