Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
How to install l flashing on a roof.
Measure the length of the porch roof joint to determine how much flashing you will need.
Next place your vent flashing on top of the membrane.
The metal flashing must overlap the material not the other way around.
If you do not wish to form your own corner flashing you can buy pre bent pieces and cut them to size or use a piece of corrugated aluminum which is easier to bend.
Prepare the area where you will install the roof flashing.
Once the cut is made you will set the flashing on the corner and nail it in place.
Once even a small section of roofing cement fails you ll have a leak.
The first piece of step flashing should overlay the last row of shingles.
Step flashing on roof peak.
Cut some membrane material to seal between the vent flashing and the roof and cut an opening for the vent.
It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
How to install porch roof flashing.
Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane 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.
But it doesn t work that way.
Roof shingle over step flashing.
Then nail the new l shaped flashing under the builder s felt but above the fascia board.
To cover the corner you will need to cut a custom piece of flashing.
If you are using a pre formed flashing you are going to make a cut at 45 degrees in toward the midline.
If siding on.
