Installing Flashing For A Roof Vent

The lower half of the flange sits on top of the shingles.

Installing flashing for a roof vent.

Use the mallet to gently tap down the sides of the flashing so that it follows the profile of the tiles. These need to be fabricated or ordered to match a specific roof pitch and pipe diameter. Slide the vent under the shingles so they cover the top half of the vent flange. You ll need to get on the roof to install a new flashing.

Nail the lower corners with roofing nails and tar the heads. Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof. Traditional flashings still work. Step 1 climb to the roof.

The traditional pipe flashing is a soldered lead riser pipe that encloses the vent pipe and folds in the pipe at the top. How to install vent pipe flashing on an existing roof step 1. It is important that. Slide the new flashing over the vent pipe and under the shingles above the pipe.

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. 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 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. Run a bead of silicone on the two tiles next to the flashing.

The flashing should be installed under the. Install galvanized metal flashing. Seal the top of the counter flashing and any gaps with plastic roofing cement. 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.

Most will need an extension ladder. It s soldered to a roof flange that layers into the shingles. Apply a bead of asphalt roof cement on the bottom of the vent. Step 2 loosen shingles.

Place the new flashing over the vent and into the correct position. Step 3 install new flashing. Pry back the shingles that are above and on both sides of the vent pipe using a pry bar. How to install roof flashing for a vent.