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Hearth insulation - Forno Bravo Forum: The Wood-Fired Oven Community


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Hearth insulation

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  • Hearth insulation

    Thanks to many of you who have posted on Hearth insulation. I have a Mugnaini Medio 110 oven kit and the Mfg. calls for 6" of sand under a 3" concrete base under the hearth. They say that while the sand acts less as an insulator but more as a heat sink to develop thermal mass and keep the floor hotter longer. Although it does take 20 minutes longer to come to temperature. Any thoughts on this design vs perlite/vermiculite concrete mix?

  • #2
    Re: Hearth insulation

    It sounds like something counter productive to your needs! You need the thermal mass under your hearth not to be a drain for your heat, the insulation is to keep it (heat) from being sucked out. Unless, I've gotten it wrong?


    • #3
      Re: Hearth insulation

      Originally posted by huff View Post
      Any thoughts on this design vs perlite/vermiculite concrete mix?
      Do you have a forest of wood to burn?
      Do you have countless hours to waste stuffing the forest into the oven?
      The English language was invented by people who couldnt spell.

      My Build.