Spray wash the roof with a 50 mix of water and bleach to get rid of the algae.
Removing fungus from roof shingles.
Never use a.
It can take several weeks to several months for the moss to pull away from the shingles.
Put on rubber gloves and a breathing mask before proceeding you so you can.
They re likely to damage the shingles just be sure to wet your foundation plantings first and rinse everything in clean water when you re done.
Using a plastic pump type garden sprayer thoroughly soak the affected area with your choice of chemical.
You could use regular household bleach to remove the algae from your roof.
Step 4 take precautions.
To remove the algae from asphalt shingles you have a few options.
Wash off all.
No pressure washers please.
Mold stains can form on roof shingles that are in permanent shade.
How to use bleach mixtures on your roof.
Gradually it will loosen from the roof shingles.
Cleaning step 2 make and apply the bleach solution.
Bleach mixtures can injure sensitive plants.
Because it is difficult to totally protect them from the mix spray.
Step 3 check for cleanliness and rinse.
Allow the solution to soak into the shingles for at least 15 minutes.
These stains will discolor your roof and damage the shingles over a period of time if left alone.