The organisms use your roof shingles as food which slowly deteriorates the materials.
Green algae roof shingles.
Black or brown or green algae stains on asphalt roof shingles misnamed as mildew or fungus by some writers algae staining on asphalt shingles usually in shaded areas or on the more shaded roof slopes characterized by black staining fairly uniform over shingles but appearing specifically in areas of the roof shaded by nearby trees.
Algae spores can quickly spread in the right conditions.
Here in oregon mostly blue green algae grows on the outside of the house or on the roof shingles.
Getting rid of the problem is important but how do you safely remove algae and moss from roof shingles.
Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.
Lifetime limited warranty see gaf shingle and accessory ltd.
Step 4 take precautions.
Warranty for complete coverage and restrictions the word lifetime refers to the length of coverage provided by the gaf shingle and accessory ltd warranty and means as long as the original individual owner s of a single family detached.
Although mold can grow in your roofing materials if water gets trapped somewhere if you see any of the following on top of your roof algae are more likely your problem.
How to get rid of algae on the roof.
Step 3 check for cleanliness and rinse.
2stainguard algae protection is available only on shingles sold in packages bearing the stainguard logo.
Black streaks green or white spots round lichens mosses green moss that spreads across your roof.
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Never use a.
Put on rubber gloves and a breathing mask before proceeding you so you can.
The ugly black red green or brown stains on your roof are likely algae or moss.
It takes special care to clean algae roof stains and moss off the roof.
Allow the solution to soak into the shingles for at least 15 minutes.
See gaf shingle accessory limited warranty for complete coverage and restrictions.
The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.
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We ll explain more of that in a bit.
The only way to take care of it is to use a high base chemical solution like zinc sulfate.
Products with stainguard algae protection are covered by a 10 year limited warranty against blue green algae discoloration.
Cleaning step 2 make and apply the bleach solution.