Those streaks on your roof consist of Gloeocapsa Magma, a type of algae that thrives in humid areas like the North East. Itu2019s become more of a problem in the last few decades because shingle-makers now use limestone filler in the manufacturing process, which is actually a food source for the algae. Roof stains are therefore an indication that your shingles are literally being eaten, quite possibly resulting in a shortened lifespan for your expensive roof. Not only that, but if allowed to go unchecked, the algae build-up can significantly diminish your roofu2019s reflective properties, resulting in more strain on your air conditioner and higher energy costs. Lastly, those black streaks are unsightly, and can dramatically tarnish the curb appeal of an otherwise beautiful home. After our treatment youu2019ll be amazed by how great your roof looks, and your neighbors will probably appreciate it, too! Roof cleaning is one of the quickest, most cost-effective ways to instantly sharpen the look of your home and neighborhood.