Black Streaks On Roof Shingles

Over time this algae accumulates developing a black outer coating which causes stains on roof shingles.

Black streaks on roof 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. Have you noticed black streaks on roof materials or patches along your rooftop especially in the shade. Black streaks on the north and west facing and shaded areas of your asphalt shingled roof can really wreck the appearance of your home. The most common type is known as gloeocapsa magma also known as blue green algae.

This algae growth usually begins as small spots and then eventually becomes visible streaks. While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely. Here s why algae grows on roofs. Roof shingles often fade into lighter colors over time but sometimes the opposite effect can occur thanks to subtle plant growth.

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. Algae growth on asphalt shingles. While not immediately damaging they can prematurely age shingles.

Technically the black streaks on roofs are a form of algae known as gloeocapsa magma. As the blue green algae. Algae arrive on the rooftop through the air in the form of spores or clumps of cells. The streaks look like mold but they re actually algae colonies that form in your shingles and feed on moisture and the limestone filler agents in the shingles.

Why are there dark streaks on my roof. But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof. The black streaks are also known as black algae or roof mold. Black streaks on shingled roofs are a common though mysterious sight.

The black streaks running down roofs are actually a hardy algae called gloeocapsa magma. They re actually algae otherwise known as gloeoapsa magma and they are as nasty as they are resilient. The black roof stains are caused by a form of algae that has been around for years typically found in the woods on the north side of trees or on exposed rocks. The streaks are caused by a type of algae known as gloeocapsa magma.

If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. Black streaking on roofs is a common problem. If you re seeing black streaks running along your roof chances are you ve mistaken them for dirt or even mold. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.