Installing Flashing For A Roof Vent

How to install roof flashing for a vent.

Installing flashing for a roof vent.

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. The flashing for your plumbing vent needs to be large enough to surround the vent so it should be just wider than the vent s diameter. Install galvanized metal flashing. The best method for sealing valleys is to install a strip of roofing felt or a waterproof membrane in the valley over the roof deck before installing roofing felt.

Place the new flashing over the vent and into the correct position. Step 2 loosen shingles. Further your step flashing pieces need to be 10 inches 254 mm long and at least 2 inches 50 mm wider than the exposure of the shingle you re using. 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.

Slide the new flashing over the vent pipe and under the shingles above the pipe. Install the flashing by sliding it into place so that it is sitting under the tiles above it. Apply a bead of asphalt roof cement on the bottom of the vent. How to install vent pipe flashing on an existing roof step 1.

It is important that. Most will need an extension ladder. Traditional flashings still work. Step 3 install new flashing.

Step 4 complete finish work. Step 1 climb to the roof. It s soldered to a roof flange that layers into the shingles. You ll need to get on the roof to install a new flashing.

Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof. The flashing should be installed under the. The lower half of the flange sits on top of the shingles. The traditional pipe flashing is a soldered lead riser pipe that encloses the vent pipe and folds in the pipe at the top.

Pry back the shingles that are above and on both sides of the vent pipe using a pry bar. Use the mallet to gently tap down the sides of the flashing so that it follows the profile of the tiles. Nail the lower corners with roofing nails and tar the heads. These need to be fabricated or ordered to match a specific roof pitch and pipe diameter.