Use the sprayer to saturate a strip 3 feet high x 10 feet wide.
How to clean black off roof shingles.
Some of this growth including the stains from algae spores.
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.
One day you may notice that your roof is turning black or fungus is spreading across of it.
I am really disappointed the treated shingles didn t work.
So it pays to clean your shingles as soon as you spot algae growth.
Read on to find out how to remove them.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
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.
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.
Start at the lower portion of the roof moving up as you clean each lower section.
Note that our roof cleaning tips only apply for asphalt shingles.
Spray the cleaner on a section of roof and let it sit for about 15 minutes.
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.
If you have another type of roof it s important to check with your manufacturer to find out how to clean your roof.
You can choose to clean only the black areas of the shingles but this may leave an uneven color to the roof.
Clean your roof on a cloudy day to prevent the cleaning solution from drying too quickly.
How to clean roof shingles.
Cleaning roofs is slippery work.
But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores.
Discard any excess oxygen bleach solution after it has set for six hours.
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.
Cleaning the entire roof is recommended for an even appearance.
The black roof stains are caused by a form of algae that has been around for years typically found in the woods on.
Do it yourself and save big bucks.
Unlike black algae stains which come off immediately with the rinse phase of the cleaning dead lichen and moss will require a few heavy rains to finish rinsing off the roof.