Exterior House Cleaning Services.Our Services Have you noticed the incredible outbreak of roof stains in your neighborhood, your town, and even the entire Cape? Roof stains, and the damage to homes they bring with them, are infesting Cape Cod in epidemic proportions. Until recently, most of us thought all this ugliness was just an eyesore, and while not fun to look at, wasn't actually shortening the lifespan of our roofs -or raising our energy bills. This, however, is simply not the case. In fact, up to 80% of the homes and businesses today with shingled roofs will develop problems caused by algae, fungus, moss, etc. The reason for this is mainly that the composition of the most common shingles themselves has changed dramatically over the years. Materials now used to make asphalt shingles are the favorite food of algae, moss, mold and fungi. Cheap fillers like limestone, wood chips, and cardboard are being substituted for the high grade materials that should be used in many shingles today. Shingle manufacturers saved a buck - at our expense. So. . . what can you do about it? - Some Contractors will tell you that power-washing your roof with a chlorine based solution will do the trick, but in reality, this will do more harm then good. - Some Roofers will tell you that you need a new roof, and it can't be washed, but this is not true, either. - So, what can you really do to save your roof from being eaten away by moss and algae, and eventually needing to