Step flashing is installed where the roof and the side wall meet to defend against water penetration.
Installing l flashing on roof.
Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.
The top piece that bends around the chimney is left unattached.
Step flashing on roof peak.
4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.
Flashing is installed to surround roof features such as vents.
Begin by removing the shingles at the affected area and removing old flashing if present.
Then nail the new l shaped flashing under the builder s felt but above the fascia board.
If you do not wish to form your own corner flashing you can buy pre bent pieces and cut them to size or use a piece of corrugated aluminum which is easier to bend.
Use roofing nails to install the l shaped flashing flush with the roof and wall then cover it with roofing cement and reattach the roofer s felt.
Roof shingle over step flashing.
Completing a professional grade step flashing installation is important.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
Step flashing can be purchase pre molded into the l shape or flat.
Under the base part of the flashing use plastic roofing cement and finish attaching it to the roof with galvanized roofing nails.
This how to video explores proper roof flashing installation for shingle roofing applications.
Bend the corner flashing tightly around the corner.
