Installing an insulated flexible aluminum flue liner in your chimney Published: Aug. 28, 2007, 1:56 a.m.

There are three types of flue liners. The most common material used is clay tile. They are installed in sections and mortared together. The weak link of this system is the mortar.

Additionally, measure the width and depth of the flue to determine the appropriate size of the liner. 3. Obtain Necessary Permits Depending on local regulations, you may need to obtain a permit before ...

We believe that your chimney is not reinforced and that there may or may not be a flue liner. There are alternatives other than tearing down the chimney and rebuilding it from the ground up.