This will depend on the current construction and condition of your chimney. We assess each chimney individually. In many cases it is unnecessary to line the chimney. For example if you have a 1970’s house you will more than likely have a concrete block liner that if in good condition, should be adequate for your stove. If you have a large brick chimney, it is often advisable to line it. This increases the draught, which in turn makes your stove work better and lowers the risk of tar and soot build up, which can cause chimney fires.