Roof Leaking Around Exhaust Fan

Leading to roof leaks around skylights.

Roof leaking around exhaust fan.

A roof that leaks around a vent pipe is a common cause of small water stains on a ceiling or water leaking into a home. The usual cause is condensation inside the duct. This creates the seal. Many people notice the issue when the bathroom exhaust fan starts dripping on their head as they step out after a shower.

Even if you created a hole that s of the perfect size for the vent pipe there will still be gaps around the pipe. Roof leaks around vent pipes is relatively common. The roof vent pipe is installed cut through the roof and around the pipe attached to the roof is surrounded with rubber boot as insulation for the gap between the pipe and roof. The leaking may first be seen in the attic but if you don t catch it right away you may see water coming into the house dripping on the floor.

If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent. It this is the case you need to create a breathable shield to slow the driving rain drops while still allowing air flow. Why fix a leaking exhaust fan or ceiling vent. 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.

It s common to find stained ceilings around bathroom exhaust fans in minnesota as well as stains in the attic around where the bathroom exhaust fan terminates at the roof. If bath fan ducting isn t properly insulated the moist air from your house will condense inside the duct. In the unfortunate chance that you have a roof vent style that can let water in through its sides. In winter when the warm moist air from the bathroom hits cool air in the attic or outdoors it condenses sending drips back down the ductwork.

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. There are many possible parts of the roof potentially leaking but one of the most common ones is the area around the roof vent. We had some water leaking onto the kitchen stove from the exhaust fan above it during the last couple of heavy rains. The first step is to head to the attic.

There may be damaged insulation damaged drywall damaged wood framing and there may be mold growing. This is why roofers add a flashing to the vent cap.