Nail the flashing securely in place using roofing nails.
Installing flashing on porch roof.
How to install porch roof flashing step 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 flash a porch addition 1.
Before you apply the flashing you ll need to lay down a waterproof membrane.
Prepare the area where you will install the roof flashing.
Put on a pair of leather palm gloves to avoid injuries from the sharp edges of the metal flashing.
Lay the cut flashing down at the corner.
Install the underlayment as directed by the manufacturer then set the valley flashing on top of it.
Cut an angle with tin snips on one side of the flashing piece from an end.
If you already have faulty flashing installed you.
Measure the length of the porch roof joint to determine how much flashing you will need.
For the valley areas of the roof you will be using valley flashing.