If you live in Fort Lauderdale, you've watched it happen: you get your house washed, and within months, green streaks are already creeping back. It's not your imagination — South Florida's environment is uniquely hostile to clean exteriors.
The Perfect Storm: Heat + Humidity + Rain
Fort Lauderdale's climate checks every box for rapid organic growth:
- Average humidity: 73% — organisms need moisture to thrive, and they never lack it here
- Average temperature: 76°F — warm enough for year-round growth
- Annual rainfall: 60+ inches — constant moisture replenishment
- 250+ days of sunshine — UV feeds photosynthetic organisms
Meet Your Uninvited Tenants
Green Algae (Chlorophyta)
The most common exterior contaminant in Fort Lauderdale. Green algae thrives on stucco, concrete, and any surface that retains moisture. In our climate, it can visibly colonize a clean surface in as little as 4-6 weeks.
Gloeocapsa Magma (Black Streaks)
Those dark streaks on your roof? That's a cyanobacteria called Gloeocapsa magma. It produces a dark pigmented sheath to protect itself from UV radiation — which is what creates the visible staining. It feeds on the limestone filler in concrete roof tiles and asphalt shingles.
Lichen
Lichen is a composite organism — a partnership between algae and fungus. It's the most stubborn contaminant because it physically roots into porous surfaces like concrete tile. Pressure washing alone won't remove established lichen; it requires chemical treatment to kill the organism before removal.
The Only Real Solution: Regular Professional Soft Washing
You can't change Fort Lauderdale's climate. But you can establish a maintenance schedule that keeps organic growth from ever gaining a foothold:
- House exterior: Every 12-18 months
- Roof: Every 18-24 months
- Fencing and enclosures: Every 12 months
- Pool cages and screens: Every 12 months
Ready to schedule professional soft washing for your Fort Lauderdale property?