Don't you know I can't find the site, but there is one that actually gives recommendations specific to Louisiana residents. I'm not sure, but I think it may have been the LSU ag center. I was surprised to find that a vapor barrier was optional for the attic insulation because of the humid climate. It is required for exterior walls, however.
Honestly, I wouldn't insulate over the patio. It may only serve to trap hot air unless you vent the cover.
Disclaimer: I'm a DIY, not a roofer so definately get other opinions and Google
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To insulate my new patio cover or not ~ input?
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