Residential architects who specialize in the hot, humid, southern climate

4. MOLD!

If the house smells like mold...find the mold and get rid of it! Hot humid air should be kept out of the house. It the house is on a crawl space, the crawl space should not have vents, it should be insulated at the walls and conditioned. The same goes for the attic; the attic should be insulated at the roof and conditioned. All Heating, Air-Conditioning, and Ventilation (HVAC) ducts should be within the conditioned envelope of the house. Exterior walls are going to get wet; provide a drain plain to facilitate drying between the exterior sheathing and exterior finish siding. This is a photo of a blower door test, that checks for leakage in the exterior skin of the house.