Many of you may be wondering what a chimney liner is and whether you may need one for your home. A liner may not seem like a vital part of your chimney, but in all actuality, it is very important. Below we will go over what you need to know about chimney liners and their benefits so you can decide what’s best for your home.
Before the 1940s, homes were built without a chimney liner, and as a result, house fires were A LOT more common. This is because a chimney liner does exactly what it sounds like it does: It lines your chimney to protect the interior of the chimney and helps guide the gases and particles up and out of your house. Fireplaces and stoves that burn gas, oil, or solid fuels give off combustible by-products, and a liner creates a direct path for these by-products to exit your home.
Most homes nowadays are constructed with a clay or ceramic liner as they are inexpensive and work well with a properly maintained, brand new, or open fireplace chimney. However, clay or ceramic liners are not the most durable because they can crack under extreme weather conditions.
Another liner type is the aluminum liner. While they are very durable, retain the heat well, and keep your chimney walls protected, they are only suitable for gas fireplaces.
Finally, there is the stainless-steel chimney liner. Stainless steel liners are extremely durable and are perfect for most fuel types. These come in either a rigid or flexible option. Rigid liners are typically used in chimneys that are completely straight and do not have off-sets or bends. Their flexible counterparts, however, hold less buildup as they can expand and contract with the temperatures of the chimney which knocks off any creosote or build-up when it moves. Corrosion is the most problematic issue with metal liners, but this can be addressed by using the correct alloy to go with the type of fuel being burned. You’ll want 304L for wood-burning appliances or 316Ti stainless for all fuels (wood, oil, gas, coal).
While all types of liners each have their own benefits, the most important thing is that your home has a liner in the first place. Hire a chimney professional to help determine the best option for you.
If you go with a stainless-steel liner, we recommend checking out the Forever Flex Stainless Steel Chimney Lining Systems. These systems are made with 316Ti first run alloys, and all the components are designed with ease of assembly in mind. You can find them on our website here: http://bit.ly/2ZBWlvQ