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Fireclay in the hearth floor? - Forno Bravo Forum: The Wood-Fired Oven Community

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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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Fireclay in the hearth floor?

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  • Fireclay in the hearth floor?

    By way of intrduction:
    I am an Optometrist in the Jacksonville area, and have started a project at my "fishing place" in Crescent Beach. A friend recently renovated a 1950 vintage house on Little Pottsburg Creek, and found nearly two pallets of firebrick under the old porch, apparently used as fill.
    I have decided to build an Alan Scott style oven out of these firebrick.

    I have poured a slab, and completed the oven stand, now ready to pour the hearth floor.

    My question is this-- Should I incorporated fireclay into the concrete layer
    of the hearh floor? And if so, at what proportion?

    I would appreciate any insight on this subject.

  • #2
    Re: Fireclay in the hearth floor?

    Welcome, We have some alan scott style bread oven builders here. The fireclay layer under the hearth floor mostly dates from the time when builders used vermiculite concrete for their under-floor insulation, and were left with a rough surface that needed to be leveled before laying down the floor. This is less important if you use modern refractory insulation blocks under the floor which leave a smooth surface. I just laid my bricks down on top of my insblock19 insulation.

    Re-reading your question, it's about fireclay in the support slab. The answer is no - you want regular portland-sand-gravel concrete for maximum strength. This slab holds up a lot of weight, and under the insulation it won't get hot anyway, just warm to the touch.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Fireclay in the hearth floor?

      appreciate your response
      Thanks!

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