Homeowner guide
Chimney Relining in Ontario: What It Involves and What Drives the Cost
Relining cost depends on the liner material and diameter, the height of the chimney, whether insulation is required, and how difficult the existing flue is to clear.
A liner contains combustion gases and protects the masonry from heat and acidic condensate. When the original clay tiles crack, or when a new appliance needs a different flue size, relining is what brings the chimney back into service.
This guide explains when relining is needed, the options, and why two quotes for the same house can look very different.
Signs a chimney needs relining
- Pieces of clay tile appearing in the firebox or cleanout
- An inspection showing cracked or offset tiles
- Damp patches or staining on the chimney breast inside the house
- A new appliance with a different flue size to the existing chimney
- Persistent draft problems that cleaning does not resolve
- An oversized flue serving a modern high-efficiency insert
Liner options
- Rigid stainless steel: strongest draft performance where the flue is straight
- Flexible stainless steel: fits offsets and bends, the usual choice for insert installations
- Insulated liner kits: required where clearances or condensation demand it
- Cast-in-place: used to rebuild the flue passage in badly deteriorated masonry
What drives the cost
- Chimney height and the number of offsets
- Liner diameter and whether insulation is wrapped or poured
- Roof pitch and access equipment needed
- Removing broken tiles or obstructions before the liner goes in
- New top plate, cap and appliance connector components
Services covered in this guide
Want this looked at on your own home?
Send us the details and we will confirm what the visit involves and what it costs before we attend.