If you already have faulty flashing installed you.
Installing flashing on porch roof.
Flash the corner first if applicable.
Especially if you live in an area that gets a lot of snow and ice.
Nail the flashing securely in place using roofing nails.
Measure the length of the porch roof joint to determine how much flashing you will need.
Before you apply the flashing you ll need to lay down a waterproof membrane.
How to install porch roof flashing step 1.
Lay the cut flashing down at the corner.
How to flash a porch addition 1.
Cut an angle with tin snips on one side of the flashing piece from an end.
Put on a pair of leather palm gloves to avoid injuries from the sharp edges of the metal flashing.
The flashing on the wall should be flush against it and the porch roof portion should be on top of the shingles.
Install the flashing place the flashing between the joint of the house and the roof.