Flashing Around A Rock Chimney On A Metal Roof

The same techniques can be used on any style roof.

Flashing around a rock chimney on a metal 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. 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. And the upper counterflashing. Chimney boot for a metal roof.

Slide sidewall flashing into place and fasten into the chimney with masonry anchors. 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 piece of metal that is sealed to the chimney surface and covering the top of the step flashing to form a water tight barrier by directing water over and away from the step flashing. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.

Repeat sidewall flashing on opposite side of the chimney. 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. Install two layers of butyl tape sealant under perimeter of pan flashing. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit.

This is our sixth video in our series on metal roofing involving chimney flashing. A typical roof to chimney flashing will consist of two parts. Along the bend at both ends so that the flashing bends around the chimney at the bottom and overlaps at the ridge. Pound the flashing into the grooves and fasten with the drive in expanding anchors.

On each end of the pan flashing cut about 1 1 2 in. I use the shingle lap method. Flashing is a method of weatherproofing the base of a chimney. Meaning that each layer should lap on top of the lower.

The lower step flashing. Flashing is often made of metal which is the norm on a metal roof.