Signs your flue liner may be cracked

Visible Damage

One of the most obvious signs of a cracked flue liner can be visible damage inside the flue. This may include visible cracks, splits, or pieces of the liner found in the fireplace.

Damage may also manifest as missing or deteriorating mortar joints that can be seen during a routine inspection of the accessible parts of the flue.

Performance Issues

If your fireplace is not drawing smoke properly, or you notice more smoke in your home than usual, your flue liner might have a crack.

Additional signs can include an increase in creosote build-up or decreasing efficiency in how your fireplace burns, suggesting an airflow problem from a compromised liner.

Unusual Odors or Sounds

Strange odors, especially those that persist after cleaning, can indicate a breach in the flue liner allowing gases or moisture to seep into the home.

Listen for unusual sounds when using your fireplace, such as wind noise within the chimney, which could suggest gaps or cracks in the liner.