How Often Should I Replace My Chimney Liner?

Your chimney liner plays a critical role in protecting your home and keeping your chimney safe, clean, and running efficiently. They work to shield chimney flues from heat and corrosion, improve energy efficiency, and most importantly add an additional layer of safety for your household. Since it’s a critical component, it’s important to make sure it’s in good working order. Let’s take a closer look at how often you should replace it and how you know when to replace it. 

What Is a Chimney Liner?

Today, building codes require chimney liners for all chimneys. They keep dangerous gases and high heat contained within your chimney system. There are three main types of chimney liners with different lifespans and maintenance requirements. These are:

• Clay Tile: Typical of older homes. They are an affordable approach, but tend to be more prone to cracking after years of exposure to heat and moisture. 

• Metal (Stainless Steel): More durable than clay liners, lasting 15-20 years. They are also more versatile, working well for all wood, gas, or oil appliances.
• Cast-in-Place (Cement): Very durable, but costly to install as they are poured into place creating a seamless, insulated liner. 

How Do I Know If I Need a New Chimney Liner?

There are some telltale signs that your chimney liner may need to be replaced. Look for any of the following signs and call your chimney professional.

• Cracked or broken clay tiles: If you have a clay tile liner, over time they may break and clearly signal a replacement in your future.

• Deteriorating chimney masonry: There are many causes of crumbling bricks or mortar, but high heat and moisture escaping through a damaged liner is a leading cause.

• Smoke or odors inside your home: Besides excessive creosote buildup, a damaged liner is the next culprit to blame for strange noises and smoke. 

• Rust or corrosion: Metal liners are prone to rust, warping, or holes when moisture and acid have overcome the liner.
• Poor heating efficiency: If you’re struggling to start a fire or experience smoky conditions, there’s a good chance you’re experiencing airflow problems.

How Often Should You Replace Your Liner?

There’s no exact science, but here are the general guidelines:

• Clay liners: Inspect annually; may need full replacement after 15–20 years or sooner if cracking is evident.
• Metal liners: With good maintenance, expect a 15–20 year lifespan.
• Cast-in-place liners: Often last several decades, but still require regular inspection.

If you’re experiencing any of the above issues or think you are in the market for a new chimney liner, don’t hesitate to call the trusted and certified chimney professionals. 

In the Market for a New Chimney Liner? Call Felgemacher Fireplace Today!

Felgemacher Fireplace is a third-generation fireplace company dedicated to providing the best quality service to Rochester, NY; Buffalo, NY, and surrounding residents. We have over 60 years of experience in chimney repairs, cleaning, rebuilding, maintenance, and fireplace installation. If you’re in or around Buffalo or Rochester, call Felgemacher Fireplace today to get started.