roof vents and the mysterious midnight drip

Good points all around. Ventilation definitely helps, but I've seen plenty of cases where homeowners chased ventilation fixes for months only to find out it was a tiny leak around a vent boot or nail hole. Had one client swear it was condensation until we finally spotted a hairline crack in the plumbing vent flashing. Moisture issues can be tricky - sometimes it's worth getting up there during or right after heavy rain to really pinpoint what's going on...

- Good call on checking after heavy rain, but honestly, I've found moisture issues aren't always rain-related.
- Had a tenant once with a persistent drip - turned out to be attic ductwork sweating from AC running overtime in humid weather.
- Sometimes it's worth looking beyond the roof itself... HVAC lines, bathroom exhaust ducts, even insulation gaps can cause weird drips.
- Roof leaks are sneaky for sure, but don't rule out interior sources either.

Had something similar happen last summer. Thought for sure it was a roof vent leaking, but nope - turned out the bathroom exhaust fan duct had slipped loose in the attic. Hot, humid air was just pouring up there, condensing and dripping back down. Took forever to pinpoint... almost blamed the roofer unfairly, lol. Definitely worth checking those interior ducts and connections before climbing all over the roof again.

Had a customer last year convinced his skylight was leaking. I spent two afternoons up there, hose in hand, scratching my head. Finally poked around the attic and - yep - bathroom fan duct had popped off. Humidity was just pooling up there and dripping down at the weirdest times. Lesson learned: always check those sneaky ducts first before blaming the poor roofer, haha... saves you from unnecessary rooftop gymnastics.

"Humidity was just pooling up there and dripping down at the weirdest times."

Exactly - I've seen this a few times myself. Another sneaky culprit is improperly insulated ductwork. Even if the duct hasn't disconnected, condensation can form on the outside if the insulation is inadequate or missing altogether. It can mimic a roof leak pretty convincingly, especially during colder months. Always worth a quick insulation check before climbing onto the roof and chasing phantom leaks... learned that one the hard way myself.