Roof Cleaning in Killearn Acres

This is soft-wash work, not pressure washing. The distinction matters because the two processes do different things to a roof and only one of them is safe for asphalt shingles. Roof cleaning here means a low-pressure application of a cleaning solution formulated to kill algae, moss and lichen at the root, followed by a controlled rinse. There is no wand pressed against the shingle face and no stripping of granules.

The black streaks you see on north-facing slopes in Killearn Acres are gloeocapsa magma, a bacteria that feeds on the limestone filler in asphalt shingles. Left alone it spreads, and it holds moisture against the shingle longer than a clean roof would, which shortens the life of the material underneath. Cleaning it isn’t cosmetic maintenance. It’s removing something that’s actively degrading the roof surface.

Granule loss is the real risk with the wrong method. Every shingle sheds a small number of granules over its life, but a pressure washer strips them by the handful, and once the granule layer is gone the asphalt underneath is exposed to UV with nothing protecting it. A soft-wash approach avoids that entirely because there’s no mechanical force hitting the shingle, just chemistry doing the work at a pressure closer to a garden hose than a driveway cleaner.