One of the most important parts of your chimney system is the chimney liner. A proper chimney liner protects your masonry chimney from the heat of a fire and the byproducts of combustion that can wreak havoc on the interior of your chimney. It also prevents heat, smoke, and carbon monoxide transfer.

The standard chimney liner has traditionally been made of clay or ceramic tiles, and there’s a good chance that your liner is made of these materials. While these liners are affordable and readily available, they have some decided disadvantages: The constant heating and cooling will cause tiles to fracture and break over time, leaving exposed areas of masonry. When unprotected masonry is exposed to the byproducts of a wood-burning fire, it can develop many problems that can render your fireplace unusable and cost you thousands in repairs. Additionally, cracks in the flue liner allow heat and dangerous byproducts to access other areas of your home.