Bathroom Vent Leaking Water When It Rains

Bathroom exhaust fan leaking water when it rains.

Bathroom vent leaking water when it rains. Water from the roof. You look up half expecting to see the shower head somewhat extended only to see the ceiling vent. 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. 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.

A drop of water falls on your head. We had some water leaking onto the kitchen stove from the exhaust fan above it during the last couple of heavy rains. 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.

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. I have a bathroom fan that leaks during heavy rains. Vent cap with a proper stand off from the roof. Whether wind driven rain will be a problem remains to be seen.

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. 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. It this is the case you need to create a breathable shield to slow the driving rain drops while still allowing air flow. It could be as simple as pulling some debris out of the vent or caulking or more complicated.

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. Fixer1234 jun 16 17 at 17 14. During the last storm it even started leaking through the ceiling light which is about 4 feet away from the exhaust fan on the ceiling.

What s required to fix it depends on what the problem is. 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. We have inspected the attic and there is no rotting wood and we cannot figure out how to stop the problem. You re now at a loss as to why water came out of there.

And on occasion a hard driving rain with whipping wind will cause roof vents to leak water. It seems like it may be coming in through the vent when the rain wind blows sideways during a heavy rain fall.