What Are The Types Of Chimney Liner?

Types of chimney liners 

Chimney liners come in three main types: Clay Tiles, Metal, and Cast-in-place


1) Clay tiles used to be the most common type of masonry chimney liners. They are inexpensive, readily available, and perform quite well for open fireplace chimneys that are properly maintained. There are two disadvantages to clay tiles. The first is that, being a ceramic product, they cannot rapidly absorb and evenly distribute heat during the rapid temperature rise that occurs during a chimney fire. This uneven heating produces an unequal expansion which in turn causes the flue tiles to crack and split apart. This is similar to immersing a cold drinking glass in very hot water. It will instantly shatter. A chimney with cracked chimney liners must be repaired before use. The second disadvantage is that tiles cannot adequately contain the liquid combustion biproducts produced by modern gas appliances.


2) Metal chimney liners, usually of stainless steel or aluminium, are primarily used to upgrade and repair existing chimneys. These liner systems are properly tested, and if properly installed and maintained are extremely safe and durable. Stainless steel is suitable for woodburning, gas, or oil applications, while aluminium is an inexpensive alternative for certain medium efficiency gas applications only. In some situations high temperature insulation can be used in conjunction with the liners for safety and performance considerations.


3) Cast-in-place chimney liners are lightweight, cast-able, cement like products that are installed inside the chimney forming a smooth, seamless, insulated passageway for the flue gasses. They can improve the structural integrity of ageing chimneys and are permanent liners suitable for all fuels.