Flashing A Stone Chimney On A Metal Roof

Chimney boot for a metal roof.

Flashing a stone chimney on a metal roof.

On each end of the pan flashing cut about 1 1 2 in. Round metal chimneys will be flashed much like pipes. A typical roof to chimney flashing will consist of two parts. The lower step flashing.

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. 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. Along the bend at both ends so that the flashing bends around the chimney at the bottom and overlaps at the ridge. 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.

Bend 1 side of the flashing around 1 edge of the chimney. Flashing is often made of metal which is the norm on a metal roof. Rivet the pan flashing to the sidewall flashing. Pan flashing should extend at least 12 inches up the roof plane.

Install two layers of butyl tape sealant under perimeter of pan flashing. Use tin snips to cut the bent base flashing that you ordered from the sheet metal shop. Let s focus on masonry chimneys since they are the most challenging and one of the most common. 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.

A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Allowing for movement chimneys have a foundation which may be independent from the house. Don t use aluminum flashing for this situation as the masonry will corrode the aluminum. And the upper counterflashing.

Each leg should be about 6 in. Flashing is a method of weatherproofing the base of a chimney. Apply sealant to sidewall flashing where pan flashing tabs will overlap. Cut the base flashing.

Cut and fold pan flashing to fold up the back of the chimney and over the sidewall trim.