These are tough stains to completely remove as the algae is embedded deep in the shingle grit.
How to clean roof shingles stains.
After applying the cleaning agent allow it to work its magic for about 20 minutes.
Some of this growth including the stains from algae spores.
It s great that there s chemical cleaner that can be used to remove black algea from asphalt shingles.
If you decide to clean the roof yourself never ever use a power washer even on its lowest setting.
Using shingles that have been treated with algicide keeps the growth at bay for about 10 years thus the 10 year algae warranty.
Cleaning the roof yourself.
Not to mention the danger of using a pressure washer on a pitched roof.
I recently noticed black algae stains on my asphalt roof so this would be a good guide to refer to cleaning it off.
One day you may notice that your roof is turning black or fungus is spreading across of it.
Clean your roof on a cloudy day to prevent the cleaning solution from drying too quickly.
But once the algicide wears off your roof hosts an all you can eat buffet for the neighborhood algae spores.
You can choose to clean only the black areas of the shingles but this may leave an uneven color to the roof.
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I had to get out the pressure washer to really clean the roof but needed to use caution to not damage it.
Do it yourself and save big bucks.
Generally you ll need to point the nozzle of the spraying device toward the shingle you wish to clean then depress the handle.
Apply the cleaning agent to the roof.
Proper cleaning is an important step in roof maintenance.
So it pays to clean your shingles as soon as you spot algae growth.
How to clean roof shingles.
After clambering out onto your roof spray the asphalt shingles you wish to clean.