Fixer1234 Jun 16 17 at 1714. This is the first thing you have to check.

A Home Inspector Reveals The 6 Signs Your House Is In Trouble Bathroom Exhaust Fan Bathroom Fan Bathroom Exhaust
First inspect the damper on the outside.

Bathroom vent leaking water. If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent. Faulty Flashing Vent Cover or Damper. If the bathroom fan is dripping water when it rains it means that the flashing or some part of the vent cover is allowing in water.
If your bathroom vent fan has water leaking around or next to it the problem may not be your roof but could be the ventilation system itselfIn cold climat. It can also cause mold to grow on the ceiling around the fan vent which you will have to remove before it causes health problem. Most air vent styles prevent direct intrusion of water.
Discussion in Electricians Talk started by SyThai Jan 9 2008. But have had call from customer saying he is getting drips of water sometimes through ceiling vent and also water is collecting in the ducting. The vent pipes join together in the attic from two bathrooms.
So to see more Id have to cut into it through the vapour barrier and drywall. They vent thru a turbine attic vent. The fan has a duct that has a flap at the end.
You may notice water dripping during or shortly after taking a shower. Dripping and water collecting in flexi ducting. Insulate your ventilation pipe to more effectively control the temperature and prevent condensation.
Whats required to fix it depends on what the problem is. As an installation in the ceiling the bathroom exhaust fan or vent is a common exit point of water that leaked from these areas. Thus it is important to figure out what is causing the fan to drip.
Bathroom fan leak in winter. In most of the dripping water from the bathroom fan cases this is the main culprit that you have to consider first. If water drips from the bathroom exhaust fan the damper that normally controls the flow of air through the pipe may not be working correctly.
This just allows water to accumulate and may cause a large leak when the water lets go. It is often reported during the winters. Sometimes water drips from a bathroom fan because its too cold.
As it combines with the cooler air from the attic or the outside it gets condensed. So above the bathroom is a decorative gap before the roof. It should open only under pressure from the warm air to let it out and remain closed the rest of the time.
It could be as simple as pulling some debris out of the vent or caulking or more complicated. The moment you see the fan leaking it is a sign of the vent covers damage. Water dripping from air conditioning vent in the ceiling or wall is a huge problem to have.
This issue usually arises when the cover is not placed firmly. The problem might be the condensation in the cold duct. It also may be that the damper flap is loose or missing --- and is allowing in water.
Imagine sleeping or working with water dripping on your head or on your face. Imagine having to mop the floor every time you turn the AC on. There are several areas where it might be leaking from.
For many years contractors installed bath fan vent ducting incorrectly creating a bend or low loop to catch condensation. With dripping water coming from a bathroom exhaust fan its an indicator that the flashing or vent cover could be allowing water in where it shouldnt be. Long story short I finally found the water was coming down the vent pipe from the ceiling.
It could also mean that the damper is loose or missing. In short you will have to get someone onto. There is a good chance that there is condensation inside the duct.
The first steps would be looking at the vent up close and looking inside the bathroom fan housing during a rain to see where the water is actually coming from. The warm air that is full of moisture moves up in the bathroom. You are probably right about it being the vent stack both go into the area of the leaky fan.
If its pretty chilly in your attic and you have condensation problems with your fan inadequate attic insulation may be. As the condensation forms on the wall of the ventilation duct it begins to drip back down into the bathroom. And on occasion a hard driving rain with whipping wind will cause roof vents to leak water.
The moment the damp gets loose or gets missing the fan would start leaking. A leaking bathroom fan can stain ceilings and even cause moisture damage. The faulty damper permits the water to the dropdown.
Also included are tips on how to stop the leaking. The most reported cause of the bathroom vent leaking water when it rains is condensation. The water leak itself will cause problems.

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