2 years after an expensive roof shampoo to remove black algae stains from an asphalt roof, the stains are back and now black mold or algae is also covering a retaining wall and patio. Find out how to control Black Algae with annual Roof Armor applications.
dark black roof streaks
Roof Shingle Streaks are a form of Algae that grows on the roof. Previously isolated to the US SouthEast, the stains are spreading.. Fast.