Attic insulation and vapor barrier (phx, AZ)

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  #1  
Old 05-26-05, 02:40 PM
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Attic insulation and vapor barrier (phx, AZ)

I purchased this 1978 home just a couple months ago. Last week my father was down from Colorado checking out the new place. We were installing an attic fan when he noticed the vapor barrier placed on top of the blown in attic insulation. He brought up a point that moisture managing to get up into the insulation will get stuck in there and not evaporate. He is on a construction crew in CO and says this is not the way they do it up there, but that because of climate differences maybe it ok out here.

Does anybody know if this vapor barrier on top of the attic insulation is good or bad in hot dry climates?
 
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  #2  
Old 05-26-05, 06:27 PM
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Because of Arizona's dry climate, vapor barriers are not used. The vapor barrier you found on top of the insulation is probably a radiant barrier. Which is quite common in Arizona.
 
  #3  
Old 05-27-05, 01:00 AM
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radiant barrier? I will google that and compare with what I have. thanks!
 
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