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Posted by Plan Review Section on August 2, 2006, 8:29 pm
Install a lot more roof ventilation. Soffit vents, ridge vents, powered
vents with humidistat's, etc. There's no such thing as too much ventilation
in a roof cavity, cooler in summer, warmer in winter.
As insulation gets wet, it's R-value drops (dramatically). While you may
have an installed R of R38 (depends on where you live), when it wet it
could be more like a R4 (or even less). Makes the AC run harder as you loose
more conditioned air through the ceiling.
Is there a vapor retarder in the ceiling?
Are *all* joints and penetrations into the roof cavity sealed?
See to this quickly as it will cause the gyp ceiling to eventually fail. You
see dripping, there's probably saturated insulation up there with gallons of
water vapor being held. (My neighbors ceiling fell last year due to just his
problem. Lot of weight in water-soaked insulation.
If the gyp is damaged, it may not show up until later (begins to bow between
ceiling joists.) Make certain the builder is willing to come back and
correct any future problems associated with this should that be the case.
> My condo (new construction) is dripping from the ceiling and high wall
> air vents when central air's running on especially hot and humid days.
> It's really unfortunate - it's already damaged paint, and I'm worrying
> about the drywall.
> What should I ask my builder to do in order to prevent this?
>
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> air vents when central air's running on especially hot and humid days.
> It's really unfortunate - it's already damaged paint, and I'm worrying
> about the drywall.
> What should I ask my builder to do in order to prevent this?
>