What chimney liner means
A chimney liner is the clay tile, cast in place or stainless steel lining inside a chimney flue. It contains heat and gases and protects the masonry.
Also called flue liner.
Where it matters on a chimney job
Cracked clay tiles or a new appliance with different venting needs are the usual reasons to reline. Stainless liners are sized to the appliance, so get the appliance's specs before you quote.
What the model code says
- The chimney wall or flue lining may not change size or shape within 6 inches above or below where it passes through floors, ceilings or roofs. (IRC 2021, Chapter 10)
Check which code edition your building department enforces for chimney liner before you quote.
What it costs
For chimney liner, the closest koira.ai price is the chimney liner installation cost guide, near $2,500 for a typical job and $1,200 to $5,500 for most. The guide shows its sources and what moves the price.
Work it out
- Cost guide: Chimney liner installation cost
- Tools, templates and guides: Free chimney resources
Sources: 2021 International Residential Code, Chapter 10, Chimneys and Fireplaces (ICC). Checked October 9, 2026.