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Firebrick confusion - 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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Firebrick confusion

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  • Firebrick confusion

    I am just about to start a 42" Pompeii type oven. I have seen some threads mention that low duty firebrick works well. The Pompeii kit from FB includes medium duty firebrick. I have access to some 1700 deg F yellow brick that weighs about 7.5lbs for $1.60 per brick here in Albuquerque. I can get brick that is 2000 or 2600 deg rated for $2.80. The dealers aren't sure about the alumina content. Which brick should I go for?
    Also, I've seen differing opinions regarding the insulating board under the oven floor. Is insulating concrete as good? Should the oven floor bricks set into the insulating concrete?
    Thanks for helping a neophyte.

  • #2
    Re: Firebrick confusion

    See if you can find out the manufacture of the brick as they may have mix design info online. If you have the Pompeii plans you can read the section discussing heat absorption and the benifits of the low duty and the problems with the others.

    As far as insulation, you don't need the fiberboard, it just gives you a better insulating value per thickness. I just used 4" of insulated concrete mix over the 4" structural slab and it works fine. I did use 4" of ceramic and about 4 large bags of perlite on the top however. If you want overkill, use both, many do. My oven holds cooking temps for 2 days, so I'm not sure you really need more, unless you just want it.
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    • #3
      Re: Firebrick confusion

      Unless you plan on smelting, use the cheaper firebrick, you will never hit 1700 without a bellows anyway.

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      • #4
        Re: Firebrick confusion

        Thanks for the helpful replies. That clarifies the situation greatly. I have decided to forego the firebrick. After looking at the helpful info in the forum, I have decided to go with a modular oven. I am having someone experienced in adobe ovens build the stand but he doesn't have any experience in building a brick oven. I won't have the time to supervise the building of a pompeii oven. It looks like a great project but I think the modular casa 2G 100 will work better in this situation.
        I look forward to many years of great wfo pizza, flat breads, and rustic breads. The slab is being poured tomorrow and the oven has just been shipped. I have recently been using Peter Reinhart's books and can't wait to get the wild yeast whole grain breads out of the wfo to feed the twins.

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