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connecting inner and outer arches - 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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connecting inner and outer arches

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  • connecting inner and outer arches

    Ok, I've tried to find this explained in the archived threads but still not sure I understand. I have an inner arch that is made of firebrick and is basically fused into my dome. Actually it protrudes about 4 inches from the dome. I am going to build the outer arch of red brick and have it maybe a half inch wider than the inner arch all around.
    I have read that you should mortar the bottom bricks of the outer arch to the floor. I don't understand if I should be motoring the bricks of the outer arch to the bricks of the inner arch. I read about a gap to prevent heat loss and also if the arches are mortared together the joints will break from heat differentials. So could I just have the outer arch bricks bump up against the inner firebricks and just not mortar them together?
    If I do this I just don't understand what keeps the outer arch from flopping over, except the bond of the chimney over the created vent.

  • #2
    Re: connecting inner and outer arches

    Originally posted by maineoven View Post
    I don't understand if I should be motoring the bricks of the outer arch to the bricks of the inner arch. I read about a gap to prevent heat loss and also if the arches are mortared together the joints will break from heat differentials..
    Yes, use mortar. Once you get outside the dome the heat loss is insignificant. There has been much discussion about a "heat break". I can cook for three days after one fire. If someone can use the oven after four (our design), I am not aware of it.
    Check out my pictures here:
    http://www.fornobravo.com/forum/f8/les-build-4207.html

    If at first you don't succeed... Skydiving isn't for you.

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