How To Install Vent Flashing Flat Roof

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.

How to install vent flashing flat roof.

Slip a flat bar under the edge of the vent flashing and pop the nails up photo 1. Slide the top and sides of your vent underneath the surrounding shingles and leave the bottom side of the vent exposed and laying over the shingles. Now that the old flashing is gone you can slide the new flashing over the pipe vent and maneuver it under the shingles above the pipe. Look for the chimney or any type of pipe coming out of the building.

Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof. Locate all of the areas around the flat roof where water can potentially enter. 1 remove nails holding down shingles above the pip. Look for any type of vents as well.

Roof shingle over step flashing. Begin by removing the shingles at the affected area and removing old flashing if present. Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place. Bend the corner flashing tightly around the corner.

Most metal shingles will be attached to the roof using metal shingle. Flat roof flashing is also installed around the perimeter of the roof to protect the underside of shingles. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. 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.

Slide the new flashing over the vent pipe and under the shingles above the pipe. Turn your vent upside down and apply a thick bead of caulk to the flange. Step flashing on roof peak. Then nail the new l shaped flashing under the builder s felt but above the fascia board.

Next hammer in a nail every few inches to secure the vent to your roofing structure.