Those that tend to be the most humid furthermore they will only appear on the north side of the roof.
Removing dark streaks on roof.
As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see.
Technically the black streaks on roofs are a form of algae known as gloeocapsa magma.
Although these dark spots and ugly black streaks on your roof may look like dirt mildew soot or mold what they really are is algae.
Commonly found in climates with warm humid summers it does no damage to the roofing but it certainly does looks bad.
The black roof stains are caused by a form of algae that has been around for years typically found in the woods on the north side of trees or on exposed rocks.
Remove black stains from roof shingles to preserve the appearance of your home s roof.
If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.
Read on to find out how to remove them.
The most common type is known as gloeocapsa magma also known as blue green algae.
What are those ugly black streaks on my roof.
The black streaks running down roofs are actually a hardy algae called gloeocapsa magma.
The black mold like stains and streaks that appear on roofs particularly light colored asphalt shingles is actually a blue green algae gloeocapsa magma.
Black streaks on the north and west facing and shaded areas of your asphalt shingled roof can really wreck the appearance of your home.
In order to remove the black streaking from your roof you will need several items.
Chlorine bleach and trisodium phosphate step 1 wet down the roof with water from the garden hose.
Believe it or not those black streaks only appear on roofs in certain areas of the country.
It is important that the roof be wet when the cleaning.
The streaks look like mold but they re actually algae colonies that form in your shingles and feed on moisture and the limestone filler agents in the shingles.
These black streaks are unsightly and can diminish the appearance of the entire exterior of the home.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
The black streaks are also known as black algae or roof mold.
You will need to remove the existing algae by hand in order to eliminate the black streaking altogether.
Though often attributed to an accumulation of dirt defective shingles.
But now this black algae is termed a roof shingle algae because of the annoying discoloration on a asphalt shingle roof.
Tim asks how can i clean the black stains off my roof and keep them from coming back your stains are probably caused by the airborne spores of a blue green algae.
