Nail the flashing securely in place using roofing nails.
Installing flashing on porch roof.
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.
For the valley areas of the roof you will be using valley flashing.
Cut an angle with tin snips on one side of the flashing piece from an end.
Flash the corner first if applicable.
Especially if you live in an area that gets a lot of snow and ice.
Install the underlayment as directed by the manufacturer then set the valley flashing on top of it.
Measure the length of the porch roof joint to determine how much flashing you will need.
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.
Install the flashing place the flashing between the joint of the house and the roof.
How to flash a porch addition 1.