Roof Pressure Washing in Alpharetta, GA

Professional Roof Cleaning in Alpharetta, GA

Those black streaks running down your Alpharetta roof aren't dirt — they're Gloeocapsa Magma, a type of algae that feeds on the limestone filler in asphalt shingles. Left untreated it spreads across the entire roof surface, retains heat that accelerates shingle deterioration, and makes a home look poorly maintained from the street. Properties in Windward and Crabapple with heavy hardwood canopy providing shade and moisture are particularly vulnerable.

Roof cleaning requires soft washing exclusively. Roof shingle manufacturers explicitly warn against pressure washing shingles because high-pressure water strips the protective granule coating that extends shingle life. Soft washing uses low pressure under 500 PSI combined with appropriate cleaning solutions that kill the algae at the root and rinse cleanly off the surface. Results are dramatic — a dark stained roof comes back to its original color in a single treatment.

Roof cleaning also extends shingle life by stopping the active biological deterioration. An untreated algae infestation shortens shingle lifespan by years. One professional soft wash is one of the most cost-effective maintenance decisions an Alpharetta homeowner can make relative to the cost of shingle replacement. Call us at (770) 366-3160 for a free estimate.

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