Flashing A Stone Chimney On A Metal Roof

And the upper counterflashing.

Flashing a stone chimney on a metal roof.

A typical roof to chimney flashing will consist of two parts. The lower step flashing. Chimney boot for a metal roof. 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.

For a better connection hem the end of the metal being inserted into the stone and tap in small v shaped pieces of metal to open the hem and wedge both sides of the hem to the reglet. Rivet the pan flashing to the sidewall flashing. Use tin snips to cut the bent base flashing that you ordered from the sheet metal shop. Cut the base flashing.

Comprised of step tins rubber or some other type of membrane. Cut the flashing to fit along the chimney s front. Apply sealant to sidewall flashing where pan flashing tabs will overlap. Allowing for movement chimneys have a foundation which may be independent from the house.

Cut and fold pan flashing to fold up the back of the chimney and over the sidewall trim. Round metal chimneys will be flashed much like pipes. 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.

Pan flashing should extend at least 12 inches up the roof plane. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Let s focus on masonry chimneys since they are the most challenging and one of the most common. Each leg should be about 6 in.

Don t use aluminum flashing for this situation as the masonry will corrode the aluminum. 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. Install two layers of butyl tape sealant under perimeter of pan flashing. Along the bend at both ends so that the flashing bends around the chimney at the bottom and overlaps at the ridge.

Bend 1 side of the flashing around 1 edge of the chimney.