How To Flash A Metal Roof Chimney

Place a small drop of caulk where the roof and chimney meet at the chimney corner.

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. 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. 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.

Hammer 2 roofing nails into the flashing and roof. When installing a chimney for a wood stove on a metal roof you ll first need to assess the position. Pound the flashing into the grooves and fasten with the drive in expanding anchors. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit.

Install two layers of butyl tape sealant under perimeter of pan flashing. 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. Slide the rubber boot over the pipe to check the fit.

Set the flashing aside. Place the chimney where it would be related to the stove and mark the center of the chimney on the ceiling. Trim the flashing in the center of the rubber boot with a roofing knife so it fits snugly around the pipe. Remove the rubber boot.

Flashing the area of a chimney with a rubber roof system is very tricky. Cut and fold pan flashing to fold up the back of the chimney and over the sidewall trim. Trace the outline of the base of the rubber boot onto the metal roof with a pencil. Rivet the pan flashing to the sidewall flashing.

It is a time consuming process. Apply sealant to sidewall flashing where pan flashing tabs will overlap.