How to Install a Stainless Steel Chimney

stainless steel chimney on a roof
What You'll Need
Stove pipe
Self Tapping metal screws
Fireproof/high temperature mortar caulk
Caulking gun
Masonry screws
Drywall saw
Reciprocating saw
Safety goggles
Work gloves

Stainless chimneys are designed to handle a wide range of heating appliances, including wood burning stoves and conventional furnaces. Installation of a stainless steel chimney is significantly easier and less expensive than a traditional one, and involves none of the masonry costs associated with brick. Before beginning installation, make sure that you have the proper permits in place to begin. Use products that are fire safe and follow fire safety guidelines. This is an advanced level DIY project and involves roof access; the help of a knowledgeable friend or neighbor is suggested.

Step 1 - Prepare to Install Your Chimney

Before you begin, please note that installation of a stainless steel chimney is a "work through" project; because the chimney type will vary based upon the heating application and connections, the installation of the chimney should be done at the same time as the furnace or wood burning stove installation.

Step 2 - Place the Flue

Ideally, choose a location between the ceiling joists and the rafters. You will need a space a little larger than 12 inches squared for the support bucket. Measure and cut framing members to fit the space you've chosen. Place them around the perimeter of where the flue will go, braced between the joists to add stability. Use a drywall saw to cut the hole in the area marked on the ceiling.

Step 3 - Install Supports

stainless steel chimney on a roof

Lower the support bucket in from above, and have someone else below to hold it in place. Use a few nails to start the bucket, then once you're sure that it's even, fill the rest of the provided nail holes. Install a trim plate on the ceiling by attaching it to the framing with screws.

Step 4 - Install the Flashing

Line up the center of the flue to the roof where the chimney will go by using a level. Drill a small hole in the roof at the center of this mark, to insure the chimney is lined up properly. Using proper safety equipment, go on the roof. Place the chimney flashing center on the hole. Mark the shape of the hole, then use the reciprocating saw to cut through the roof. Install the flashing, using the caulk to make sure the seal is strong and leak-proof. Replace shingles around the flashing.

Step 5 - Install the Chimney

Install the piping from the bottom up, bringing it from the furnace or stove location, up through the support bucket, and finally up through the flashing. Install the chimney top according to the manufacturer's specifications. Don't forget to put a storm collar around the base of the chimney to stabilize it and prevent leaks. Use caulk to seal all of the external connections. Make sure that all connections are tight and solid, and double check them at completion of this project.