What's the best chimney liner for a wood-burning insert — stainless steel or aluminum?
Stainless steel — and for a wood-burning insert it's the only right answer, not a preference. Aluminum liners are a light-duty product for certain gas applications only; they can't take wood-fire temperatures or stand up to creosote. Every wood insert we install gets a correctly sized stainless liner running the full height of the chimney, insulated where conditions call for it.
Why aluminum is off the table for wood
Aluminum liners exist for one job: relining a flue for certain gas appliances with mild flue temperatures. Wood burning is a different world — sustained high heat, and creosote whose acids chew through aluminum. Put aluminum on a wood insert and you get a liner that degrades fast in a place you can't see, venting the one appliance in your house that runs hottest. Stainless steel handles wood-fire temperatures, shrugs off creosote, and is what every wood insert manufacturer's installation requirements point to. This is a spot where there's no honest debate to present — it's stainless.
Correctly sized matters as much as the material
The quiet mistake we find in older Asheville and Hendersonville installs isn't aluminum — it's an insert dumped into the original oversized masonry flue with no liner at all, or a stub that ends just above the damper. An insert's draft is engineered around its flue collar; exhaust into a cavernous old flue and it slows, cools, and rains creosote onto the smoke shelf. A full-height stainless liner matched to the collar keeps the flue gases hot and moving, which means stronger draft, cleaner burns, and a chimney your sweep can actually clean. That matters extra here — draft is already harder at our elevation, so don't give any away.
One crew, one accountable job
When we install a wood insert, the liner isn't an add-on — it's part of the job, along with the block-off, the connections, and the permit. We pull the permit with your county — Buncombe, Henderson, Haywood, or Transylvania — and meet the inspector, because unpermitted hearth work can haunt a home sale and your insurance. If you're not sure what's up your chimney now, start with an inspection. Call (828) 545-0525.
Related questions
- Who makes the best wood-burning fireplace insert?
- What is the most efficient wood-burning fireplace insert?
- Which wood-burning insert puts out the most heat?
- Which firewood produces the least creosote?
- What's the best way to get more heat out of an existing wood-burning fireplace?
- What is the best gas fireplace brand?
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