If your roof has dark streaks running down the shingles, patches of green or black growth, or a general discoloration across the surface, it is time to schedule Roof Washing. In the warm, humid North Georgia climate, a common blue green algae called Gloeocapsa magma spreads across asphalt shingles and causes the dark staining that homeowners often mistake for normal aging. Left untreated, this growth retains moisture and accelerates shingle deterioration, shortening your roof's lifespan significantly and reducing your home's resale value. Southern Elite Exteriors recommends scheduling Roof Washing every one to three years to keep your roof in peak condition.