Slide the rubber boot over the pipe to check the fit.
How to seal around vent pipe in roof.
How to seal a plumbing vent pipe on the roof 1.
The roof vent pipe is installed cut through the roof and around the pipe attached to the roof is surrounded with rubber boot as insulation for the gap between the pipe and roof.
Apply a thick bead of lap seal caulk around the seam between the vent pipe and old rubber gasket.
Cut away the old caulk from around the vent pipe.
You can do this by running a putty knife across 10 inches of the top row.
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.
Apply a thick bead of lap seal caulk around the seam.
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.
Some nails will be near the bottom of the pipe others.
Then run a second bead of caulk just below the first bead.
This will ensure that the shingle doesn t lift off of the flashing.
Insert the putty knife under the corner of the flashing where it is nailed to the roof to protect the shingles.
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.
Here s how to seal around a vent pipe by replacing them.
Any areas on the roof that will allow water to run uphill and under shingles needs to be fixed before waterproofing your roof vent.
You need to do this in.
There may be nails positioned underneath the shingles across the top row.
Remove the rubber boot.
Use the knife blade to scrape the pipe clean and smooth.
Remove the nails that hold the vent pipe flashing to the roof.
Using a silicone sealant and caulking gun seal any shingles that are of concern around the three open sides.
Steps for fixing a leaking rooftop vent pipe.
