Some of you guys in here know me, know the kind of climate I am in.
Anyways I built a place with a sealed attic, keeps the heat out in the first place, seems to have really minimized infiltration. Holding 40% RH in a real humid climate without a dehumidifier. Any of you want some details of my opinion of the sealed attic, email me
Attic is pretty bearable to be in, first test run the temps peaked at less than 85 F, averaged about 82 degrees, RH up there in mid 50s. I think my second round of tests will have it doing better than that.