Black Stains On Roof Shingles

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

Black stains on roof shingles.

The black streaks running down roofs are actually a hardy algae called gloeocapsa magma. How to remove and prevent black algae stains on asphalt shingle roofs today s homeowner find out how to remove unsightly black stains from asphalt shingle roofs caused by an algae known as gloeocapsa magma that is spread by airborne spores. Black streaks on the north and west facing and shaded areas of your asphalt shingled roof can really wreck the appearance of your home. Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.

Here s why algae grows on roofs. 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. 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. But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof.

Dark black or brown roof shingle stains are often caused by black algae bleed through or extractive bleeding of asphalt dirt soot or organic debris. The remedies for and means of preventing stains on roof shingles are discussed as well. The black streaks are also known as black algae or roof mold. Remove black stains from roof shingles to preserve the appearance of your home s roof.

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. When that happens it is generally caused by mildew algae mold or dirt stains. While doing little harm to your shingles the black streaks caused by the algae are unsightly. But there are other roof stain colors and causes.

While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely. Your stains are probably caused by the airborne spores of a blue green algae known as gloeocapsa magma which is often mistaken for mold or mildew. The streaks are caused by a type of algae known as gloeocapsa magma. As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see.

This algae growth usually begins as small spots and then eventually becomes visible streaks. These black streaks are unsightly and can diminish the appearance of the entire exterior of the home. Today s homeowner serves cookies to analyze traffic and better serve you. It is not uncommon for roof shingles to turn black over time.

Algae can be killed and the stains removed using chemical cleaners though they usually return over time. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.