How To Install L Flashing On A Roof

How to install porch roof flashing.

How to install l flashing on a roof. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. Prepare the area where you will install the roof flashing. 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.

To cover the corner you will need to cut a custom piece of flashing. But it doesn t work that way. It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane in place.

If siding on. Roof shingle over step flashing. The first piece of step flashing should overlay the last row of shingles. Next place your vent flashing on top of the membrane.

Once the cut is made you will set the flashing on the corner and nail it in place. Step flashing on roof peak. Bend the corner flashing tightly around the corner. 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.

Once even a small section of roofing cement fails you ll have a leak. Cut some membrane material to seal between the vent flashing and the roof and cut an opening for the vent. Measure the length of the porch roof joint to determine how much flashing you will need. If you are using a pre formed flashing you are going to make a cut at 45 degrees in toward the midline.