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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?

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    • #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.

      Books.

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