Those ugly black streaks you see on your shingle roof is hardened algae known as Gloeocapsa Magma. When blue-green algae build up on your roof, they become darker and develop a hard outer coating. This results in those unwanted black stains on your roof. These usually develop over a 2 to 3-month period before it is detected by most homeowners.
If this is not addressed, it will worsen by the year. Gloeocapsa Magma unchecked will result in the premature aging and granule loss of your shingles. This blue-green algae’s spores are in the air. They are typically carried by the wind to your roof. Because it is airborne, it can easily be spread from another roof in your neighborhood to yours
We recommend that you hire a professional to remove Gloeocapsa Magma from your roof. Doing it yourself could void your roof’s warranty and lead to you getting seriously injured.