Homeowner Guides
When Does a Chimney Need Relining?
Relining means installing a new approved venting liner inside an existing chimney. It can be an effective repair, but it should be recommended for a specific reason.
A chimney should not be relined simply because relining is a service a contractor sells.
Reason 1: The existing liner is damaged
Cracked clay tiles, failed joints, missing sections or severe deterioration can reduce the liner’s ability to contain heat and combustion products.
A camera inspection may be used to document the condition and determine how extensive the damage is.
Reason 2: The appliance is changing
A new wood stove, insert, gas appliance or other fuel-burning appliance may require a different vent size or liner material.
An existing masonry flue that was acceptable for an open fireplace may not be suitable for a modern high-efficiency appliance.
Reason 3: The flue is improperly sized
Venting systems need to be matched to the appliance. An oversized flue may cool gases too quickly, while an undersized flue may restrict flow.
Correct sizing can improve draft and help the system operate as intended.
Reason 4: Chimney-fire damage
After a chimney fire, clay tiles can crack and metal components can warp or separate. If the existing liner no longer meets safe-use requirements, relining or replacement may be part of the repair.
Reason 5: Corrosion or incompatible materials
Certain fuels and appliances produce condensate that can corrode inappropriate vent materials. A liner should be selected for the fuel and appliance category.
What relining does not fix
Relining does not repair:
- Loose exterior brick
- Failed crown
- Roof flashing leaks
- Leaning chimney structure
- Damaged fireplace facing
Those are separate issues even if they occur at the same time.
Why inspection level matters
A change in fuel type or appliance is one situation commonly associated with a more detailed Level 2 inspection. The goal is to evaluate the existing system before connecting something new to it.
Relining options
Common approaches include listed stainless systems and other approved liner methods depending on the chimney and appliance. The best option depends on:
- Fuel type
- Flue geometry
- Appliance requirements
- Existing liner
- Clearances
- Chimney condition
Local permit considerations
Denver lists certain fireplace and gas vent work within its permit processes. Pikes Peak Regional Building Department states that fireplace or stove installation is among the home-improvement projects requiring permits in its jurisdiction. Fort Collins similarly identifies fireplaces, fire pits, wood-burning stoves and gas/wood-burning appliances among permit categories.
Always verify current local requirements before beginning an installation or conversion.
Keaton Chimney Solutions provides chimney liner inspection, relining and related repair throughout Denver, Colorado Springs, Fort Collins and surrounding communities. Call 720-734-5373.
Can a liner be installed without removing old clay tiles?
Sometimes, if there is adequate space and the new system can be installed according to its listing. Other projects require tile removal.
Will a new liner improve draft?
Correct sizing can improve performance in some systems, but draft problems can have multiple causes.
Should a liner be replaced after every chimney fire?
Not automatically. It should be inspected; replacement or relining depends on the damage found.
Need help with a chimney or fireplace in Colorado? Keaton Chimney Solutions serves Denver, Colorado Springs, Fort Collins, and surrounding communities. Call 720-734-5373.