Yeah, temperature swings can definitely mess things up. Had something similar happen last winter—kept hearing this weird dripping sound at night, drove me nuts trying to track it down. Turned out it was condensation forming inside the attic vents during cold snaps, then dripping when things warmed up again. Ended up adding some extra insulation around the vent pipes and sealing a few gaps with spray foam. Not exactly fun crawling around up there, but it did the trick.
If you're tackling this yourself, just take your time and don't rush it. Wear gloves and a mask if you're messing with insulation—fiberglass itch is no joke. And like mentioned above, checking exhaust fans from outside is way easier than squeezing into tight attic spaces. Good luck, sounds like you're on the right track already...
Had a similar issue a couple years back—kept hearing this faint dripping noise right above the bedroom ceiling. Thought I was losing my mind, especially since it only happened on warmer days after a cold snap. Turned out the bathroom exhaust fan duct wasn't insulated properly, so condensation was forming inside the ductwork and dripping back down. Took me forever to figure it out because the duct ran through a tight corner of the attic.
If you're checking things out yourself, definitely look at any exhaust ducts running through unheated spaces. Make sure they're insulated and sealed up tight, especially at joints and connections. Also, double-check that your roof vents aren't blocked or partially covered by insulation—seen that happen a few times, and it can really mess with airflow and cause moisture buildup.
And yeah, crawling around in fiberglass insulation isn't exactly my idea of a good time either...but it's worth it to finally get some peace and quiet at night. Good luck!
Had a similar experience at one of the properties I manage—tenants kept reporting a weird dripping sound, mostly at night. Took ages to pinpoint it, but turned out to be exactly what you're describing: condensation in poorly insulated ductwork. Your advice about checking ducts in unheated spaces is spot-on. It's tedious work, especially navigating tight attic corners, but definitely worth the effort for peace of mind and preventing bigger moisture issues down the line. Good catch on your part.
Had something similar happen at my place last winter. Kept hearing this faint dripping noise around midnight, drove me nuts trying to figure it out. At first, I thought it was a leak in the roof or maybe a pipe issue, but everything looked dry. Finally climbed into the attic (not fun, trust me) and found condensation forming on the ducts up there. Turns out the insulation was pretty thin in spots, letting cold air hit the warm ducts and causing moisture buildup.
Ended up adding some extra insulation around the ducts myself—wasn't too expensive, just a bit messy and cramped. Haven't heard the dripping since, and it probably saved me from bigger issues down the road. Definitely agree it's worth checking those hidden spaces, even if it's a hassle.
Had a similar mystery drip at my folks' place a couple years back—turned out to be ice dams forming near the roof vents. Took forever to pinpoint. Did you notice any ice buildup around your vents when you checked yours?
