How To Flash A Metal Roof Chimney

Pan flashing should extend at least 12 inches up the roof plane.

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. Place the chimney where it would be related to the stove and mark the center of the chimney on the ceiling. 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. Rivet the pan flashing to the sidewall flashing.

Drill a small hole in this spot to mark the chimney s center. Hammer 2 roofing nails into the flashing and roof. Slide the rubber boot over the pipe to check the fit. Cut and fold pan flashing to fold up the back of the chimney and over the sidewall trim.

A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in. It is a time consuming process. Fit an 8 inch 20 3 cm piece of square step flashing over the chimney s front corner.

Trace the outline of the base of the rubber boot onto the metal roof with a pencil. Set the flashing aside. Apply sealant to sidewall flashing where pan flashing tabs will overlap. 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.

Remove the rubber boot. Flashing the area of a chimney with a rubber roof system is very tricky. Pound the flashing into the grooves and fasten with the drive in expanding anchors. Install two layers of butyl tape sealant under perimeter of pan flashing.

When installing a chimney for a wood stove on a metal roof you ll first need to assess the position. Place a small drop of caulk where the roof and chimney meet at the chimney corner.