Greenville, SC and the Upstate · Mon - Sat, 8:00 AM - 6:00 PM
Those black streaks on a Greenville roof aren’t dirt, they’re gloeocapsa magma, an algae that feeds on the limestone filler in asphalt shingles and thrives in the Upstate’s humidity and shade. Pressure washing a roof is how shingles get damaged and granules get stripped; soft washing is the only method we use on a roof, low-pressure application of an algaecide solution that kills the growth without touching the shingle surface aggressively.
High pressure strips the protective granules off asphalt shingles, which shortens the roof's life and can void some manufacturer warranties. Soft washing is the industry-recommended method for a reason.
Because soft washing kills the algae at the root rather than just knocking it off the surface, most Greenville roofs stay clean for 2-4 years, depending on tree cover and shade.
Serving Greenville, SC and the Upstate. Call (864) 477-1558 or request a quote online. We respond within 2 business hours.