Installing L Flashing On Roof

You continue this process around the length of the chimney cutting each step flashing to fit.

Installing l flashing on roof. Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint. Step flashing on roof peak. 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. Bend the corner flashing tightly around the corner.

Begin by removing the shingles at the affected area and removing old flashing if present. 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. Most flashing is 8 inches wide.

If you purchase the flashing flat you will have to mold each piece yourself. Completing a professional grade step flashing installation is important. Roof shingle over step flashing. Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge.

Under the base part of the flashing use plastic roofing cement and finish attaching it to the roof with galvanized roofing nails. Step flashing is installed where the roof and the side wall meet to defend against water penetration. 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. The top piece that bends around the chimney is left unattached.