How To Seal Around Vent Pipe In Roof

Insert the putty knife under the corner of the flashing where it is nailed to the roof to protect the shingles.

How to seal around vent pipe in roof.

Then run a second bead of caulk just below the first bead. As you lift the shingles apply the cement to the back of the shingle about six inches in. Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe. You need to do this in.

Any areas on the roof that will allow water to run uphill and under shingles needs to be fixed before waterproofing your roof vent. Apply a thick bead of lap seal caulk around the seam. Cut away the old caulk from around the vent pipe. Use the knife blade to scrape the pipe clean and smooth.

Trace the outline of the base of the rubber boot onto the metal roof with a pencil. Slide the rubber boot over the pipe to check the fit. For areas around the chimney dormer and pipe vent you may also need to pipe beads of roof cement in areas that aren t covered by shingles. Remove the nails that hold the vent pipe flashing to the roof.

There may be nails positioned underneath the shingles across the top row. Here s how to seal around a vent pipe by replacing them. Use the knife blade to scrape the pipe clean and smooth. Trim the flashing in the center of the rubber boot with a roofing knife so it fits snugly around the pipe.

Apply a thick bead of lap seal caulk around the seam between the vent pipe and old rubber gasket. Some nails will be near the bottom of the pipe others. Using a silicone sealant and caulking gun seal any shingles that are of concern around the three open sides. You can do this by running a putty knife across 10 inches of the top row.

Pry the nails that are holding the flashing. How to seal a plumbing vent pipe on the roof 1. This will ensure that the shingle doesn t lift off of the flashing. Remove the rubber boot.