Vapor barrier question for florida

Originally Posted By: mpettitt
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In the cold climates the vapor barrier always goes to the conditioned side of the home. Many times here in Florida I’ve seen insulation with the vapor barrier on the outside, like facing down when you’re looking up in between floor joists. I’ve asked around and some people said its done that way because the barrier should face the warm side due to most buildings having the air conditioning on, the warm side would be the outside. I’m not sure I agree with this but would really like to clear this up so I can report accordingly. Any thoughts from the experts? Thanks


Originally Posted By: mpettitt
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This must be a tough one, does anyone have any comments when they see the paper side down on the insulation in basements or crawls (in Florida) thanks


Originally Posted By: clawrenson
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Great question - perhaps the following site may be of assistance. Personally it is one of my favourites.


http://www.buildingscience.com/housesthatwork/hothumid/orlando.htm

http://www.buildingscience.com


--
Ontario Home Inspections Inc.

Originally Posted By: Mark Dudley
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Vapor barriers are required in florida if the crawlspace is unvented, or if it’s venting doesn’t meet minimum requirements. Even then, you may see a vapor barrier for a vented crawl space. High humidity and a high water table means we get a LOT of humidity forming from the ground. If you put plain bare insulation facing out, it wouldn’t take long for it to become saturated with water.



http://www.thehomeforums.com/

Originally Posted By: mpettitt
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Claude, thanks for the links, it seems even the experts have varing opinions, good reading. Mark, so if I see the vapor barrier is exposed in a crawl space (facing down) this would be proper or okay, right?. The way you stated it does make since (I think) for Florida. As of yet I’ve never mentioned it either way unless I saw problems.