The streaks are caused by a type of algae known as gloeocapsa magma.
Black streaks on roof shingles.
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 black streaks running down roofs are actually a hardy algae called gloeocapsa magma.
The most common type is known as gloeocapsa magma also known as blue green algae.
The black streaks are also known as black algae or roof mold.
Over time this algae accumulates developing a black outer coating which causes stains on roof shingles.
If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.
Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.
Those black streaks on your shingles may look like problems with old age or damage but they are really caused by algae specifically gloeocaspa magma is usually to blame for those wavy dark shades that grow as the algae bloom spreads.
Algae arrive on the rooftop through the air in the form of spores or clumps of cells.
The most common culprit is actually a blue green algae known as gloeocapsa magmathat is spread by airborne spores.
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.
It can happen to homes that are otherwise maintained very well but why.
They re actually algae otherwise known as gloeoapsa magma and they are as nasty as they are resilient.
Black streaks on the north and west facing and shaded areas of your asphalt shingled roof can really wreck the appearance of your home.
If you re seeing black streaks running along your roof chances are you ve mistaken them for dirt or even mold.
Black streaking on roofs is a common problem.
Black streaks on shingles aren t caused by leaking tar.
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.
This isn t unique to abandoned houses either.
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.
But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof.
Rather they are caused by a hardy algae known as.
While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely.
The algae will worsen and become more noticeable each year trapping moisture and causing premature shingle aging and granule loss.
Almost without fail every photo of an abandoned house would have black streaks on roof shingles.
