Here s why algae grows on roofs.
Black mold on roof tiles.
The color of a mold isn t associated.
One such type is stachybotrys chartarum.
Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.
Black mold refers to several species of mold which is a type of fungus that have a dark green or black appearance.
In reality what you are seeing is not black mold but a bacteria that is called gloeocapsa magma.
Black mold on asphalt shingles is ugly.
You clean it and it returns year after year.
This will prevent the solution from draining in your direction.
Before you clean your.
Start on lowest row of shingles and work your way backwards to the upper part of the roof.
Continue spraying until you see runoff then let the chemicals sit for 15 20 minutes to soak in and begin attacking the mold.
If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.
Granted some of it could be mold but what is spreading like wildfire is gleocapsa magma.