Yes, a wood stove works in a pole barn, and the chimney leaves through the metal roof or the sidewall. Straight up through the roof is usually simpler and draws better; the wall route suits a stove set against a sidewall.
Whatever the stove, the pipe changes to insulated Class A chimney pipe where it leaves the room. Stove pipe never passes through a roof, wall or ceiling.
Roof or Wall: Which Route Suits a Pole Barn?
Choose the roof when the stove can stand under open roof framing, and the wall when it has to stand against a sidewall. The two routes differ in these ways:
| Question | Through the Metal Roof | Through the Sidewall |
|---|---|---|
| Where the pipe leaves | Through the roof panel, between purlins | Out through the siding, between girts or beside a post |
| Parts at the building | A roof support box, a flashing matched to the roof pitch, and a storm collar | A wall thimble, a tee with a clean-out cap, a base wall support and wall brackets |
| Draft | Stronger, with one straight vertical run | Slightly weaker, because the tee adds a turn |
| Height to reach | Measured from where the pipe leaves the roof | The whole sidewall, then enough to clear the roof |
| Cleaning | From the roof, or with the cap removed | Through the clean-out cap at the tee |
What Is Your Pole Barn Built From?
A pole barn is a wood frame under a steel skin, and the wood frame is what every clearance is measured to. Posts stand in the ground, girts run across them to carry the siding, and purlins run across the trusses to carry the roof.
The steel sheet does not burn, but the posts, girts, purlins and trusses usually do. Treat any insulation, vapor barrier or lining board under the steel as combustible unless its maker says otherwise.
A metal building with steel purlins and girts is a different case. The frame will not burn, but its insulation and facing may still sit inside the clearance zone.
Through the Metal Roof on Purlins
On the roof route, black stove pipe rises from the stove to a roof support box. Insulated Class A pipe carries on through the roof and above it.
A barn open to its rafters has no ceiling to cross. That is the case our through-the-roof complete chimney pipe kit is built for: open, vaulted or cathedral ceilings with no attic.
- Check the purlin gap first. The support box has to sit between two purlins, so measure the gap before you order.
- Frame around a purlin in the way. Keep every piece of wood at least 2 inches from the Class A pipe, the clearance the system's installation instructions give.
- Match the flashing to the pitch. The kit builder asks for your roof pitch and picks the flashing band from it, and the storm collar above the flashing seals the pipe.
- Check the stove pipe rise. The builder offers 41 to 129 inches of stove pipe between the stove and the support box. For a taller roof, ask us before you order.
How to bed a flashing on ribbed or standing seam steel is in our guide to a wood stove chimney through metal roof. For a small building with a ceiling, the same route is taken step by step for a Class A chimney kit in a shed.
Through Metal Siding on Girts
On the wall route, the stove pipe stops short of the wall and Class A pipe passes through a wall thimble to a tee outside. From the tee, the chimney climbs the barn wall to a cap.
- In the kit builder, choose a combustible wall. A wall with wood girts or posts counts as combustible, even with steel on the outside.
- Measure the wall from the finished inside surface to the finished outside surface. The builder takes walls of 4 to 10 inches; the standard thimble fits walls of about 6 to 10 inches. For a thinner wall, the sleeves can be shortened; for a thicker wall, they can be extended.
- Keep single-wall stove pipe at least 18 inches from the wall (IRC Table M1803.3.4), and make the change to Class A before that zone.
- Fix the base wall support, which carries the chimney's weight, and the wall brackets into a post or girt, not the sheet alone.
The builder on our wood stove wall pass through kit page allows for the wall thickness and both clearances. The same route in a stud-framed building is covered in our guide to a through-the-wall chimney in a garage.
How High Above the Roof in a Tall Building?
Under the chimney's installation instructions, which quote NFPA 211, a pole barn chimney ends at least 3 feet above the highest point where it passes through the roof. It also stands 2 feet higher than any part of any building within 10 feet horizontally, the barn itself or a neighboring one.
That is the 3-2-10 rule.
Here is the arithmetic on a low 4/12 steel roof, using our kit builders' method. Say the chimney leaves the roof 10 feet or more from the ridge, measured level. The roof rises 4 inches per foot, so 4 times 10 is 40 inches, plus 24 makes 64 inches above the roof.
Closer to the ridge the figure drops, but never below 3 feet.
On the wall route, a tall sidewall makes a long outside run. The chimney's installation instructions set the support that run needs:
- Wall brackets sit no more than 8 feet apart; up to 5 feet above the top one, nothing more is needed.
- From 5 to 10 feet above it, one extended roof brace is added.
- Past 10 feet, or over 5 feet above the brace, an engineered support is needed, so ask us first.
More worked examples are in our chimney height rule guide.
