Measure the length of the porch roof joint to determine how much flashing you will need.
Installing flashing on porch roof.
For the valley areas of the roof you will be using valley flashing.
Nail the flashing securely in place using roofing nails.
Before you apply the flashing you ll need to lay down a waterproof membrane.
Flash the corner first if applicable.
Install the flashing place the flashing between the joint of the house and the roof.
Prepare the area where you will install the roof flashing.
How to flash a porch addition 1.
The flashing on the wall should be flush against it and the porch roof portion should be on top of the shingles.
How to install porch roof flashing step 1.
Cut an angle with tin snips on one side of the flashing piece from an end.
Install the underlayment as directed by the manufacturer then set the valley flashing on top of it.
If you already have faulty flashing installed you.