Dark Streaks On Roof

This algae growth usually begins as small spots and then eventually becomes visible streaks.

Dark streaks on roof. As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see. May 1 2020 a to z contracting blog 2. The streaks are caused by a type of algae known as gloeocapsa magma. Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.

These black streaks are. The black streaks are also known as black algae or roof mold. While doing little harm to your shingles the black streaks caused by the algae are unsightly. The algae feed on the limestone in shingles.

Black streaking on roofs is a common problem. Solution should be a mixture of one gallon each of bleach and water 1 1. These streaks look absolutely horrible and for your home s curb appeal they could bring down the property value of your home and those in your neighborhood. 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.

It is not uncommon for roof shingles to turn black over time. You happen to walk back to your own home and see them too. Algae can be killed and the stains removed using chemical cleaners though they usually return over time. The most common type is known as gloeocapsa magma also known as blue green algae.

But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof. The algae will worsen and become more noticeable each year trapping moisture and causing premature shingle aging and granule loss. Over time this algae accumulates developing a black outer coating which causes stains on roof shingles. How to lighten dark streaks or algae discoloration on an asphalt roof prior to applying the solution all ground vegetation directly under the roof should be covered.

You re walking around your neighborhood and you see those weird marks on top of roofs usually darker in color and running down the shingles. 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. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. When that happens it is generally caused by mildew algae mold or dirt stains.

This solution should be sprayed on the roof and left. This blackish algae creeps it way across neighborhood roofs gradually turning your home s asphalt shingles an ugly dark brown or black. While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely. Although it may look like mold or fungi these unsightly black streaks or smear like stains may indicate a type of roof algae known in technical terms as gloeocaspa magma.

Here s why algae grows on roofs.