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