How To Flash A Chimney On A Flat Roof

In most cases it is essential to use a skilled craftsman to wrap a layer of the rubber material into a step flashing and then counter flash with aluminum or copper.

How to flash a chimney on a flat roof.

Bend a piece of cap flashing to fit around the top corner of the chimney and add the cap flashing across the back of the chimney. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in. Set the flashing aside.

Fit an 8 inch 20 3 cm piece of square step flashing over the chimney s front corner. Look for the chimney or any type of pipe coming out of the building. Flashing the area of a chimney with a rubber roof system is very tricky. This can be a source for anything from smoke to steam.

Fold closure 90 degrees and. Cut two opposing 45 degree notches into z closure to allow a 90 degree bend. Locate all of the areas around the flat roof where water can potentially enter. Trim panels to fit around the chimney.

Apply butyl tape to the underside of the closure. Bend legs up the chimney sides about 1 inch. Panels above the chimney should be removed. Place the step flashing over the caulk and onto the chimney.

Pound the flashing into the grooves and fasten with the drive in expanding anchors. It is a time consuming process. Flat roof flashing is also installed around the perimeter of the roof to protect the underside of shingles.