How To Install Vent Flashing Flat Roof

Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof.

How to install vent flashing flat roof.

Turn your vent upside down and apply a thick bead of caulk to the flange. Slide the new flashing over the vent pipe and under the shingles above the pipe. Look for the chimney or any type of pipe coming out of the building. Bend the corner flashing tightly around the corner.

Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place. Next hammer in a nail every few inches to secure the vent to your roofing structure. Begin by removing the shingles at the affected area and removing old flashing if present. Locate all of the areas around the flat roof where water can potentially enter.

Most metal shingles will be attached to the roof using metal shingle. Step flashing on roof peak. This can be a source for anything from smoke to steam. Roof shingle over step flashing.

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. Flat roof flashing is also installed around the perimeter of the roof to protect the underside of shingles. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Then nail the new l shaped flashing under the builder s felt but above the fascia board.

Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. Look for any type of vents as well. Slip a flat bar under the edge of the vent flashing and pop the nails up photo 1. 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 one roofing nail in each corner of the flashing to secure it to the roof.