Moisture in Attic

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Moderator Post (s) for this thread: > Vapor retarder. by Billhart on 01/29/2008 > Kitchen Soffits by Billhart on 01/30/2008

I've read the building science website and am still confused.

I have moisture in attic and have read all the many things that can or is causing it.

I'm still confused if the "Cold" zone area calls for a vapor barrier between ceiling drywall and insulation in attic. My house is traditional ranch with tyvek on walls, vinyl siding, R19 in walls. R38 in attic blown-in, no vapor barrier in ceiling.

I have a ridge vent and plenty of soffitt vents. Problem came from running humidifer unchecked... poor bathroom vents and I suspect no vapor barrier.

Does it need a vapor barrier? If yes, Can spray foam (icynene - professionally applied) be put down to form a barrier on to topside of drywall?




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