Bathroom Vent Leaking Water When It Rains

You re now at a loss as to why water came out of there.

Bathroom vent leaking water when it rains.

It could be as simple as pulling some debris out of the vent or caulking or more complicated. I have a bathroom fan that leaks during heavy rains. It is not likely that water will ever get high enough to flood this vent. What s required to fix it depends on what the problem is.

Water from the roof. In this next picture we can see the care the installer took to get the same type of cap raised high enough above the roof surface to prevent leaking. This is no fancy over the stove exhaust system just a round circular fan that sits flush up against the ceiling and vents to the roof. 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.

In this article we ll discuss in full everything related to the issue of water dripping from bathroom exhaust fan or ceiling vent when it rains. When it rains water is getting through the cover and the water is traveling down the vent hose and then it is exiting from your bathroom fan onto the floor. A drop of water falls on your head. Another potential source is a buildup of ice on the roof in winter which may melt in reaction to the warm air from the bathroom.

It could be as simple as pulling some debris out of the vent or caulking or more complicated. It s also possible that the vapor barrier installed in the roof is developing condensation as a result of poor insulation and the water is pooling. We have inspected the attic and there is no rotting wood and we cannot figure out how to stop the problem. It this is the case you need to create a breathable shield to slow the driving rain drops while still allowing air flow.

Whether wind driven rain will be a problem remains to be seen. Fixer1234 jun 16 17 at 17 14. Vent cap with a proper stand off from the roof. I have checked the bathroom fan seal as well and it is not condensation because it is only during heavy rains.

You look up half expecting to see the shower head somewhat extended only to see the ceiling vent. Besides the roof it is also possible though unlikely that your bathroom fan vent goes to the exterior vertical wall and it may have just enough slope that water is still dripping. And on occasion a hard driving rain with whipping wind will cause roof vents to leak water. If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent.

The most common reason a bathroom exhaust fan leaks when it rains is because the bath vent hose is in a vertical slope and exhausts on top of the roof. It seems like it may be coming in through the vent when the rain wind blows sideways during a heavy rain fall.