How To Install Vent Pipe Flashing On Existing Roof

How to retrofit the ultimate pipe flashing on an existing roof.

How to install vent pipe flashing on existing roof.

How to retrofit the ultimate pipe flashing on an existing roof. Use roofing nails to install the l shaped flashing flush with the roof and wall then cover it with roofing cement and reattach the roofer s felt. Hammer the nails into the top and sides of the flashing. Center the pipe in the flashing and push the flexible front corners up or down so that the flashing pipe is parallel to the vent pipe.

The flashing should be installed under the top and side shingles but it should be laid above the shingles that are below the vent pipe. Now that the old flashing is gone you can slide the new flashing over the pipe vent and maneuver it under the shingles above the pipe. Using a sawzall cut any roofing nails in the area of the lower mounting plate flush with the sheathing. The neck of the flashing should fit snugly around the pipe.

After selecting an area to install from inside the building square the template between the roof rafters and outline with a marker. To install vent pipe flashing you will be placing the upper portion below the shingles while allowing the bottom portion that extends below the pipe to lay exposed on top of the shingles. Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place. Plenty more videos t.

Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof. Use one roofing nail in each corner of the flashing to secure it to the roof. Begin by removing the shingles at the affected area and removing old flashing if present. Then nail the new l shaped flashing under the builder s felt but above the fascia board.

To make the installation easier you can turn the flashing as you lower it in place. Lifting the shingles around the vent if you ve already laid them or they re already part of an existing roof slide the upper portion of your vent flashing beneath them.