Read on to find out how to remove them.
How to clean black off roof shingles.
Cleaning the entire roof is recommended for an even appearance.
Using shingles that have been treated with algicide keeps the growth at bay for about 10 years thus the 10 year algae warranty.
So it pays to clean your shingles as soon as you spot algae growth.
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.
Spray the cleaner on a section of roof and let it sit for about 15 minutes.
Some of this growth including the stains from algae spores.
How to clean roof shingles.
In fact it s wise to consult your manufacturer for roof cleaning tips regardless of what type of shingles you have in order to avoid inadvertent damage.
Proper cleaning is an important step in roof maintenance.
Many home owners are surprised to discover that the once clean asphalt roof shingles have been slowly covered with a form of roof mold or mildew that appears as a light discoloration and spreads down the roof toward the gutters.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
Clean your roof on a cloudy day to prevent the cleaning solution from drying too quickly.
I am really disappointed the treated shingles didn t work.
Discard any excess oxygen bleach solution after it has set for six hours.
Use the sprayer to saturate a strip 3 feet high x 10 feet wide.
Start at the lower portion of the roof moving up as you clean each lower section.
You can choose to clean only the black areas of the shingles but this may leave an uneven color to the roof.
That way you always stand on dry surface and reduce the chance of slipping.
Note that our roof cleaning tips only apply for asphalt shingles.
Cleaning roofs is slippery work.
Tim asks how can i clean the black stains off my roof and keep them from coming back your stains are probably caused by the airborne spores of a blue green algae.
Do it yourself and save big bucks.
But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores.
If you have another type of roof it s important to check with your manufacturer to find out how to clean your roof.
It could take awhile but rest assured that lichen and most moss situations once dead will eventually dislodge and rinse off the roof thanks to mother nature.