Look at these. http://www.buildingscience.com/designsthatwork/default.htm For the hot-humid climate 3 or 4 used a conditioned attic. http://www.buildingscience.com/designsthatwork/hothumid/default.htm http://www.buildingscience.com/topten/south.htm http://www.buildingscience.com/resources/roofs/default.htm
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