What Causes Black Streaks On Your Roof

They re actually algae otherwise known as gloeoapsa magma and they are as nasty as they are resilient.

What causes black streaks on your roof.

Over time this algae accumulates developing a black outer coating which causes stains on roof shingles. If you re seeing black streaks running along your roof chances are you ve mistaken them for dirt or even mold. Why are there dark streaks on my roof. Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.

Believe it or not those black streaks only appear on roofs in certain areas of the country. Algae may be mistaken for soot dirt or tree droppings most of which typically produce only localized discoloration. The black streaks are also known as black algae or roof mold. The streaks are caused by a type of algae known as gloeocapsa magma.

Here s what they are and what to do about them. Algae growth may cause discoloration on roofs resulting in brown or black streaks on a rooftop. Those that tend to be the most humid furthermore they will only appear on the north side of the roof. While not immediately damaging they can prematurely age shingles.

Black streaks on shingled roofs are a common though mysterious sight. Algae growth on asphalt shingles. Although these dark spots and ugly black streaks on your roof may look like dirt mildew soot or mold what they really are is algae. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma.

Also algae and fungus can grow together to form lichen the roots of which can wrap around and feed on the granules covering the shingles. Algae arrive on the rooftop through the air in the form of spores or clumps of cells. As the blue green algae. Black streaking on roofs is a common problem.