Cause the rubber to crack and it will start leaking.
Roof vent leak into wall.
If you have no eaves or you have the deep fascia gutter then the perimeter gutter will overflow in heavy rain and get into the wall cavity.
Remove debris make sure your roof valleys are clear of debris re shingle valleys valleys may need to be reshingled with new ice and water shield put in place.
Roof vents are made from different materials.
Normally if you have good eaves you will not get water into the house even if the gutters themselves are overflowing.
Dormer leaks can be caused from a number of issues.
Look for cracks in the base of flexible rubber flashing or broken seams in metal varieties of vent pipe flashing.
Sometimes the water shows up at a ceiling spot distant from the leak.
Years of sun weathering etc.
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.
Other causes of leaking roof vent are including broken seams on the metal base loosen nails and rusty metal collars around the vent pipe.
Fix a leaky roof vent pipe with a oatey rubber gasket.
What to do when your vent starts leaking.
First thing to do is to have it checked immediately.
The rubber gasket that surrounds the vent pipe could be rotted.
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.
Plumbing vent boots and roof vents check plumbing vent boots and roof vents if water is entering from that area to cause the leaking roof.
Roof leaks around vent pipes is relatively common.
Sun exposure and heat especially during the summer can cause the rubber boot to crack creating the space for water to leak in.
Some roof leaks are tough to locate.
A roof leak at the edge of a dormer can allow a lot of water to enter your home.
The flashings are installed to keep water from coming down the slope of your roof hitting the vent and running down the outside of the duct into the house.
Often water runs to openings in the vapor barrier such as at ceiling light fixtures.
When the roof vent is leaking the actual cause must be identified first.