How To Replace A Roof Vent Pipe

With the pipe in a vertical position trace around the pipe using a pencil.

How to replace a roof vent pipe.

Cut away the old caulk from around the vent pipe. How to replace the box vent on your roof. See below for a shopping list and tools subscribe to. Remove any roofing nails and slide out the shingles.

Pry up the old jack and remove it by pulling it up over the vent pipe. Position the vent pipe up to the bottom of the roof. Use the knife blade to scrape the pipe clean and smooth. This old house general contractor tom silva shows how to create a watertight seal around a vent pipe.

Slide the new flashing over the vent pipe and under the shingles above the pipe. Video turorial on how to change out a plumbing vent boot. The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof. Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe.

Apply a thick bead of lap seal caulk around the seam between the vent pipe and old rubber gasket. Go into your attic. Works for any size pipe. Slide a new roof jack sized to fit your vent pipe over the pipe.