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Help with insulating the base - Forno Bravo Forum: The Wood-Fired Oven Community

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Forno Bravo Forum Community,

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
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To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Help with insulating the base

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  • Help with insulating the base

    hi everyone, can someone tell me how I insulate the base of what a round wfo will be sitting on? What order and how many inches. For instance, from the bottom up, you put cement, then what is next layer, then next , then next until you lay your firebrick oven floor. Thanks so, so much!

  • #2
    Re: Help with insulating the base

    Here ya go:

    http://www.fornobravo.com/forum/f8/p...load-1674.html
    George

    My 34" WFO build

    Weber 22-OTG / Ugly Drum Smoker / 34" WFO

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    • #3
      Re: Help with insulating the base

      In brief, the oven rests on a reinforced concrete slab, four inches or so. On top of this is your insulation, either four inches of vermiculite concrete, or two inches of refractory insulation board. If using vermiculite, a leveling mixture of sand and fireclay is put down, then the firebrick floor. Most everyone lays the firebrick flat, for two and a quarter inches.
      My geodesic oven project: part 1, part 2

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      • #4
        Re: Help with insulating the base

        Hi Dmun...Thanks for the great advice. I want to insulate well and not skimp on any conditions. Can you please tell me how you would insulate the firebrick dome in the order that it goes and how many inches of the insulation. Thanks so much!

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        • #5
          Re: Help with insulating the base

          I insulated my base with one inch of percrete on top of the structural slab, plus two inches of FB board. A full hot burn at equilibrium on my oven does not get the opposite side of the structural slab more than about 100 or so degrees--basically a hot Minnesota summer.

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          • #6
            Re: Help with insulating the base

            Hi Eric,

            Is percrete perlite and concrete? FB board is what kind of board? Thanks so much!

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            • #7
              Re: Help with insulating the base

              Is percrete perlite and concrete?
              Perlite (or vermiculite) and portland cement. The perlite is a lightweight aggregate, not a concrete additive.
              FB board is what kind of board?
              Refractory mineral fiber board. I used insblock19. There are lots of brands, and a more expensive alternative, calcium-silicate (cal-sil) board.
              My geodesic oven project: part 1, part 2

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              • #8
                Re: Help with insulating the base

                Dmun beat me to it! Best wishes on your build!

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                • #9
                  Re: Help with insulating the base

                  Thanks everyone for all of your great help! Mina

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