What is the primary purpose of a chimney lining?

The primary purpose of a chimney lining is to contain combustion gases. Proper chimney liners are crucial for ensuring safe ventilation of these gases, which can be harmful if they escape into the living spaces of a building. Linings help maintain the integrity of the chimney by directing the exhaust safely to the outside, preventing the risk of flue gas leaks that could lead to dangerous situations such as carbon monoxide poisoning or chimney fires.

Chimney liners are typically made of materials that can withstand high temperatures and resist corrosion from the byproducts of combustion. This containment not only enhances safety but also improves efficiency by maintaining the draft needed for optimal operation of the heating system.

While a chimney liner can contribute to the overall structural support and may have a minor role in preventing heat transfer, these are not its primary functions. Enhancing aesthetics has little to do with the essential purpose of chimney linings, which is fundamentally about safety and efficient operation.