How To Seal Leaky Roof Vent

Apply a thick bead of lap seal caulk around the seam.

How to seal leaky roof vent.

See below for a shopping list and tools subscribe to. This old house general contractor tom silva shows how to create a watertight seal around a vent pipe. Steps for fixing a leaking rooftop vent pipe. Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe.

A bad lead jack becomes a leaky roof vent because it starts to dry rot in the sun. And it shrinks and moves and loses that seal that was causing it to be waterproof. When the roof vent is leaking the actual cause must be identified first. Cut away the old caulk from around the vent pipe.

Given the most common causes is cracked or damaged rubber boot the most ideal solution is to remove it and replaced it with a new one. Fix a leaky roof vent pipe with a oatey rubber gasket. For this it is better to hire a professional roofer to handle the work. A code lead jack is going to be much better because it has a much larger base to it which sits flat on the roof.

Start by removing the old lead jack and removing shingles around it. Install a code lead jack in its place. Use the knife blade to scrape the pipe clean and smooth.