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Duraboard vs Insboard vs FB Board - Forno Bravo Forum: The Wood-Fired Oven Community

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Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

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To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
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Duraboard vs Insboard vs FB Board

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  • Duraboard vs Insboard vs FB Board

    I'm wondering if there are any serious advantages/disadvantages to any of these insulation boards? I might have a local supplier for the first 2 which could potentially save me shipping costs but I don't want to save a little money on an inferior product.

    Thanks,
    Shay
    Shay - Centerville, MN

    My Outdoor Kitchen/Pompeii WFO Build...

  • #2
    Re: Duraboard vs Insboard vs FB Board

    Duraboard, Insboard 23 and FB Board are all ceramic fiber boards. Duraboard and Insboard are made in the USA, FB board is made in China.
    Insboard 19 is mineral wool based.
    All of these boards are made of fibers and binders, the binders will burn off at temperatures over 450 deg F, leaving behind a board that does not have any strength. I prefer using Super Isol cal sil board, which will retain some strength.

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    • #3
      Re: Duraboard vs Insboard vs FB Board

      the binders will burn off at temperatures over 450 deg F, leaving behind a board that does not have any strength.
      I don't think this is true. In years of building with insulation boards, we've only had one collapse, with a board not cited above, and that was moisture related, not a heat failure.

      Refractory boards are designed to bear weight, whether they are cal-sil or mineral wool based.
      My geodesic oven project: part 1, part 2

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      • #4
        Re: Duraboard vs Insboard vs FB Board

        Duraboard / Insboard / FB Board are not structural insulations designed to support much weight. Will they work in a sub hearth application? Yes, they will insulate, and they will provide some support, but this is not the function for which they are intended.

        Regarding burn out:
        here is the link (from the manufacturer) that discusses burn out: Unifrax.com

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        • #5
          Re: Duraboard vs Insboard vs FB Board

          The guy at Harbison-Walker sold me the Ins. 19 last year, knew what I was using it for, and said it would be fine. It has been. I have it under my floor, and my dome sits on top of the floor, not around it.

          I have no structural issues at all other than my own mistakes, which have caused a few cracks.

          I'm with Dmun.
          Elizabeth

          http://www.fornobravo.com/forum/f8/e...html#post41545

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          • #6
            Re: Duraboard vs Insboard vs FB Board

            Originally posted by dmun View Post
            I don't think this is true. In years of building with insulation boards, we've only had one collapse, with a board not cited above, and that was moisture related, not a heat failure.
            Sounds like me ! And even my crappy board seems to be working quite nicely now that everything's dry.
            Ken H. - Kentucky
            42" Pompeii

            Pompeii Oven Construction Video Updated!

            Oven Thread ... Enclosure Thread
            Cost Spreadsheet ... Picasa Web Album

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            • #7
              Re: Duraboard vs Insboard vs FB Board

              I have just acquired some insulating board but don't know what sort it is (it's white, 5cm thick x 35cm wide) - but it seems very soft to be supporting an oven so I'm not sure I'll use it in my build - I can dent it quite easily with my fingers... is this normal?
              My rustic oven;
              http://www.fornobravo.com/forum/f8/p...oven-6770.html
              sigpic

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              • #8
                Re: Duraboard vs Insboard vs FB Board

                I have just acquired some insulating board but don't know what sort it is (it's white, 5cm thick x 35cm wide) - but it seems very soft to be supporting an oven so I'm not sure I'll use it in my build - I can dent it quite easily with my fingers... is this normal?
                Is it a refractory material? There are a lot of foam panels out there that you wouldn't want to take much over room temperature. I'd think twice before using mystery foam in a high heat situation.
                My geodesic oven project: part 1, part 2

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