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Thermal expansion - 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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Thermal expansion

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  • Thermal expansion


    I was wondering if anyone knows or experienced thermal expansion horizontally in their WFO. I am at the stage of laying the floor of the oven with fire bricks, and trying to plan ahead for when I finish the hearth and stand. I was hoping to use ceramic tiles surrounding the oven but I am concerned that if the oven expands this may crack the tiles. What is the normal method to finish the hearth above the vermiculite surrounding the oven? Any ideas would be appreciated. Also I am trying to work out final width of my 36 inch WFO, and refering to the Pompeii Oven Plans on page 13, 36 inch oven width column, what is the upper wall made of - insulation, finishing plaster etc???



  • #2
    Re: Thermal expansion

    I've heard of some ovens experiencing cracks around the arch and landing created by the expanding oven. Some builders recommend an expansion joint between the arch and the oven and between the floor and the landing. I build mine this way and haven't had any problems. It also reduces heat loss by conduction to the outer parts.
    Kindled with zeal and fired with passion.


    • #3
      Re: Thermal expansion

      Thanks for the reply David

      I was considering some form of expansion joint as you suggest. Sounds like a good idea.