06/16/2026
Those black streaks on your roof aren't just dirt. They're a living algae called Gloeocapsa magma that feeds on your shingles and shortens their lifespan. If you're seeing them on your Northeast Ohio home, call JD Roofing at 1-866-504-ROOF for a free inspection!
The black streaks on your roof are more than an eyesore—they are often caused by algae. Experts explain what causes them, why power washing can make things worse, and the safest ways to clean your roof.