Short answer: run UL 103 HT-listed Class A insulated chimney pipe through the metal roof, seal the penetration with a pitched roof flashing sized to your roof angle, and lock it down with a storm collar and high-temperature sealant. A single matched kit gives you every part that fits together.
A metal panel changes how the base is bedded and fastened, but not which part you need. That is set by pitch, and it is covered in chimney roof flashing and storm collar.
A metal roof changes one thing about a wood stove install: the sealing. The pipe you run through it does not change. You still need insulated Class A chimney pipe from the ceiling up, because that is the only pipe rated to pass through a combustible roof structure safely. What a standing-seam or corrugated steel roof demands is a flashing that matches the panel profile and pitch, plus a watertight collar, so you never get a leak at the one spot water loves to find.
Use Class A insulated pipe through the roof, nothing thinner
Single-wall and black double-wall stove pipe are connector pipe. They stay inside the room, between the stove and the ceiling. The moment your flue passes through the roof deck, it has to be Class A insulated chimney pipe.
Class A insulated chimney pipe, when UL 103 HT-listed for wood-burning, maintains a minimum of 2 inches clearance to combustibles per the standard listing. Always verify the exact clearance specified by the manufacturer's UL listing for the specific product. Our Class A pipe carries a 304 stainless inner and outer wall with a 1.18 inch ceramic-fiber core, so the outer surface stays cool enough to sit within that 2 inch clearance to your rafters and decking.
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 so you can pick the one that fits:
- Low and flat roofs: a flat roof flashing (from $240 for 6 inch).
- Standard pitches (1/12 to 6/12): the 1/12 to 6/12 pitch flashing.
- Steep pitches (7/12 to 12/12): the 7/12 to 12/12 pitch flashing.
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, not under.
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 part that does a big job, and it is included in the matched kit so you are not left improvising.
What is in the complete kit
Rather than buying parts loose and hoping they fit, a through-the-roof kit gives you the matched set: the Class A pipe lengths, a ceiling support box or roof support, the pitched flashing, the storm collar, and a rain cap. Every clamp and joint assumes the rest of the system is from the same catalog, which removes the field-engineering risk of mixing brands. Our systems are engineered as one certified assembly and are not designed to mix with other manufacturers' sections.
Not sure which parts your roof needs? Use our free flue-design service and we will spec the exact kit for your pitch and ceiling height.
Clear the roofline by the required height
Once the pipe is through, it has to finish tall enough above the roof for a safe, drawing chimney. The required height depends on where the pipe exits and what is nearby, so size the top sections to your roof before you order. Our chimney height guide walks through the exact figures for common roofs.
DIY or hire a pro
A metal-roof penetration is well within reach for a confident DIY installer, and a matched kit makes it a parts-list job rather than a design job. If you would rather not be on the roof, a licensed chimney contractor or a CSIA or NFI certified installer can handle it. The warranty requires only that the system is installed according to the supplied instructions, whether you do the work or a contractor does. Either way, call our US team on 888-834-0880 if you want a second set of eyes on your plan.
Need More Information?
- Chimney and stove pipe FAQ for clearances, temperatures and codes.
- Wood stove pipe installation guides for step-by-step help.
- Talk to our US technical team about your own layout.
