Roof Leaking Around Vent Boot

Recaulk the corner flashing if any areas have hardened caulk.

Roof leaking around vent boot.

Replace any missing or rotted siding above the step flashing on dormers. Here are four common problems that can cause water to leak around vent pipes. 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. When this happens the water can seep into the house along the pipe.

If any of these issues are present water will be able to enter your roof along the pipe. If the rubber boot is cracked rotted away or torn. If your shingles are still in relatively good condition chances are that water seeps around a plumbing vent that goes through the roof. Other causes of leaking roof vent are including broken seams on the metal base loosen nails and rusty metal collars around the vent pipe.

Rusty and cracked collars around the vent pipe can allow rainwater to pool and eventually drip into. Metal flashing and vent boots work together to prevent water. Often the rubber boot on the vent will be worn or torn the metal plastic base will have a crack or broken seam or a few nails will be loose or missing. Sun exposure and heat especially during the summer can cause the rubber boot to crack creating the space for water to leak in.

Dig out any cracked or dry caulking that isn t properly sealing adjoining surfaces and replace with silicone caulk. 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 vent pipes are common areas for roof leaks. 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.