Abstract: A method and apparatus for creating an insulated barrier within a fireplace is described. A compressible insulator may be placed in a fireplace. Within the fireplace, the compressible insulator may be placed above a lintel on the inside of a firebox opening. The compressible insulator may also be placed below a damper. The compressible insulator may be used to insulate a fireplace and increase the temperature differential between the living space and air trapped between the compressible insulator and the damper. The trapped air may also increase the temperature differential between the living space and the chimney above the damper.