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
Black Roof Algae on Retaining Wall Patio and Driveway?
Black Streaked Roof Shingles
Roof Shingle Streaks are a form of Algae that grows on the roof. Previously isolated to the US SouthEast, the stains are spreading.. Fast.