Stove Pipe Through the Roof: Complete Wood Stove Kits

A through-the-roof chimney system follows a straightforward vertical path from the stove to the roof exit. Here’s an overview of how the system is structured and where the transition to class A insulated chimney pipe takes place:

1. The black stove pipe starts in the room and connects your stove to the support box.

2. At the ceiling level, the system transitions to class A insulated chimney pipe.

3. The insulated chimney then continues safely through the roof using the correct flashing and support components.

The flashing itself is chosen by the pitch of your roof, not by the pipe. Our guide on how the roof flashing and storm collar work shows how to measure that and what each part at the penetration does.

4. The chimney must finish at the proper height above the roof for safe draft and code compliance.

For step-by-step guidance, check our wood stove chimney pipe installation resources.

Quick tips before you order a through-the-roof chimney kit

1. Confirm your setup type, making sure your installation is truly a cathedral-ceiling or no-attic setup, since this directly affects the components required.

Wondering what a new chimney installation involves? The full guide sets out every step and part.

2. Do not confuse a black stove pipe with a class A chimney pipe. A stove pipe stays inside the room, while the insulated chimney system begins where the pipe passes through the ceiling.

3. Verify your measurements, checking the stove collar size, total chimney height, roof pitch, and the amount of chimney needed above the roofline before ordering.

4. Review roof flashing requirements, because using the wrong flashing for your roof pitch can lead to fit and weather-sealing issues.

Why roof and cathedral ceiling penetrations require a class A insulated chimney pipe

Any part of the chimney system that passes through a ceiling or roof must use a class A insulated chimney pipe, not a regular stove pipe.

• A black wood stove pipe is used only inside the room to connect the stove to the support box, and must not pass through combustible construction.
• A class A chimney pipe is the insulated system designed for roof and cathedral ceiling penetrations. It’s built to handle high temperatures while maintaining the required clearances from nearby materials.

In most through-the-roof installations, keep at least 2 inches of clearance between the chimney pipe and combustibles to protect the surrounding structure.

Our through-the-roof kits use UL103HT insulated chimney systems from the point where the vent leaves the room. UL103HT is the U.S. safety standard for high-temperature chimney systems used with wood stoves, meaning the pipe has been tested for the demanding heat levels produced during wood-burning operation.

This insulated design:

• Helps protect the surrounding structure
• Supports code compliance
• Improves long-term safety and performance in homes, cabins, and other spaces where the chimney runs vertically through the roof

Running the chimney through a metal roof

A metal roof changes one thing about the install: the sealing. The pipe itself does not change. From the ceiling up you still need UL 103 HT-listed Class A insulated chimney pipe, because that is the only pipe rated to pass through a combustible roof structure. What a standing-seam or corrugated steel panel demands is a flashing that matches the panel profile and the pitch, plus a watertight collar, so you never get a leak at the one spot water loves to find.

Match the flashing to your roof pitch

Metal roofs come in a range of pitches and the flashing has to match the angle so it sits flat and sheds water. We stock three pitch bands: a flat roof flashing for low and flat roofs, starting at $240 in 6 inch diameter, a 1/12 to 6/12 pitch flashing for standard roofs, and a 7/12 to 12/12 pitch flashing for steep roofs. The wizard above picks the right one once you tell it your pitch.

On a ribbed or standing-seam panel, set the flashing base over the penetration, bed it in a high-temperature roofing sealant along the uphill and side edges, and fasten with gasketed screws. Leave the downhill edge to lap over the panel so water runs off the roof rather than under it.

Seal the top with a storm collar

Above the flashing cone, a storm collar clamps around the pipe and is sealed with a bead of high-temperature silicone. This is the part that stops rain tracking down the outside of the pipe and into the flashing. It is a small component that does a big job, and it is included in the matched kit so you are not left improvising on the roof.

Not sure which flashing your roof needs? Call our US team on 888-834-0880, or use our free flue-design service and we will spec the exact kit for your pitch and ceiling height.

Do you already have a masonry chimney?

If your stove is going into a masonry chimney that is already standing, this is not the kit you need. An existing masonry flue takes a stainless steel liner instead, sized to the stove.

You will find those on our stainless steel chimney liner kits page. A wood stove chimney kit through the roof is a different job: it builds a completely new insulated chimney from the stove up through the roof, for a house with no chimney where the stove is going, or with one in the wrong place for it.

Have the existing flue looked at before you order either one. Its condition, its shape and the narrowest point in it decide whether a liner will pass and which diameter fits, and that is a reading of your own chimney rather than something a kit page can settle for you.

If the stove is not going at the masonry chimney at all, the through the roof chimney kit is your route, and the builder above configures it for your ceiling and your roof.

Can you mix parts from different chimney systems?

No. Build the whole chimney from one matched system, from the stove to the cap. Every wood stove chimney kit on this page is supplied that way.

It matters because the clearance each part holds, the way its joints lock and how often the run has to be supported all come from that system's own listing and from the installation instructions supplied with it. Put a length from a second system into the same run and no single set of instructions covers it, so nothing tells you what the finished chimney is rated for.

It also matters for your cover. Our Limited Lifetime Warranty replaces defective components at 100% of the original purchase price for the first 15 years; after that, replacements are at 50% of the original price, for as long as the original owner owns the system. Its conditions include installing the system in accordance with the instructions supplied with it, whether you install it yourself or hire a contractor. The warranty page sets out the rest, and what the warranty does not cover.

If you are adding to a chimney that is already up, work out which system is up there first, because the new length has to come from the same one.

How much does a wood stove chimney cost?

It depends on how much chimney your route needs, and every part is priced on its own.

Class A insulated chimney sections on our Class A chimney pipe range run from $73 for a 6 inch diameter section, 6 inches long, to $277 for an 8 inch diameter section, 48 inches long, at October 2026 prices. Your stove collar decides between the 6 and 8 inch diameters.

A complete run through the roof takes more than the insulated sections, and our wood stove pipe kits through the roof bring these parts together with them:

• a ceiling support box, which carries the weight of the chimney
• the roof flashing and storm collar that match your roof pitch
• a chimney cap with a spark screen
• the stove pipe that connects the stove inside the room
• the adapter from the stove to the stove pipe, and the adapter from the stove pipe to the Class A pipe

The kit builder above shows the price of your exact configuration once you have set the diameter, the ceiling height and the roof pitch. For how a kit you fit yourself compares with paying for a professional installation, our chimney installation cost guide sets the two side by side.

Frequently asked questions about our wood stove pipe kits through the roof

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