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 |
|---|
| Shingles | Knocks off protective granules. | Granules stay in place. |
|---|
| Algae and mildew | Roots stay and streaks return sooner. | Cleaner kills growth at its base. |
|---|
| Water intrusion | Can force water under the roof surface. | Gentle flow that follows the way rain runs. |
|---|
| Tile, flat, and metal | Can chip tile and scar coatings and membranes. | Safe on tile, flat roofs, metal, and shingle. |
|---|
Miami Gardens roofs mix shingle and concrete tile across decades of construction, with much of the single-family stock dating to the 1960s through the 1980s in the city's older neighborhoods. Heat and humidity grow algae and mildew on both, often worst on roofs that have gone years without attention. On tile, pressure stays far below the roughly 1,200 psi ceiling tile care guides set, with a concrete-compatible cleaner doing the work and footing limited to where tiles overlap.
Miami Gardens is inside Miami-Dade County's High-Velocity Hurricane Zone, and roofing products installed here need a Miami-Dade Notice of Acceptance. We clean roofs. On an older roof that's gone a long time without attention, we tell you plainly what we see, since repairs and re-roofing belong to a licensed roofer. Roofs in the city's oldest neighborhoods, particularly Carol City and Bunche Park, typically need washing sooner than the newer construction near the commercial corridors and Hard Rock Stadium.
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 Miami Gardens