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Glossary

Roof Cleaning

Definition

Roof cleaning is removing the black algae streaks and moss from a roof, done exclusively by soft washing because pressure strips the protective granules from shingles.

The black streaks are gloeocapsa magma algae feeding on shingle filler. The fix is a soft wash with sodium hypochlorite, usually 2–3% at the surface, left to dwell so it kills the colony at the root rather than just rinsing the top.

Roof work commands premium pricing because of the height, the safety setup, and the stronger chemistry. It also carries real risk to plants and gutters below, so plant protection and a careful rinse plan are part of every roof job.

Part of the WashRoute Pro pressure washing glossary - 43 terms and counting.

WashRoute Pro field guide team

We turn exterior-cleaning workflows into practical guides on pricing, routes, crews, before-and-after job records, and repeat work. We mark examples clearly and update material when the trade or the product changes.

See it on your own jobs

Use customer-photo intake, review mapped RouteFill jobs whose customers chose flexible timing, run assigned CrewMode work, keep completion proof with the job, and save owner-reviewed CleanCycle renewal drafts.

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