Installation of a Chimney Pipe on a Metal Roof

Review the manufacturer guidelines for your particular chimney pipe. It should outline clearance requirements for the pipe when passing through combustible materials. Determine if your flue size is adequate for the stove. It should be at least 25 percent larger than the stove piping.

Measure the diameter of your chimney flue. Add two inches if it passing through combustible material, such as sheathing plywood. This is the size of the hole you will cut in the roof.

Mark the location for the chimney on your roof. Drill a starter hole and use a jigsaw to cut a hole based on the measurements you've made.

Run the chimney pipe through the roof until it extends at least three feet above the surrounding roof line. Install remaining chimney pipe sections. If running the chimney through floors, you will need to install fire stop radiation shields at each story. If the pipe passes through living quarters, you must enclose it in a chase in those areas.

Cut an opening in the cone of the flexible roof flashing, based on the size of your chimney flue's diameter, using metal snips. Slide the flashing over the pipe, using water to lubricate it.

Apply silicone sealant around the base of the flashing. Press the flashing down so it is flush with the texture of the roof. If it is corrugated, make sure the base conforms and is as flush as possible. The base of the flashing should be flexible enough to make this possible. Secure with self-tapping screws.

Install a storm collar around the topmost section of chimney and secure with bolts.

Place a chimney cap on the top of the chimney and secure as directed, using screws or builder's adhesive.

Install a ceiling support box at the first floor where you will transition from stove piping to chimney piping. Follow manufacturer instructions for the installation. Allow the ceiling support to hang down two inches from the ceiling. Extend the chimney pipe sections so they hang four inches below the box. Mount a stove pipe adapter to the exposed pipe.

Attach stove pipe sections to the flue collar of the stove, securing with metal screws or according to the manufacturer's guidelines. Connect the sections to the stove pipe adapter.