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Cal sil board to replace Vermiculite - Forno Bravo Forum: The Wood-Fired Oven Community

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Photo Galleries are back! Instructions below.

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!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
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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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Cal sil board to replace Vermiculite

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  • Cal sil board to replace Vermiculite

    Hi,
    I have placed Cal Sil boards (from Darley refractories OZ) directly onto the concrete hearth. There is no layer of vermiculite mix under the boards. The boards are 25mm (1") thick, 1000mm x 610mm and cost 50 bucks each. You need four to cover the dome site. I have been assured that this thickness is sufficient to insulate the oven floor (75mm/3")fire brick from the concrete hearth. Any thoughts on this?

  • #2
    Re: Cal sil board to replace Vermiculite

    I don't have an answer, but a similar question. Although you could have maybe got a better price from Johnny-the-oven-man from these forums for the Cal-Sil board.

    I am also planning to use the Cal-Sil board (50mm) between my oven bricks and the concrete hearth slab, but I also want to install a thermocouple.

    The thermocouple probe is about 300mm long and i'll have it sticking up through the Cal-Sil board and into the floor of the oven between a couple of bricks, but it has a plastic handle thing on it, so what i want to know is will the Cal-Sil board be enough to keep the temps down so that the plastic handle and wire doesn't melt, or do i need to put some Vermiculite between them as well?

    Comment


    • #3
      Re: Cal sil board to replace Vermiculite

      Which brings up a question I had....!

      Do you pour anything from the edge of the board to the edge of the supporting slab? Or do you cut the board to just fit the dome and let the rest of the materials come all the way down to the supporting slab itself?

      Sorry if this is confusing.

      Bill
      Bill

      Oven Build:http://www.fornobravo.com/forum/f8/b...oven-5927.html

      Progress pictures:
      https://picasaweb.google.com/billbel...eat=directlink

      Cooking pictures:
      https://picasaweb.google.com/billbel...eat=directlink

      Comment


      • #4
        Re: Cal sil board to replace Vermiculite

        Not confusing at all Bill. The plans seem to call for the insulation to go across the whole surface of the support stand. Many including myslef have modified the plans so that we are in fact only insulating the area that needs to be and the areas not needing insulation are filled with something like concrete. To me the vermicrete or other insulation needs to be contained and protected from any and all water intrusion. To run all the way to the edges seems to invite water problems IMHO.
        You can see what I did on my stand and WFO on the thread "Steel Dome Oven".
        Wiley

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        • #5
          Re: Cal sil board to replace Vermiculite

          I had similar issue with my oven. I had a 1" cal sil board (purchased from Johnny the Oven Man in Mulgrave Vic) to insulate the oven hearth. After asking lots of questions I also went for 3" of vermiculite concrete as well as the cal sil board. Once your oven is built you cant put anymore insulation underneath it, and as everyone says you can never have too much insulation.

          Cheers
          Jase

          Comment


          • #6
            Re: Cal sil board to replace Vermiculite

            Wiley, you get the prize for thinking outside the dome. Well done!
            Jase, thanks and you're right, hard to go back and change.
            Bill
            Bill

            Oven Build:http://www.fornobravo.com/forum/f8/b...oven-5927.html

            Progress pictures:
            https://picasaweb.google.com/billbel...eat=directlink

            Cooking pictures:
            https://picasaweb.google.com/billbel...eat=directlink

            Comment

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