Under the base part of the flashing use plastic roofing cement and finish attaching it to the roof with galvanized roofing nails.
How to lnstall one peice roof flashing.
Make corner flashing from step flashing.
The roof deck flange of step flashings are to be fastened to the surface of each shingle in a position whereby the next course of shingles will cover up hide the flashing from view.
Proper installation of step flashing.
The top piece that bends around the chimney is left unattached.
Once you ve shingled up to the sidewall cut a piece of step flashing at a 45ยบ angle from the outside corner to the bent seam.
Bend it down and back to sit flat on the corner.
But it doesn t work that way.
Momentarily lift the boot and apply sealant to hold the flashing in place.
Place the flashing or boot onto the plumbing vent so the base is resting on shingles.
Install 6 in wide strips of a self sticking waterproof underlayment.
Install shingles as normal up to the base of the plumbing vent.
4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
You continue this process around the length of the chimney cutting each step flashing to fit.
If you have to replace shingles around a skylight examine the old flashing.
One common method is to lay the edge metal under the eaves membrane and over the rake.
Most flashing is 8 inches wide.
Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.
Here is how you do it.
Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.
Once even a small section of roofing cement fails you ll have a leak.
Step flashings are to be installed one per course.
This underlayment will direct any water that may get through the metal flashing onto the roofing felt.
Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.
Installing a roof plumbing vent is typically an easier task than flashing a chimney.