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Should you use mortar on arch bricks? - Forno Bravo Forum: The Wood-Fired Oven Community



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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Should you use mortar on arch bricks?

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  • Should you use mortar on arch bricks?

    I have firebrick already wedge-shaped (KX-99's) for my dome and have built my arch template with virtually no gaps betwwen the bricks. Do I need a thin layer of mortar between the bricks or can I leave it clean? I'm afraid if I use mortar, it will screw up my template and my measurements will be off. Has anyone used the wedged firebricks for their dome?


  • #2
    Re: Should you use mortar on arch bricks?

    An absolutely mortar free dome is possible in theory, but I'm not sure it can work in practice. One of the problems is that big opening at one end which sets up a bunch of instabilities in the system.

    Commercial refractory mortars are meant to be used in very thin layers, so if you have every brick cut (really? mind boggles) you could just increase the size of the dome slightly.

    We would like to see your drawings of this engineering feat if at all possible. Those who have done full-cut domes have cut ring by ring, as every one is different. Most have fudged so that only the visible inside looked fully fitted.
    My geodesic oven project: part 1, part 2


    • #3
      Re: Should you use mortar on arch bricks?

      I agree with dmun. I've never seen or heard of one being built without mortar.