By Maggie from Ontario, Canada on May 17, 2014
When would you use this insulation? I have a masonry chimney which is fully operational but with the insert I need to put in a liner, do I need to insulate it?
By Collin C. - NFI Master Hearth Professional on May 19, 2014
Answer:It is a good idea to insulate your chimney liner if your masonry chimney meets any of the following criteria:
1. The chimney is located on an outside wall.
2. The chimney is more than 25 feet in height from the hearth to termination.
3. The fireplace has drafted poorly in its current state or is prone to build up of creosote.
If your installation matches one or more of the listed criteria, insulation will help to ensure the liner stays hot enough to deliver a consistent draft and will optimize the performance of the appliance you install.