What Is a Flue Liner and Why Does It Matter?
Your flue liner is the inner lining of your chimney that contains combustion gases, protects your home from heat transfer, and directs smoke safely out of your house. Think of it as the most important part of your chimney that you never see.
Without a functioning liner, heat from your fireplace can reach combustible materials in your walls — wood framing, insulation, and drywall — creating a serious fire risk. Carbon monoxide can also seep through deteriorated mortar joints into your living spaces. In our 40+ years of service, we've seen firsthand how a damaged liner can put families at risk.
Three Types of Flue Liners
🧱 Clay Tile Liners
The original standard. Found in most homes built between 1900–1980. Made of fired clay tiles stacked inside the chimney.
⭐ Stainless Steel Liners
Our top recommendation for most homes. A flexible or rigid metal tube inserted into your existing chimney. Works with all fuel types.
🏗️ Cast-in-Place Liners
A cement-like material is poured or pumped into the chimney, creating a seamless, insulated liner. Excellent for restoring structurally damaged chimneys.
Warning Signs of a Damaged Liner
- →Pieces of clay tile or debris falling into your fireplace
- →White staining (efflorescence) on the outside of your chimney
- →Strong, unpleasant odor when the fireplace isn't in use
- →Smoke entering the room instead of going up the chimney
- →Failed chimney inspection or Level 2 video inspection
- →Your home was built before 1940 (may have no liner at all)
- →Visible cracks in the flue tiles during inspection
💡 Pro Tip from Our Team
We perform video inspections using a specialized camera that travels the full length of your flue. This is the only way to truly assess your liner's condition — a visual inspection from the top or bottom only shows a fraction of the picture. If you're buying or selling a home, a Level 2 inspection with video is essential.