Dark Streaks On Roof

What are the black streaks on my roof.

Dark streaks on roof.

If you re seeing black streaks running along your roof chances are you ve mistaken them for dirt or even mold. 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. Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.

Dark streaks or roof discoloration caused by algae happens in varying degrees across the u s especially in areas exposed to warm humid conditions. As the algae grows gravity gradually pulls it down the roof creating the characteristic dark streaks. Black streaks on the north and west facing and shaded areas of your asphalt shingled roof can really wreck the appearance of your home. On light colored roofs these dark stains can.

The most common type is known as gloeocapsa magma also known as blue green algae. The most common culprit is actually a blue green algae known as gloeocapsa magma that is. Roof algae contain a dark pigment that serves as a protective coating that shields it from the sun s ultraviolet rays. The algae feed off of the limestone within the roof shingles.

Why the dark streaks. Though often attributed to an accumulation of dirt defective shingles mold or mildew. It is most widespread in the eastern united states and is commonly found on roofs with northern exposure. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.

Here s why algae grows on roofs. They re actually algae otherwise known as gloeoapsa magma and they are as nasty as they are resilient. The black streaks running down roofs are actually a hardy algae called gloeocapsa magma. The streaks are caused by a type of algae known as gloeocapsa magma.

The black roof stains are caused by a form of algae that has been around for. The black streaks are also known as black algae or roof mold. What are those ugly black streaks on my roof. As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see.

This is what gives it the unattractive blackish color. 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. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. Over time this algae accumulates developing a black outer coating which causes stains on roof shingles.