Clearances to Posts, Purlins, Girts and Stored Material
In a pole barn, clearance is measured to the wood frame and to whatever is stored around the stove.
| What | Clearance to Combustibles | Where It Comes From |
|---|---|---|
| Class A chimney pipe | 2 inches | The installation instructions supplied with the system |
| Single-wall stove pipe | 18 inches | IRC Table M1803.3.4 |
| The stove itself | As its label and manual state | The stove's own listing |
Per IRC Table M1803.3.4, single-wall stove pipe (the connector pipe inside the room between the appliance and the Class A chimney) must maintain at least 18 inches of clearance from any combustible wall, ceiling, or framing.
In a barn, that means the face of a wood post, the underside of a truss and the girts along the wall.
A poured concrete knee wall is a different case. Clearance is measured to combustible material, so a genuinely non-combustible wall, such as poured concrete, concrete block or solid masonry, needs no clearance, though direct metal-to-metal contact should still be avoided.
Brick or stone applied over a wood-framed wall does not count as non-combustible: it conducts heat through to the framing behind it, so the 18 inches is measured to that framing rather than to the face of the brick.
Stored material counts too. Keep hay, straw, lumber, cardboard and firewood out of every clearance zone, and never park a machine against the pipe.
Where Can the Stove Go, and What Goes Under It?
Before putting a wood stove in a pole barn, pick the spot where the chimney gets the straightest path out. For the roof route, that is under open roof framing, clear of the trusses. For the wall route, it is close to a sidewall.
A concrete slab is non-combustible, but the stove's manual still sets the floor protection it wants in front of and around the stove. On a wood floor or a loft, fit the floor protector that the manual specifies, at the size it gives.
Why Insulated Class A Matters in a Cold Barn
An uninsulated barn is cold, and cold pipe cools the smoke inside it, which weakens draft and lets creosote form. Insulated Class A keeps the flue gas warm, which steadies the draft and helps reduce creosote buildup.
Our Class A flue pipe is two walls of 304 stainless steel with ceramic fiber insulation between them. It is rated for 1000 degrees F (538 degrees C) continuous use, in 6 and 8 inch. Its stainless walls resist moisture damage in cold climates, where condensation forms more easily.
In a tall barn the stove pipe run is long. Double-wall stove pipe keeps the flue gas warmer than single-wall, for better draft and less creosote.
Installing a Wood Stove in a Shop: Air Supply and Safety
A pole barn that doubles as a shop needs these habits.
- Sweep sawdust and shavings away from the stove, and keep them off its top.
- Store gasoline, solvents and paint well away from the stove, and never refuel a machine near it while it burns.
- Fit a smoke alarm and a carbon monoxide alarm in the barn. If the carbon monoxide alarm sounds, get everyone outside and call 911.
- Give the fire air. A barn with sealed, insulated walls may need a window cracked open, or the outside air connection the stove's manual describes.
Is a Wood Stove Allowed in Your Pole Barn?
Whether a wood burning stove in a pole barn is allowed is your local building department's call, because there is no national US building code. Each state or city adopts its own.
Where the International Residential Code applies, section R1005.1 reads: "Factory-built chimneys shall be listed and labeled and shall be installed and terminated in accordance with the manufacturer's installation instructions." NFPA 211 is the national fire standard for chimney clearances and height, so ask the office whether it applies in your area.
Before you cut a hole, expect the office to ask about:
- How it classifies the barn: farm building, accessory building or shop.
- Whether you need a permit, and when the inspection happens.
- The stove's listing label and its manual.
- The chimney's listing and the installation instructions supplied with it.
- Clearances, floor protection and the height above the roof.
- Whether vehicles or fuel share the building: local codes and inspectors may restrict solid-fuel appliances in garages.
Tell your insurer about a wood stove in a pole barn before you install, and ask whether they want an inspection.
Which Kit Fits Your Barn?
Open framing takes the roof kit, a flat ceiling the garage or attic kit, and a sidewall a wall kit.
| Your Barn | The Kit |
|---|---|
| Open to the roof framing, no ceiling above the stove | Open-ceiling chimney kit through the roof |
| A flat ceiling with truss or attic space above the stove | Garage through the roof chimney kit, or our insulated chimney pipe kit through the attic; both add an attic insulation shield |
| Stove at a sidewall, under 14.2 feet of outside pipe | Garage kit for chimney pipe through the wall |
| Stove at a sidewall, 14.2 to 25.9 feet of outside pipe | Our through-the-wall exterior chimney pipe kit |
A barn that fits none of these, or more than 25.9 feet of pipe outside, is a job for our free flue design service. Pick the drawing closest to your barn, fill in your measurements, and we send back a chimney configuration that fits.
Need More Information?
Clearances and pipe temperatures, including how hot a chimney pipe gets, are answered in our FAQ.
Each route is taken step by step in our installation guides for every route. And if you would rather have someone look at your barn with you, ask our chimney specialists or call 888-834-0880.
