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.

Hammer the nails into the top and sides of the flashing. See other blogs for a proprietary vent flashing repair kit and a repair using a boot flashing with the roof pan trimmed off. The neck of the flashing should fit snugly around the pipe. 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.

Use one roofing nail in each corner of the flashing to secure it to the roof. 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. 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. Install flashing on existing roof to extend the lifespan of your roof. Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place. Roofing nails per side photo 2.

In simplest terms a new vent pipe boot flashing is slid over the top of the existing one and the top edge of the pan is lapped beneath the overlying shingle course. 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. Finally reattach all shingles removed in the process.