Water in my Attic

I noticed today that in my attic a good number of roofing nails have ice on them, and when the ice melts I get water drops all over the place. Some of my panels are also moist to the touch. Up here in New England, we've had below freezing temperatures for a few days now. Is the bitter cold causing my problem, and is it anything to worry about? I've never heard of roofing nails getting ice on them....
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Rick Kasten wrote:

It is potentially serious, depending on a lot of factors. Maybe you got lucky and caught it soon.
Lookie here: http://www.allergybuyersclub.com/faqs/moldy-attic.shtml http://www.ronhungarter.com/ventilation_repairs.html
Finding the source of the moisture is one first step. Could be things like exhaust fans vented into attic, lack of vapor barrier below insulation.
Can even be moisture from products of combustion inside the chimney/. A poorly sealed chimney liner will allow moisture to pass thru the brickwork into an attic. Saw one case where it was practically raining in the attic from this.
Play detective before deciding what to do.
Jim
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You have too much moisture or heat in the attic. That means you have a moisture source, like a bathroom vent going into the attic (very bad idea that some builders like to do), a bad or lacking vapor barrier, or you don't have enough ventilation in the attic. Attics need to be ventilated both summer and winter.
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Joseph E. Meehan

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