Quote:
Originally Posted by kermitology
I've discovered that I'm in this situation. My daughter swamped our bathroom about a month ago and I had water leaking from a light fixture and an in-ceiling speaker. I hadn't gotten around to re-installing the speaker after drying things out and over the cold snap found water dripping from the hole when I ran the laundry. The main plumbing vent seemed to be condensing and dripping, so when I went up to the attic I found condensation lots of the OSB. Figure that I need more ventilation as the soffit vents don't seem to be cutting it.
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Condensation is the result of warm, conditioned air entering the cold attic. You might be able to reduce it with additional attic ventilation, but usually fixing the problem requires better sealing off the warm air from entering in the first place.