Black algae stains may be mistaken for but are not extractive bleeding a product cosmetic defect.
Fungus growing on asphalt roof shingle.
Some black stains on asphalt roof shingles are caused by a black algae sometimes misnamed as a black fungus or even a mildew such as that shown in the photograph here.
These stains will discolor your roof and damage the shingles over a period of time if left alone.
If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.
Mold stains can form on roof shingles that are in permanent shade.
Black algae stains may be mistaken for but are not extractive bleeding a product cosmetic defect.
This unique advance in shingle technology gives long term fungus protection for the entire roof.
If the roof fungi haven t damaged the structural integrity of the roof you should be able to clean it yourself.
You can do this easily with a 1 1 ratio of bleach and water.
The most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores.
How to get rid of algae on the roof.
Simply mix the bleach and water spread the mix over your roof with a mop and hose the roof off.
Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside.
Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.
Hose off and brush all moss loose from your roof shingles.
Moss aides in shortening the life span of your roof because it retains moisture and in cold climates can freeze causing damage to the shingle and granules.
Mold on roof jan 30 2018 when it comes to the structural.
Scrubbing or power washing the lichen will only do more damage.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye.
Another organism growing on your roof is moss which is a plant not a fungus or algae.
The 3m company has developed an additive for asphalt roofing shingles using copper granules.
You can find more information on these special roofing shingles here.
Not to worry though because you can clean the mold off with basic household bleach and save your roof long before you need an expensive replacement.
They call it the algaeblock system.
Bleach kills fungus on contact.
Though often attributed to an accumulation of dirt defective shingles mold or mildew.
Some black stains on asphalt roof shingles are caused by a black algae sometimes misnamed as a black fungus or even a mildew such as that shown in the photograph here.
