Your stains are probably caused by the airborne spores of a blue green algae known as gloeocapsa magma which is often mistaken for mold or mildew.
How do i remove black streaks on my roof.
The important thing to know is that while an occasional cleaning shouldn t harm your roof doing it yourself may void any roof warranties or homeowner insurance policies you may have.
So the algae colony gets right back to work.
How to prevent black streaks roof mold if you ve already removed the algae from your roof once and you want to make sure you don t get it again or if you re building a new house and you want to make sure that your roof doesn t get those black streaks from algae there are 2 things you can do to prevent the algae from forming.
Algae can be killed and the stains removed using chemical cleaners though they usually return over time.
If the streaks don t bother you or you re not ready to invest in a new roof install zinc or copper strips available at roofing centers along the top course of shingles.
No pressure washers please.
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.
This is something you should absolutely not do.
Fill a large bucket with 1 gallon of hot water 1 qt.
Wet down the roof with water from the garden hose.
In order to remove the black streaking from your roof you will need several items.
While doing little harm to your shingles the black streaks caused by the algae are unsightly.
Bleach and chlorine are way to dangerous.
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.
It is important that the roof be wet when the cleaning mixture is applied or it may.
They re likely to damage the shingles just be sure to wet your foundation plantings first and rinse everything in clean water when you re done.
The streaks are mold forming on the roof the safest way to remove is with an roof cleaner that is safe to use and will not harm plants or animals.
Bleach may kill the top layer of algae and lighten the stains but it doesn t kill the underlying algae.
A spray stain remover solution a scrub brush a garden house protective eyewear rubber gloves shoes with tread a bucket and a ladder.
The wrong way to remove black streaks from your roof there is a temptation among homeowners to try to address gloeocapsa magna with power washing.
Roof algae can be easily removed by a simple roof cleaning.
How to remove black stains from roof shingles.
Of chlorine bleach and a quarter cup of.
How do you get rid of black streaks on your roof.