It s soldered to a roof flange that layers into the shingles.
Installing vent pipe roof flashing.
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.
Over time the flashing around plumbing vents can rust or deteriorate and it will need to be replaced.
Next place your vent flashing on top of the membrane.
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.
Put one nail in the bottom edge with a dab of caulk under it to seal the.
If nailed to both the flashing may deform under the pressure from shifting brick or wood.
Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place.
The main reason homeowners choose to install or replace the vent pipe flashing on their roof is to stop or prevent leaks which may also help extend the lifespan of the roof.
Carefully remove all the shingles from the flashing.
The traditional pipe flashing is a soldered lead riser pipe that encloses the vent pipe and folds in the pipe at the top.
Apply the last row of shingles that is just below the vent pipe as shown in figure 1.
When you install roof flashing you will need to use a sealant.
Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane in place.
Be sure to clean the outside of the pipe from old caulk that could be in the way of the flashing.
Remove the old and clean the 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.
While roofing professionals occasionally use nails when flashing they must choose whether to nail to the roof plane or the vertical wall.
Apply the roofing felt on the roof cutting a hole for the vent pipe.
Roofing nails per side photo 2.
These need to be fabricated or ordered to match a specific roof pitch and pipe diameter.
How to install flashing around a vent pipe five steps to replace a vent pipe flashing 1.
1 remove nails holding down shingles above the pip.
Figure 1 install shingles just below vent pipe.
Use one roofing nail in each corner of the flashing to secure it to the roof.
