Step flashing is installed where the roof and the side wall meet to defend against water penetration.
Installing l flashing on roof.
Begin by removing the shingles at the affected area and removing old flashing if present.
Most flashing is 8 inches wide.
Completing a professional grade step flashing installation is important.
Roof shingle over step flashing.
Under the base part of the flashing use plastic roofing cement and finish attaching it to the roof with galvanized roofing nails.
Flashing is installed to surround roof features such as vents.
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.
If you purchase the flashing flat you will have to mold each piece yourself.
The top piece that bends around the chimney is left unattached.
Step flashing can be purchase pre molded into the l shape or flat.
This how to video explores proper roof flashing installation for shingle roofing applications.
Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.
Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.
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.
Bend the corner flashing tightly around the corner.
You continue this process around the length of the chimney cutting each step flashing to fit.
