ARMA-approved soft wash method removes black streaks and algae without damaging protective granules.
Those ugly black streaks on asphalt shingle roofs aren't just cosmetic—they're caused by Gloeocapsa Magma, a cyanobacterium that feeds on the limestone filler in shingles and actively degrades your roof.
The Asphalt Roofing Manufacturers Association (ARMA) specifically recommends soft wash cleaning as the only approved method for asphalt shingles. Pressure washing strips away protective granules, shortens roof life, and voids manufacturer warranties.
They're caused by Gloeocapsa Magma, a cyanobacterium that feeds on limestone in shingles. It's not just ugly—it actively damages your roof.
No. Soft washing is the ARMA-recommended method and is approved by all major shingle manufacturers. Pressure washing, however, will void most warranties.
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