Bathroom vent dripping water — Elche, Valencian Community

Water dripping from a bathroom exhaust vent is usually caused by condensation forming inside the duct when warm, moist bathroom air meets cold surfaces in the attic or exterior wall. An improperly insulated or excessively long duct run, a missing or stuck backdraft damper, or a duct that terminates inside the attic instead of outside all create conditions for condensation. In rare cases the drip signals a roof leak above the vent penetration. An HVAC technician can insulate the duct, replace the damper, reroute the vent to a proper exterior termination, and check for roof-related water intrusion.