Here in Florida the air conditioner is making us seal up the houses better. Back in the olden days the objective was to get as much air flow as you could get to equalize indoor and outdoor humidity. Now we try to make the house "tight". One thing does raise it's ugly head. Everything they "know" in the more temperate climates about vapor barriers is exactly opposite here. We don't really have a heating season so the "warm moist air" is virtually always on the outside, so that is where the vapor barrier goes. This usually shows up in the attic where a "yankee" trained installer will put the vapor barrier down and the insulation gets muddy.
