It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing.
How to install l flashing on a roof.
Measure the length of the porch roof joint to determine how much flashing you will need.
Once even a small section of roofing cement fails you ll have a leak.
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.
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.
If you are using a pre formed flashing you are going to make a cut at 45 degrees in toward the midline.
The first piece of step flashing should overlay the last row of shingles.
Once the cut is made you will set the flashing on the corner and nail it in place.
Next place your vent flashing on top of the membrane.
If you already have faulty flashing installed you must remove it.
Roof shingle over step flashing.
How to install porch roof flashing.
The metal flashing must overlap the material not the other way around.
Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane in place.
To cover the corner you will need to cut a custom piece of flashing.
Step flashing on roof peak.
Prepare the area where you will install the roof flashing.
Bend the corner flashing tightly around the corner.
Begin by removing the shingles at the affected area and removing old flashing if present.
Then nail the new l shaped flashing under the builder s felt but above the fascia board.
If siding on.
