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Expansion gap between cooking floor and dome - 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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Expansion gap between cooking floor and dome

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  • Expansion gap between cooking floor and dome

    Hi there !
    Could anybody tell me what would be the "ideal" gap between the cooking floor and the wall of the dome in a 36" wfo considering, of course, that the dome is outside the cooking floor.
    I'll use 32% firebricks.
    Any advice is welcome !

  • #2
    Re: Expansion gap between cooking floor and dome

    Seriously, no reply ?
    Have you all, guys, built your oven(s) with the dome on the cooking floor ? Didn't any of you built it with the floor inside the dome ?

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    • #3
      Re: Expansion gap between cooking floor and dome

      Give them a chance to wake up and shower before they reply.....

      I built my oven on the floor, why wouldnt you?
      The English language was invented by people who couldnt spell.

      My Build.

      Books.

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      • #4
        Re: Expansion gap between cooking floor and dome

        Well, in the Pompeii Oven Instructions they say that the majority of Italian ovens are built with the floor inside the dome and the main advantage is that it offers better thermal performance.

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        • #5
          Re: Expansion gap between cooking floor and dome

          Originally posted by blaise View Post
          and the main advantage is that it offers better thermal performance.
          I cant see how the thermal performance can differ from either type of build.

          You have to remember that the "plans" are just a guide and a starting point.
          The English language was invented by people who couldnt spell.

          My Build.

          Books.

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          • #6
            Re: Expansion gap between cooking floor and dome

            About 5mm should be plenty. Some builders have used corrugated cardboard which will burn away when you fire the oven.
            Last edited by david s; 04-25-2013, 11:20 AM.
            Kindled with zeal and fired with passion.

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            • #7
              Re: Expansion gap between cooking floor and dome

              It is not properly called an expansion joint nor is one needed. The dome will expand more than the floor due to the greater length involved. It is a construction joint and can be made as tight as you want. I prefer to build on the floor though.

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              • #8
                Re: Expansion gap between cooking floor and dome

                Many thanks for your replies.
                I think I'll build on the floor

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                • #9
                  Re: Expansion gap between cooking floor and dome

                  Either way, neither way helps an oven perform any better. Good luck with your build
                  Old World Stone & Garden

                  Current WFO build - Dry Stone Base & Gothic Vault

                  When we build, let us think that we build for ever.
                  John Ruskin

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