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.
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.
The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.
Scrubbing or power washing the lichen will only do more damage.
You can do this easily with a 1 1 ratio of bleach and water.
Moss growing on a roof may or may not be considered attractive or quaint but there is no doubt that extensive moss on a roof can seriously damage the roof by growing under and raising or loosening.
Mold on roof jan 30 2018 when it comes to the structural.
Black algae stains may be mistaken for but are not extractive bleeding a product cosmetic defect.
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.
Bleach kills fungus on contact.
This unique advance in shingle technology gives long term fungus protection for the entire roof.
Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside.
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.
Another organism growing on your roof is moss which is a plant not a fungus or algae.
Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.
The 3m company has developed an additive for asphalt roofing shingles using copper granules.
How to get rid of algae on the roof.
Black algae stains may be mistaken for but are not extractive bleeding a product cosmetic defect.
Simply mix the bleach and water spread the mix over your roof with a mop and hose the roof off.
If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.
If the roof fungi haven t damaged the structural integrity of the roof you should be able to clean it yourself.
The most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores.
Mold stains can form on roof shingles that are in permanent shade.
When it rains a slight amount of zinc dissolves from the strips and coats the roof inhibiting algae and fungus growth.
They call it the algaeblock system.
Though often attributed to an accumulation of dirt defective shingles mold or mildew.
