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Chimney stability question - 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.
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- 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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Chimney stability question

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  • Chimney stability question

    I'm thinking of building an almost freestanding brick chimney for my oven. The vent mount will be firebrick on top of the arch and have clay flue liners bedded on top.
    As I was thinking of doing an arch facade of reclaimed bricks in front of the outer arch, I thought why not build the whole chimney stack around the vent and flue so it is free standing and not putting any extra weight on the arches. Another idea I had was to put a lintel across the back of the two side walls so that the back of the chimney is not resting on top of the dome.
    This effectively means that the whole chimney would be balancing on two side walls.
    Even if I taper the chimney do you think this would this be stable?

  • #2
    Re: Chimney stability question

    This is absolutely the way to go. Except for the lintel in the back, almost every masonry fireplace is built like this. A couple of details: There should be a half inch of free clearance between the flue tile and the brick exterior, and whatever you use for a chimney cap should have some kind of slip plane to allow for expansion of the flue stack when it's hot. I wrapped mine in aluminum flashing before casting the concrete top.
    My geodesic oven project: part 1, part 2

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