Florida Humidity Is Different
Average relative humidity in South Florida hovers between 70–80% year-round, with peaks during the rainy season exceeding 90%. Almost every building material responds to moisture. The rate at which materials degrade in Florida is faster than almost anywhere else in the country.
What Humidity Does to Your Home
Doors and windows — Wood absorbs moisture and expands. Doors that fit perfectly in winter stick in summer.
Trim and baseboards — MDF trim near exterior walls or in bathrooms can swell, warp, and separate.
Paint and wall surfaces — High humidity contributes to paint failure and mold growth beneath the surface.
Caulk and seals — Repeated expansion and contraction degrades caulk faster. Inspect annually.
HVAC systems — Florida HVAC systems remove significant moisture from the air. A system that's poorly maintained allows indoor humidity to rise, accelerating all of the above.
Managing Humidity
Keep the HVAC running consistently. A programmable thermostat set to 78–80°F while vacant prevents humidity buildup. Any moisture intrusion should be addressed promptly.