What are these streaks on my roof?

We have heard people say that the black streaks on roofs are caused by everything from trees, birds, bad shingles, and jet airplanes flying over head. The fact is, in most cases, the stains and streaks are an airborne form of algae or fungus.

The black and green stains are commonly known as Gloeocapsa Magma, a type of algae that is a common problem among homeowners throughout the country.

Gloeocapsa Magma thrives in humid, warm climates, indiscriminately forming on the north side of roofs, siding, and walkways from coast to coast. This algae, mildew and fungus can greatly reduce the integrity of your roof over time, as well as drawing inordinate amounts of heat to the roof causing increased electricity bills. If not treated, the roof algae will reduce the life of your roof, diminish your home’s curb appeal and increase your home cooling expenses.



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