What's eating away at your roof? Black streaks on your roof are gloeocapsa magma, commonly known as blue-green algae. Manufacturers of asphalt shingles add limestone to increase the weight of their products. However, this limestone is an excellent source of food for blue-green algae. To thrive, blue-green algae need a humid, shady environment . On Long Island, these streaks are most commonly found on north- and northwest-facing roofs, as well as heavily shaded properties. If not treated, these black streaks will continue to grow until they turn into moss. While black streaks on an asphalt shingle roof are unsightly, moss and Lichen can cause significant damage to your roof. You can have your roof cleaned properly today by contacting Clean Rite Exterior Cleaning 631-806-5006
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