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Ashes between the floor stones - Forno Bravo Forum: The Wood-Fired Oven Community

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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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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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Ashes between the floor stones

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  • Ashes between the floor stones

    Hello,

    I have build a very simple WFO about a year ago with the intention that if I liked it, I would build a permanent WFO.

    With this first build I found myself having one problem. I did not mortar the floor (like nobody does) but with the floor getting hot and cooling down and the stones shrinking and expanding every time, I now have ashes between the stones. The stones where simply lined up against eachother, not in a heringbone struckture or anything. The rest of the oven was build on top of these stones.

    It is not a very big problem but is there any way to prevent this from happening ? Normaly I would say mortar the stones to the support that I build but it seems to be common practice to just put the stones in a small bed of sand and not mortar them.

    Thanks in advance

    (excuses also if this question has come up before but I tried searching but could not find anything)

  • #2
    Re: Ashes between the floor stones

    Originally posted by nachtwacht View Post
    Hello,
    With this first build I found myself having one problem. I did not mortar the floor (like nobody does) but with the floor getting hot and cooling down and the stones shrinking and expanding every time, I now have ashes between the stones. The stones where simply lined up against eachother, not in a heringbone struckture or anything. The rest of the oven was build on top of these stones.
    Not sure what the problem is, are the ashes in the joints affecting your pizza or bread?
    Last edited by Bec1208; 04-29-2013, 07:57 PM. Reason: Grammar
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    sigpic “In theory, theory and practice are the same. In practice, they are not.” ― Albert Einstein

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    • #3
      Re: Ashes between the floor stones

      Gudday
      The term "stones" has me wondering do you mean "brick".
      Most of the ovens I have experience with have firebrick as the hearth material. It's an industrial material so they are exact in shape and size. Layed on a clay and sand slurry they are flat with no gapes.If you are considering a new oven consider the forno plans its a well proven oven.
      Regards dave
      Measure twice
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      Fit in position with largest hammer

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      • #4
        Re: Ashes between the floor stones

        nachtwacht,

        You are correct in not mortaring the floor. It should be free to expand and contract. But there are limits, you do need to contain the perimeter or they may shift to extremes.
        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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        • #5
          Re: Ashes between the floor stones

          Hello, thanks for the reply's.

          Fortunatly the ashes are not affecting my pizza's because the ashes are between the joints. However, since the stones keep expanding and contracting the joints are becomming bigger and bigger forcing the stones to go outward a little more and more every time. (That might be another reason why to use a heringbone basicaly is my question.....)

          "Stones" are firebricks indeed. Sorry for the confusion. They are fairly big ones. (11,7 inch long)


          Greetings

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          • #6
            Re: Ashes between the floor stones

            Originally posted by nachtwacht View Post
            but is there any way to prevent this from happening ?
            The only way would be to not light a fire, it happens to all black ovens.
            The English language was invented by people who couldnt spell.

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