When relining a chimney, we start by looking at the type of appliance that is to be vented into the flue.  There are several ways to reline a chimney.  A stainless steel liner is the most common way.  There are different grades and thicknesses of stainless steel, and the type of appliance that is being used determines which grade and thickness of stainless steel should be installed. We also use a product called HeatShield® for the relining of some chimneys.