How To Install Flashing On Existing Roof

Cut some membrane material to seal between the vent flashing and the roof and cut an opening for the vent.

How to install flashing on existing roof.

It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. Next place your vent flashing on top of the membrane. Posted march 4 2017 filed under roof installation roof repair maintenance. Measure the length of the porch roof joint to determine how much flashing you will need.

How to install porch roof flashing step 1. Prepare the area where you will install the roof flashing. Then nail the new l shaped flashing under the builder s felt but above the fascia board. The metal flashing must overlap the material not the other way around.

This flashing is typically field fabricated from a sheet of 26 ga. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. If you already have faulty flashing installed you. 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.

Galvanized sheet metal bent at a 90 degree angle i e. But it doesn t work that way. Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane in place. Learn how to install kickout flashing and help control water management from the roof into the gutter with this instructional guide from james hardie.

Once even a small section of roofing cement fails you ll have a leak.