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Fireclay under floor? - Forno Bravo Forum: The Wood-Fired Oven Community

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I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

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.

Ask Me Anything New Forum Feature

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.

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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Fireclay under floor?

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  • Fireclay under floor?

    Referring to the layer of dry fireclay/sand mix(page 27 of the downloadable plans) spread under the firebrick floor, is fireclay necessary, or will just sand work?
    I know fireclay is more heat resistant than sand. But think about it. Heat resistant materials vs non heat resistant. When exposed to the high heat of the oven, materials such as standard brick will fail structurally. But what structural support does the fireclay give that sand could not? Sand is already broken down. It does not matter if sand cracks or spalls.
    What does the fireclay add?

  • #2
    Re: Fireclay under floor?

    What does the fireclay add?
    Fireclay makes the mixture sticky, and keeps it from sifting down into the vermiculite concrete, or leaking out the side. What insulation are you using? The fireclay mixture is just a leveling medium: if you are using insulation boards you may not need it at all.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Fireclay under floor?

      Sticky. Got it. Thanks.
      I plan on building on an insulated hearth of vermicrete, so I need the leveling medium.

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