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Attic condensation?

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Just recently noted a small degree of mositure on the roof sheathing just above the soffit in my finished attic. I have soffit vents every 18 inches along the sofitts and a ridge vent. Additionally, I have Corning rafter spacers with R15 with a good vapor barrier on the entire roof. Any ideas why I have condensation? Perhaps warm air getting in somehow? Inadequate venting? I'd appreciate any feedback. Thanks. D

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pull down attic stairs, recessed light fixtures, bathroom fan venting into attic are the primary reasons for moisture in attic.

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if the condensation is on top of the roof- on the outboard side of the vertical walls (the roof overhang)- i think you are alright

 

that part of the roof would be cooler than the portion over the living space, at least to some degree, and the temperature was below the dew point while the portion over the living space was above it-

 

that said, you could use more insulation from the sounds of it, but i don't think you need to panic

 

and you sure don't need to stuff the eaves with insulation, but you knew that

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