How To Install Vent Flashing Flat Roof

Look for any type of vents as well.

How to install vent flashing flat roof.

Add a large bead of caulk in a half moon shape around the flashing and put the shingles back in place. 1 remove nails holding down shingles above the pip. 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. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.

Then nail the new l shaped flashing under the builder s felt but above the fascia board. Pull the old flashing up over the vent pipe and scrape any old caulk and debris off the roof. Bend the corner flashing tightly around the corner. 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. Flat roof flashing is also installed around the perimeter of the roof to protect the underside of shingles. Roof shingle over step flashing. Slide the new flashing over the vent pipe and under the shingles above the pipe.

Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. This can be a source for anything from smoke to steam. Look for the chimney or any type of pipe coming out of the building. Use one roofing nail in each corner of the flashing to secure it to the roof.

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. 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. Slip a flat bar under the edge of the vent flashing and pop the nails up photo 1. 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.

Turn your vent upside down and apply a thick bead of caulk to the flange.