Roof Leaking Around Vent Boot

When the roof vent is leaking the actual cause must be identified first.

Roof leaking around vent boot.

Dig out any cracked or dry caulking that isn t properly sealing adjoining surfaces and replace with silicone caulk. A plumbing vent pipe is a common culprit for leaks. If the rubber boot is cracked rotted away or torn. Roof vent pipes are common areas for roof leaks.

Metal flashing and vent boots work together to prevent water. Sun exposure and heat especially during the summer can cause the rubber boot to crack creating the space for water to leak in. Here are four common problems that can cause water to leak around vent pipes. Roof vent pipes from plumbing or exhaust vents penetrate the roof and are usually sealed using a collar style flashing made out of a flexible material like epdm rubber or flexible pvc.

Leakage due to improper installation of the vent pipe boot would present as water stains dark spots and or wet areas on the under side of the roof sheeting. Rusty and cracked collars around the vent pipe can allow rainwater to pool and eventually drip into. If any of these issues are present water will be able to enter your roof along the pipe. Replace any missing or rotted siding above the step flashing on dormers.

Recaulk the corner flashing if any areas have hardened caulk. Other causes of leaking roof vent are including broken seams on the metal base loosen nails and rusty metal collars around the vent pipe. A vent pipe boot can leak either from improper installation or more likely from a split in the rubber where it fits around the pipe. 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.