It s actually just a blue green algae spread by airborne spores.
Mold or fungis on roof.
Unlike algae and moss which in their proper settings are healthy natural flora mold is a more clear cut.
Most dirty roofs are covered in various molds algae fungus and lichen.
Mold damage on roofs 1.
Characterized by its black green hue algae growth can eat away at shingles and eventually lead to roof rot.
Allow the roof to dry thoroughly.
This can seep into the wood of shakes and shingles and lead to roof rot.
The more the moss spreads over your roof the more it will add to your moisture problem on your roof.
Easily recognizable because.
A dirty roof is actually full of more than just dirt.
It is easily spread and causes those colorful stains on so many roofs.
It needs heat moisture and nutrients to grow.
If your roof was simply covered in dust it would be very easy to clean but due to the presence of the algae mold and so forth cleaning a roof becomes much more involved.
Inspect the roof for any remaining fungus.
The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.
A second application of cleaner will not have its full effect on a damp surface.
Not only is it unsightly it is extremely hazardous to the health of you and your family.
You must let the roof dry before a second application of mix.
Known as black algae or roof mold gloeocapsa magma is usually blamed on dirt accumulation mold and mildew or defective shingles.