Black streaks? That is algae. We kill it at the root without damaging shingles.
Those dark streaks on your roof are Gloeocapsa magma, a hardy roof algae that feeds on the limestone filler in asphalt shingles. The longer you leave it, the more it eats into shingle life. Pressure washing a roof voids most shingle warranties and shortens the roof's life by years.
Soft washing is the manufacturer-approved method. Riverview Property Maintenance applies a low-pressure solution that kills the algae at the root. Results are visible immediately and they last four to seven years.
Riverview Property Maintenance services all of Gwinnett County. Click your area below for local pricing and scheduling.
Get your free, no-obligation quote today. Most quotes returned within 1 business hour.