Mold Types
Mold Species Common in Lighthouse Point Homes
South Florida's year-round warmth and humidity support a wide variety of mold species.
Identifying the type matters — it determines required containment protocols, health risk
severity, and whether affected materials must be removed or can be treated in place.
Cladosporium
Found in: HVAC systems, ductwork, window sills
Appearance: Olive-green to black, powdery or velvety texture
The most prevalent mold in Lighthouse Point homes. Thrives in HVAC systems running near-continuously in South Florida's heat. Cladosporium grows on condensate-wet surfaces inside air handlers, on ductwork seams, and around window seals exposed to humidity differentials. Generally less toxic than Stachybotrys but triggers respiratory issues in sensitive occupants.
Penicillium
Found in: Water-damaged drywall, insulation, cardboard, carpet
Appearance: Blue-green, sometimes white; fast-spreading colonies
Found wherever drywall or insulation has been wet and not fully dried within 48 hours. Extremely common after Lighthouse Point canal flooding or HVAC condensate overflow. Penicillium spreads rapidly across surfaces and can go airborne with minimal disturbance. Often the first mold type found in walls after stucco crack moisture intrusion.
Stachybotrys ("Black Mold")
Found in: Drywall, wood, paper — requires chronic moisture (weeks)
Appearance: Slimy black or dark greenish-black colonies
The most serious mold type — requires sustained moisture for 1–2 weeks to establish. In Lighthouse Point, Stachybotrys develops in wall cavities with undetected stucco crack leaks, under leaking HVAC drip pans, and in subfloor assemblies following storm flooding. Produces mycotoxins linked to severe respiratory and neurological symptoms. Requires full containment and all affected materials removed and replaced.
Aspergillus
Found in: HVAC systems, food storage areas, damp organic materials
Appearance: Highly variable — white, green, yellow, brown, or black
Common in South Florida homes due to year-round warmth and humidity. Over 180 species of Aspergillus exist. In Lighthouse Point, it typically appears in HVAC systems alongside Cladosporium and in pantry areas or attic spaces with high humidity. Some species produce aflatoxins. Older Lighthouse Point homes with poor attic ventilation are especially prone.
Alternaria
Found in: Showers, bathtubs, window frames, under sinks
Appearance: Dark gray or olive-green, velvety texture
An allergenic mold common in bathrooms and areas with persistent surface moisture. In Lighthouse Point homes, Alternaria appears wherever shower grout, caulk, or window sealing has aged and allows moisture to accumulate. Frequently found in older CBS stucco homes where bathroom tile grout has cracked. Strong allergen — triggers asthma attacks in sensitive occupants.
Chaetomium
Found in: Wet drywall, paper, wood — post-water damage
Appearance: White then gray, then dark brown/black; musty smell
A post-water damage mold that grows on water-saturated drywall and paper materials. In Lighthouse Point, Chaetomium is found after canal flooding, storm surge events, and long-term HVAC leaks where drywall has remained wet. It produces a characteristic musty odor and releases mycotoxins similar to Stachybotrys in severe cases. A useful early warning indicator — its presence means drywall was wet long enough to require removal.