Aluminum Chimney Liners

So what are they?

The Chimney Safety Institute of America (CSIA) says that a chimney liner is “a clay, ceramic, or metal conduit installed inside of a chimney, intended to contain the combustion products, direct them to the outside atmosphere, and protect the chimney walls from heat and corrosion.”

In other words, chimney liners are an added layer of protection standing between that active fire in your living room and the combustible wood framing in your house. The CSIA further explains that the National Bureau of Standards ran tests on chimneys in the 1940s and 1980s reaching the conclusion that having a chimney built without a liner was so unsafe it could be considered “little less than criminal.”

As people are starting to opt for gas fireplaces over wood, they are also converting their chimney liner to aluminum.

What are aluminum chimney liners?

First and foremost, it should be noted that aluminum chimney liners are only to be used with gas fireplaces. They cannot be installed for fires made from combustible wood (which would require a clay, brick, ceramic, or stainless steel liner). As Pozzi Chimney Sweep explains, “The reason for this is because aluminum cannot withstand as high of heating temperature and if you want your chimney to be protected from heat and combustion you want to go with a material that can take the heat.”


If you are working with a gas fireplace, though, then aluminum may be the right choice for you. Aluminum chimney liners serve the same functions as other flue liners which, as The Oregon Chimney Guys tell us, are threefold:

  • Protecting the framing of your house from overheating and igniting a house fire
  • Protecting the inner walls of your chimney from becoming damaged (which could, again, lead to a potential house fire)
  • Enhance the efficiency of your chimney meaning more heat for less buck

However, aluminum has an added advantage: though it is safer and more durable than older-style liners (like ceramic or brick), it is more cost-friendly than its modern counterpart, stainless steel. 

Using aluminum for gas fireplaces is the perfect way to get the best of both worlds. You’ll have all of the advantages of modern construction (and all the safety that comes with it), but you will save money throughout the installation and maintenance process.

So if you have a gas fireplace, consider installing an aluminum chimney liner for the protection of your house and family.

Located in Central Tennessee? Contact Chimney & Masonry Outfitters today to schedule your appointment and get your chimney lined today!