Lay the cut flashing down at the corner.
Installing flashing on porch roof.
How to flash a porch addition 1.
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.
If you already have faulty flashing installed you.
Cut an angle with tin snips on one side of the flashing piece from an end.
Especially if you live in an area that gets a lot of snow and ice.
How to install porch roof flashing step 1.
Before you apply the flashing you ll need to lay down a waterproof membrane.
Flash the corner first if applicable.
Measure the length of the porch roof joint to determine how much flashing you will need.
Install the underlayment as directed by the manufacturer then set the valley flashing on top of it.