Why Florida Driveways Get Dirty So Fast

Southwest Florida’s combination of year-round warmth, high humidity, and frequent rain creates ideal conditions for algae, lichen, and mold to colonize concrete and paver surfaces. A driveway that looks clean in the dry season can turn visibly dark green or black within a few months of rainy season.

Beyond appearance, algae-covered driveways are genuinely slippery and can be a safety hazard. Lichen and mold also gradually etch into porous concrete surfaces if left untreated.

Concrete vs. Pavers: Different Needs

  • Concrete — tolerates higher pressure (2000–3000 PSI); surface sealing after cleaning extends results
  • Brick pavers — require lower pressure to avoid dislodging joint sand; re-sanding after cleaning recommended
  • Travertine or limestone — soft-wash (low pressure + cleaning solution) is required to avoid etching
  • Stamped concrete — moderate pressure; sealant should be inspected after every cleaning

How Often Should You Pressure Wash?

In Sarasota, once per year before the dry season is the standard minimum. Homes in shaded areas or near tree canopy may benefit from twice-yearly cleaning. After cleaning, a concrete sealer dramatically slows algae re-growth and makes the next clean easier.