Do I Need a Chimney Liner?

July 24, 2018

Most people think of the fireplace and outside of your chimney but have you ever thought about what’s inside your chimney. It is recommended by the CSIA that all chimneys be equipped with clay, ceramic, or metal conduit to contain the combustion products, and direct them to the outside atmosphere. The liner also protects walls from heat and corrosion. Which type is best though?

Clay tiles are most common and perform well for open fireplaces that are maintained. The problem with clay is that because it is ceramic it does not evenly distribute heat, because of this they can easily warp and crack compared to metal. They are also not recommended for gas fireplaces because they cannot contain the moisture that is produced.

Metal liners are typically stainless steel or aluminum, and are typical when replacing your fireplace. Since they meet UL testing requirements, if properly installed are safe and durable. It is recommended that metal lines have high temperature insulation placed around them to help improve safety and performance.

Cast-in-place liners are lightweight, cement products that help form a seamless insulated are for gasses for pass through. These liners can help improve structural integrity of older chimneys, and are permanent liners that can be used for all flues.

If you have questions concerning your type of liner or if you have a liner at all, contact our local Apex office today to schedule your next inspection.