Over time the flashing around plumbing vents can rust or deteriorate and it will need to be replaced.
Installing vent pipe roof flashing.
Next place your vent flashing on top of the membrane.
Carefully remove all the shingles from the flashing.
Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane in place.
Apply the roofing felt on the roof cutting a hole for the vent pipe.
Use one roofing nail in each corner of the flashing to secure it to the roof.
Apply the last row of shingles that is just below the vent pipe as shown in figure 1.
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.
Remove the old and clean the pipe.
It s soldered to a roof flange that layers into the shingles.
Cut some membrane material to seal between the vent flashing and the roof and cut an opening for the vent.
When you install roof flashing you will need to use a sealant.
Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place.
Continue the next row of shingles cutting a hole for the vent pipe.
1 remove nails holding down shingles above the pip.
Be sure to clean the outside of the pipe from old caulk that could be in the way of the flashing.
If nailed to both the flashing may deform under the pressure from shifting brick or wood.
Slide the new flashing over the vent pipe and under the shingles above the pipe.
Put one nail in the bottom edge with a dab of caulk under it to seal the.
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.
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.
Roofing nails per side photo 2.
These need to be fabricated or ordered to match a specific roof pitch and pipe diameter.
The traditional pipe flashing is a soldered lead riser pipe that encloses the vent pipe and folds in the pipe at the top.
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.
Figure 1 install shingles just below vent pipe.
