These roof invaders require a moisture rich environment usually supplied by dew and shade.
Remove black stains on roof.
So black stains on roofs can be removed just choose a quality roof cleaner product or your local roof cleaning professional and make your roof look better.
As the blue green algae accumulate they develop a dark hardened outer coating which results in the black stains you see.
How to remove black stains from roof shingles.
Fill a large bucket with 1 gallon of hot water 1 qt.
The oxygen bleach starts to go ahead and attack the roof algae and it does its best to kill it and take away the stains.
The black streaks running down roofs are actually a hardy algae called gloeocapsa magma.
A spray stain remover solution a scrub brush a garden house protective eyewear rubber gloves shoes with tread a bucket and a ladder.
Use a cleaner specially made for killing algae or by spraying a mixture of one part bleach to four parts water with tsp trisodium phosphate or.
The algae feed on the limestone in shingles.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
Algae stains can be removed by cleaning though they usually return.
Most formulas contain chlorine bleach and or trisodium phosphate tsp and water.
An internet search on how to clean black streaks on your roof will turn up several different homemade formulas as well as commercial brands for getting rid of roof algae.
The first stains usually appear on the north facing sides of a roof which receives less light and in.
Be sure to have a friend or family member with you to ensure that you are safe while your climb up and work on your roof.
How to remove and prevent black algae stains on asphalt shingle roofs algae resistant shingles.
Wet down the roof with water from the garden hose.
How to clean roof stains wash your shingles where the sun doesn t shine.
Here s how to clean the.
It is important that the roof be wet when the cleaning mixture is applied or it may.
Black streaks on the north and west facing and shaded.
Of chlorine bleach and a quarter cup of.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
What you do is put it into a pump sprayer spray it on the roof and you need to keep the roof wet with the solution for about 10 or 15 minutes.
Make your shingles last longer.
Take a scrub brush.
In order to remove the black streaking from your roof you will need several items.
Lightly scrub the shingles.
Do shingles on your north west or other shaded roofs have streaky moldy stains.