How To Seal A Roof Vent Pipe

Steps for fixing a leaking rooftop vent pipe.

How to seal a roof vent pipe.

Remove the nails that hold the vent pipe flashing to the roof. There may be nails positioned underneath the shingles across the top row. Pry the nails that are holding the flashing. You can do this by running a putty knife across 10 inches of the top row.

Some nails will be near the bottom of the pipe others. Here s how to seal around a vent pipe by replacing them. Cut away the old caulk from around the vent pipe. Slide the replacement rubber gasket over the pipe and press it down tight to the flange.

Allow it to completely air dry. You need to do this in. Then run a second bead of caulk just below the first bead. 7 place the nozzle of the caulk tube at a point where the vent and roofing.

Apply a thick bead of lap seal caulk around the seam. Use the knife blade to scrape the pipe clean and smooth. Insert the putty knife under the corner of the flashing where it is nailed to the roof to protect the shingles. Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe.