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Instaling roof vent flashing.
Flashing is installed to surround roof features such as vents chimneys and skylights.
After selecting an area to install from inside the building square the template between the roof rafters and outline with a marker.
Using a sawzall cut any roofing nails in the area of the lower mounting plate flush with the sheathing.
The metal flashing must overlap the material not the other way around.
Begin by removing the shingles at the affected area and removing old flashing if present.
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.
Roofing nails per side photo 2.
Use one roofing nail in each corner of the flashing to secure it to the roof.
1 remove nails holding down shingles above the pip.
Then nail the new l shaped flashing under the builder s felt but above the fascia board.
Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place.
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.
Next use a reciprocating saw with a rough in blade to cut the out the marked template.
The traditional pipe flashing is a soldered lead riser pipe that encloses the vent pipe and folds in the pipe at the top.
These need to be fabricated or ordered to match a specific roof pitch and pipe diameter.
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.
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.
Next place your vent flashing on top of the membrane.
Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer.
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.
