Photo courtesy of angie s list member james c. 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.
Redirect water away by installing what s called a cricket.
Bathroom exhaust fan roof vent leaking. A defective roof vent cover. Is your bathroom exhaust fan leaking moisture. Bathroom exhaust fans should remove moisture from the bathroom to the exterior of the home.
Create a more secure water barrier by replacing the flashing and surrounding shingles. Other causes of leaking roof vent are including broken seams on the metal base loosen nails and rusty metal collars around the vent pipe. Roof vents are made from different materials.
Leave the drill bit sticking through the roof so you can find the hole. 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. It also may be that the damper flap is loose or missing and is allowing in water.
In short you will have to get someone onto the roof to fix it. Start in the attic and drill a hole through the roof in the desired vent location. An exhaust fan pulling warm moist air from the bathroom and distributes the air to the attic could lead to mold growth and wood rot says jimenez.
When the roof vent is leaking the actual cause must be identified first. Replace the cover of the chimney. Sun exposure and heat especially during the summer can cause the rubber boot to crack creating the space for water to leak in.
From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. Water stains on the ceiling around your bath fan may indicate a leak coming from the vent cap on your roof but condensation is the more likely culprit. Here are the possible solutions.
If bath fan ducting isn t properly insulated the moist air from your house will condense inside the duct. Try to keep it close to the fan location. Fill gaps and holes using a flexible roof sealant.
The first step is to head to the attic. 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.