Most people who search for roof pressure washing want the dark streaks gone. We get that. On asphalt shingles the streaks are usually a cyanobacterium called Gloeocapsa magma, which feeds on the limestone filler in the shingle and spreads on the wind, as the Asphalt Roofing Manufacturers Association explains. Tile, flat, and metal roofs grow algae and mildew of their own.
High pressure takes the protective surface off and can push water under the roof. We use a soft wash instead: low pressure, and a roof-safe cleaner that does the actual work.
High-pressure blasting compared with low-pressure soft wash on a roof| On your roof | High-pressure blasting | Our low-pressure soft wash |
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| Shingles | Knocks off protective granules. | Granules stay in place. |
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| Algae and mildew | Roots stay and streaks return sooner. | Cleaner kills growth at its base. |
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| Water intrusion | Can force water under the roof surface. | Gentle flow that follows the way rain runs. |
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| Tile, flat, and metal | Can chip tile and scar coatings and membranes. | Safe on tile, flat roofs, metal, and shingle. |
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Fort Lauderdale roofs run the full range: concrete and clay tile on both historic and newer homes, shingle on much of the inland housing stock, and flat or metal roofing on downtown high-rises and newer construction. Heat, humidity, and salt air from the canals and the coast grow algae and mildew faster here than on a comparable inland city. On tile we stay well under the roughly 1,200 psi ceiling tile care guides set, use a concrete-compatible cleaner, and step only where tiles overlap.
Fort Lauderdale is inside the High-Velocity Hurricane Zone, which covers Miami-Dade and Broward counties both, and roofing products installed here need a Miami-Dade Notice of Acceptance even though the home is in Broward. We clean roofs. Repairs and re-roofing belong to a licensed roofer. Roofs closest to Port Everglades and the busiest canal corridors typically need washing sooner than roofs on quieter, more inland waterways or streets farther from the water entirely.
Most roofs do well with a wash every two to three years. Shaded slopes and roofs under trees grow algae faster and may need it sooner. A damp, algae-covered roof also sheds more grit into the gutters below, which is one more reason we handle both in a single visit.
See how our roof washing works in Fort Lauderdale