Here s why algae grows on roofs.
Black streaks on my 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.
This blackish algae creeps it way across neighborhood roofs gradually turning your home s asphalt shingles an ugly dark brown or black.
Algae growth on asphalt shingles.
They re actually algae otherwise known as gloeoapsa magma and they are as nasty as they are resilient.
Black streaks on shingled roofs are a common though mysterious sight.
Most black streaks form on the northern slopes of roofs where it s darker and wetter ideal for algae growth.
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.
Here s what they are and what to do about them.
The most common type is known as gloeocapsa magma also known as blue green algae.
While the streaks do not cause a great deal of damage they can cause the shingle to age prematurely.
As the blue green algae.
I covered our asphalt shingle roof about five years ago with white 50 year guaranteed shingles that had algae prevention treatment but now the entire north side of our roof is black with algae i bought the shingles from lowe s in marianna florida.
Why are there dark streaks on my roof.
The algae feed off of the limestone within the roof shingles.
Algae growth may cause discoloration on roofs resulting in brown or black streaks on a rooftop.
While not immediately damaging they can prematurely age shingles.
But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof.
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.
Algae arrive on the rooftop through the air in the form of spores or clumps of cells.
The black streaks running down roofs are actually a hardy algae called gloeocapsa magma.
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.
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.
The black streaks are also known as black algae or roof mold.
Algae may be mistaken for soot dirt or tree droppings most of which typically produce only localized discoloration.
What are those ugly black streaks on my roof.
