Most homeowners assume the dark streaking and discoloration on their roof is just dirt or weathering from age. It's not. Those black streaks are a specific type of algae called Gloeocapsa magma, and it spreads from shingle to shingle feeding on the limestone filler in your roofing material. Left untreated, it breaks down the shingle surface over time and accelerates wear. On Long Island, where humidity stays high through the warmer months, roofs are especially vulnerable to this kind of growth spreading fast.

Soft washing is the only method recommended for cleaning asphalt shingles. High-pressure washing forces water under the shingles, dislodges granules that protect the surface, and can void your roof warranty outright. We use a low-pressure application with a professional cleaning solution that kills algae, moss, and lichen at the root — not just on the surface. That matters because surface-only cleaning lets the growth come back quickly, while treating it at the root extends how long the roof stays clean after the job is done.

Tom handles every roof soft wash personally across Centereach, Selden, Ronkonkoma, and the surrounding Long Island areas. He assesses the roof condition before starting, applies the solution correctly, and follows up to make sure the results meet the standard before leaving your property. If your roof has been showing dark streaking or green moss buildup, this is the service that addresses it properly. Call (866) 588-9324 for a free estimate.