attic condensation 6

https://wiki-cable.win/index.php/Is_That_a_Roof_Leak_or_AC_Condensate%3F_How_to_Tell_the_Difference

That drip you hear in the attic isn't a leak—it's condensation forming on cold roof nails and trusses when warm, moist air from the house meets the frozen underside of the roof. Over winter, this trapped humidity soaks into the fiberglass insulation, turning it into a soggy blanket that not only ruins its R-value but also grows black mold along the rafters. Proper venting and vapor barriers are the only way to stop this silent rot before it spreads through the whole house.