How To Install A Metal Roof Flashing Around A Chimney

Fasten cleat with pancake head screws.

How to install a metal roof flashing around a chimney.

To help you install chimney flashing on a metal roof here are some tips for you. Place a second piece of 8 inch 20 3 cm flashing against the chimney. Square step flashing to fit 1 1 2 in. On each end of the pan flashing cut about 1 1 2 in.

Hammer 2 roofing nails into the flashing and roof. Secure a shingle over the corner flashing using a hammer and roofing nail. Slide the rubber boot over the pipe to check the fit. Snip and bend a piece of prebent 8 in.

Step flashing on roof peak. Apply a jelly bean size dollop of caulk at the corner where the chimney meets the roof. The flashing should partially overlap the shingle that covers the first piece of flashing. Secure a shingle over the second piece of flashing with a nail.

Trim the flashing in the center of the rubber boot with a roofing knife so it fits snugly around the pipe. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit. Trace the outline of the base of the rubber boot onto the metal roof with a pencil. Apply butyl tape sealant to the bottom of an offset cleat and install the cleat six inches above the chimney base.

Bend the corner flashing tightly around the corner. Pan flashing should extend at least 12 inches up the roof plane. If you do not wish to form your own corner flashing you can buy pre bent pieces and cut them to size or use a piece of corrugated aluminum which is easier to bend. Roof shingle over step flashing.

Screw the pan flashing to the roof with gasket screws. Embed the corner step flashing in the caulk and nail it to the roof with two roofing nails. Cut and fold pan flashing to fold up the back of the chimney and over the sidewall trim. Rivet the pan flashing to the sidewall flashing.

Remove the rubber boot. Installing chimney flashing on a metal roof is a laborious business but if you love to work with your hands and you want to save some money on professional fees you may want to try doing this carpentry job on your own.