How to Build an Insulated Stove Pipe

What You'll Need
26 gauge steel sheet metal
Metal drill bit
Measuring tape
Safety glasses
Fireproof insulation (optional)
Aluminum tape
Power shears
Silicone spray
Metal screws
Electric screwdriver

When someone mentions a stove pipe, most people flash to images of Abraham Lincoln. The famous hat he wore got its name because it resembled a stove pipe that was found in every home. A stove pipe is typically associated with a wood or charcoal burning stove. The stove pipe is connected to the stove and goes through the ceiling or back of the home to redirect smoke outside of the home. Cabins, lodges and period homes still use this type of stove for heat. A major issue with these is a loss of heat or having it misdirected. The following article will show you how to build a stove pipe that is insulated.

Step 1 – Material Selection

Before purchasing your material, measure the circumference of the exhaust leading out of the stove. Also measure the distance from the stove to the outside along the path you want it to travel. Remember that it is also better to have more than less material. Measure the opening of the exhaust in the center and multiply by two to get the width. Add an extra two inches to the number. There are many types of metal you can buy for this project but 26 gauge steel sheet metal is the best choice. This is the material to use because it will not warp from the heat given off by the stove.

Step 2 – Make the Stove Pipe

You may need to build this in sections to make it easier on yourself, but the construction is the same regardless how many pieces you have. Make sure to wear safety glasses and sturdy work gloves. You will be working with very sharp edges. Bend the sheet metal to form a cylinder. Make sure it overlaps the extra distance you added in Step 1. Make a mark along the edge with the marker then release the metal. Use the drill to make holes along this edge. Make a cylinder again, but this time, use the holes to make a mark in the other end of the metal. Drill the holes here as well. Pull the ends together and line up the holes then screw them together. If working in sections, leave the tops clear until you're ready to put them together.

Step 3 - Installing the Stove Pipe

Slide the first section of the stove pipe you connected over the exhaust. Continue stacking and screwing the sections together. If you are working with angles, then you will need to purchase pieces of steel duct that is already angled.

Step 4 - Insulating the Stove Pipe

Steel is fairly good with heat distribution, but the seams are where you will lose most of the heat. Seal each seam in the stove pipe with silicone. Use your finger dipped in hot water to smooth out the silicone so that it is flat. After the silicone has dried, place aluminum tape around the seams.