How To Install Flashing On A Flat Roof

Look for the chimney or any type of pipe coming out of the building.

How to install flashing on a flat roof.

Most flashing is 8 inches wide. Bend the corner flashing tightly around the corner. 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. Install the drip edge by fitting it on the roof eave pushing it tightly against the edge of the plywood and nailing or screwing it down.

Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint. Step 6 make a 10 degree bend on the shingle edge of the flashing approximately 1 2 inch from the edge. When fitting cover flashings to a flat roof like the one pictured bottom right there is no need for the third covering angle of lead the lead is simply cut just above the flat roof to stop capillary action and the flashing cutting into the flat roof itself. Locate all of the areas around the flat roof where water can potentially enter.

Use 1 inch galvanized roofing nails or 3 4 inch exterior screws. Overlap two pieces of flashing that meet end to end by at least 1 inch. Look for any type of vents as well. 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. Use a single piece of flashing in the front and step flashing up the sides of the curb. Step flashing on roof peak. Install sheet metal flashing over a water and ice barrier around the perimeter of the skylight.

Then nail the new l shaped flashing under the builder s felt but above the fascia board. Begin by removing the shingles at the affected area and removing old flashing if present. However the principles are the s. 4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles.

Flat roof flashing is also installed around the perimeter of the roof to protect the underside of shingles. Each flashing job is a little bit different and depends on the type of material that the exterior of your house is made of.