Flashing Around A Rock Chimney On A Metal Roof

It s typically made of thin pieces of impenetrable material which inhibits water leaking around the chimney preserving the building from moisture and mold issues.

Flashing around a rock chimney on a metal roof.

Flashing is a method of weatherproofing the base of a chimney. 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. Slide sidewall flashing into place and fasten into the chimney with masonry anchors. Along the bend at both ends so that the flashing bends around the chimney at the bottom and overlaps at the ridge.

Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in. Pound the flashing into the grooves and fasten with the drive in expanding anchors. The same techniques can be used on any style roof. Chimney boot for a metal roof.

I use the shingle lap method. Comprised of step tins rubber or some other type of membrane. Cut the bottom of the sidewall flashing at 45 degrees and the top such that it will bend around the uphill side of the chimney. And the upper counterflashing.

The first part is a one piece pan that is bent at a right angle and laid with one leg against the chimney and the other on the roof. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Meaning that each layer should lap on top of the lower. Install two layers of butyl tape sealant under perimeter of pan flashing.

Each leg should be about 6 in. On each end of the pan flashing cut about 1 1 2 in. Flashing is often made of metal which is the norm on a metal roof. A typical roof to chimney flashing will consist of two parts.

Repeat sidewall flashing on opposite side of the chimney. This is our sixth video in our series on metal roofing involving chimney flashing.