Chimney Liner Damage: Repair Tips

The chimney liner acts as a passageway through which combustibles can safely exit your home. It also provides a barrier that protects your chimney walls from heat and corrosion. That said, the flue liner is crucial to the safety of your fireplace.


In this post, Paddy’s – a trusted expert in chimneys and decks – discusses the common causes and signs of a damaged flue liner. We also share some information on how your chimney liner can be fixed.

What Causes Flue Liner Damage?

Damaged flue liners are typically caused by any of the following:

  • Improper construction

  • Deterioration due to the acidic nature of flue gases

  • Wrong size of lining for an appliance (usually causes an excessive amount of creosote buildup)

What Are the Signs of a Damaged Flue Liner?

Unlike damage to the gutters, there are no obvious signs that will tell you if your flue liner is damaged or unsafe. In some cases, broken bits of masonry may end up in your fireplace or debris from a deteriorating flue liner may drop into the firebox. But generally, it can be hard to tell if you have a damaged flue liner. The best way to detect this kind of problem is through a chimney inspection. Make sure to have a professional check the flue at least once a year. This way, you can be informed early on if your chimney has become unsafe.

How Can Flue Liner Damage Be Fixed?

If your flue liner is made of tiles, repair can be difficult to pull off as it might require partial teardown of your chimney. Your chimney technician will likely recommend replacing your flue liner and switching to stainless steel. Stainless steel is corrosion-resistant, so it’s more durable than tile liners. The material is also easier to clean, making its upkeep more manageable.

Paddy’s is a family-owned and -operated business that provides top-notch services to local customers. We carry out a variety of projects, including roofing, siding, windows and doors, and more. Call us at (302) 388-3625 or fill out our contact form to request a free estimate.

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