How To Flash A Metal Roof 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.

How to flash a metal roof chimney.

Trace the outline of the base of the rubber boot onto the metal roof with a pencil. When installing a chimney for a wood stove on a metal roof you ll first need to assess the position. It is a time consuming process. Place a small drop of caulk where the roof and chimney meet at the chimney corner.

Hammer 2 roofing nails into the flashing and 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. First fasten the lower sheet of roofing in place alongside the chimney then install the base flashings at the bottom and sides of the chimney. Remove the rubber boot.

Trim the flashing in the center of the rubber boot with a roofing knife so it fits snugly around the pipe. As the side base flashing approaches the valley flashing it will have to be shaped to lie in the lower trough section of the roofing so that the second sheet of roofing will lie flat. Flashing the area of a chimney with a rubber roof system is very tricky. Apply sealant to sidewall flashing where pan flashing tabs will overlap.

Rivet the pan flashing to the sidewall flashing. Set the flashing aside. Drill a small hole in this spot to mark the chimney s center. Pan flashing should extend at least 12 inches up the roof plane.

Install two layers of butyl tape sealant under perimeter of pan flashing. Place the step flashing over the caulk and onto the chimney. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Pound the flashing into the grooves and fasten with the drive in expanding anchors.

Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in. Fit an 8 inch 20 3 cm piece of square step flashing over the chimney s front corner.