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New Wood Burning Fireplaces

NewHouse2016 Member Posts: 2
My masonry contractor is getting ready to start on my fireplaces in my new house. I have several questions: 1) Should refractory cement be used in the firebox, smoke chamber and between the flue liners? He wants to use type N mortar. 2) Should fire brick only be used in the firebox? My contractor say yes and says soft red brick for the smoke chamber. His reason for the red brick in the smoke chamber is so that they can be parged. 3) Should the clay flue liners be insulated? Was thinking about using a industrial refractory blanket type insulation. Thank You


  • Tim Potter
    Tim Potter Member Posts: 272
    Lots of info here:


    Winter Park, CO & Lenexa, KS
  • Gordy
    Gordy Member Posts: 9,514
    Type n was always used in the fire box, and flue tiles. Refractory mortar is more costly, may be code in your jurisdiction.

    Parging the smoke chamber is better with red brick(adhesion).

    I have 5 masonry fire places done in 52. Type n was used in the box, and liners. Fire brick in smoke chambers although mine are not parged.