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Insulating firebrick - Forno Bravo Forum: The Wood-Fired Oven Community

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  • Insulating firebrick

    I am planning on building a oven in the future. Being the cheap scrounger that I am, I have been on the lookout for the materials that I will need. I have found a source for used light weight insulating firebrick. Would these be a good to use for the insulating layer under the hearth, instead of the vermiculite cement mix. I can get them for about 75 cents each. Has any one used these for this application?

  • #2
    Re: Insulating firebrick

    Bob,

    Insulating firebrick (IFB) are fine for underhearth applications and yes, several builders have used them. They have approximately the same R factor as vermicrete. As such, you would be better off to stand them on their sides to give 4 1/2" of insulation instead of 2 1/2". They would also work well under a layer of insulating board.

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    • #3
      Re: Insulating firebrick

      Thank you for your reply. I was not finding any info on the insulating bricks. I guess I will score some of these. I think they would be easy to work with

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