How To Install Vent Pipe Flashing On Flat Existing Roof

Put one nail in the bottom edge with a dab of caulk under it to seal the.

How to install vent pipe flashing on flat existing roof. Finally reattach all shingles removed in the process. Slide the new flashing over the vent pipe and under the shingles above the pipe. Rubber vent flashing automatically adjusts to any pitch lift the vent enough to spread caulk under the sides but not the bottom edge then nail with three 1 1 4 in. Roofing nails per side photo 2.

I ve used this repair on several roofs over the years. 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. Hammer the nails into the top and sides of the flashing. The neck of the flashing should fit snugly around the pipe.

See other blogs for a proprietary vent flashing repair kit and a repair using a boot flashing with the roof pan trimmed off. Install flashing on existing roof to extend the lifespan of your roof. To make the installation easier you can turn the flashing as you lower it in place. Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place.

Use one roofing nail in each corner of the flashing to secure it to the roof. 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. 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.