What Causes Black Streaks On Your Roof

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.

What causes black streaks on your roof.

The black streaks are also known as black algae or roof mold. 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. 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.

Over time this algae accumulates developing a black outer coating which causes stains on roof shingles. While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely. Those that tend to be the most humid furthermore they will only appear on the north side of the roof. Algae growth on asphalt shingles.

Algae may be mistaken for soot dirt or tree droppings most of which typically produce only localized discoloration. Here s what they are and what to do about them. They re actually algae otherwise known as gloeoapsa magma and they are as nasty as they are resilient. 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. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma. Black streaks on shingled roofs are a common though mysterious sight.

The most common type is known as gloeocapsa magma also known as blue green algae. Why are there dark streaks on my roof. While the dark streaks are unsightly experts tell our team that the greatest danger to the roof is from moisture retention or root damage that algae and other life forms can cause. If you re seeing black streaks running along your roof chances are you ve mistaken them for dirt or even mold.