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I can only pick one - Forno Bravo Forum: The Wood-Fired Oven Community



New Forno Bravo Forum Feature

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.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

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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I can only pick one

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  • I can only pick one

    So, I am in Mass. I have luckily been able to find a supplier for Durablanket and Duraboard. I also have a wholesale supplier of perlite and vermiculite.

    Blanket and board together are too cost prohibitive. I could use all perlite/vermiculite, but I would like to get the most for my money.

    The question is what would you choose to do:

    1. 4.5" Insulating concrete using perlite and 3" of durablanket insulation around the dome

    2. 2" Insulating duraboard under the oven and loose fill perlite around the dome to 4-6"

    Or any other suggestions.

  • #2
    Re: I can only pick one

    I used 3.5 vermiculite/Portland at a 5 to 1 ratio and 4 inches of ceramic blanket add I am more then satisfied with my oven's heat retention. In hind site I do wish I went to 4.5" but that is before I started with this place. So in my do-over land that is the only change I would make.

    Hope that helps, Faith


    • #3
      Re: I can only pick one

      Logic would seem to indicate that the best place to spend the money is on the dome as heat rises. However, I could see an argument that the floor could become a heat sink also and wick heat away from the cooking surface.

      Thanks for the feedback Faith



      • #4
        Re: I can only pick one

        Not really Jake, Heat rises in an air environment for the most part. In solid surfaces I see heat more as a migration. The heat will migrate to the cool so your heat loss is almost equal floor to dome. So the mantra around here is "insulate, insulate, insulate". Your on the right track with either of your choices.


        • #5
          Re: I can only pick one

          I had the same problem when I built my Pompeii. I went with 4" of vermicrete under the hearth and 3" ceramic blanket over the dome, plus another 3" of vermicrete over the blanket. My oven stays hot enough to cook something for 3-4 days, at least.
          Build Thread, http://www.fornobravo.com/forum/f8/e...-pa-13750.html


          • #6
            Re: I can only pick one

            I'm in a similar situation to you. I'm trying to keep my costs down. As much as I'd like to use the Duraboard 2" and Durablanket 3" it's going to cost me $450 (assuming I drive down to Atlanta and pick it up (4h round trip).
            I figure 20 sf Duraboard at $11/sf (1@2x4 + 2@2x3 ) + 3 rolls of Durablanket (S Blanket 2300) at $70 for 50sf + sales tax.
            The portland cement and vermiculite is my likely choice for the bottom at 5" thick. The woman on the phone at the Feed&Seed store has vermulite for $15/bag for a 'big' bag. I'll need to go see it - lol.
            I'm having a hard time estimating how much I'll need as the vermiculite/perlite will likely shrink some.

            So what did you finally choose?

            My 42-inch build


            • #7
              Re: I can only pick one

              Hi Jeff,
              So, I am going with a fairly thick insulating layer of vermiculite concrete (5 1/2" aka 2x6 frame). Then I was able to locally find durablanket 6# 1"x2'x50' for $75 a roll. I was able to get 4 cuft("big") bags of vermiculite for about $13 each. Make sure you get as corse as you can, a lot of garden vermiculite is fine. Pictures of what the bags I got look like in this thread:

              I would say since the vermiculite is not too expensive get slightly more than you think you need, bump up to the next bag if you are on the edge and return it if you don't use it, or start a veggie garden with it next year.

              So, what I have:
              2 x 4cuft vermiculite super coarse at $13 each(dad grows flowers for a living)
              3 x 1"x2'x50' 6lb durablanket at $75 each

              Not too bad price wise. The local source for the blanket also has the board, but it is crazy expensive.