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Pouring the hearth - 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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Pouring the hearth

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  • Pouring the hearth

    Just about to start construction and have a queary on the hearth. I thought about building the stand 5 blocks high and using the top row of blocks as the formwork for the structual and insulating hearth. I would lay 4 courses, put down a fibre cement sheet then put the last course on top. The reo bar would tie it all together and keep it stable. Could i then just use reo mesh in the 2 slabs for strength???

  • #2
    Re: Pouring the hearth

    Barnsey, That is kind of what I did. It worked out well for me. Good luck.



    • #3
      Re: Pouring the hearth

      Hi Barnesy,
      I was thinking about using the same method. Four bricks high and placing an 18mm compressed fibre cement sheeting between the fourth and fifth block then pouring in the concrete.

      Just wanted to know how you went with this.


      • #4
        Re: Pouring the hearth

        thats pretty much what i did as well,, see pics

        Last edited by ThisOldGarageNJ; 08-16-2010, 05:53 PM.


        • #5
          Re: Pouring the hearth

          Thatís a little different to what Iím thinking. It appears that you set the formwork above the last layer of bricks.

          What Iím thinking of doing is adding one more layer of bricks to act as the form work.


          • #6
            Re: Pouring the hearth

            For added security if I were doing something like this I would use narrower blocks (8x6x16) as the top formwork course so the entire slab perimeter would rest partly on the wider (8x8x16) blocks beneath.
            But I guess with enough rebars extending into the blocks themselves, that's more than adequate.
            Last edited by fxpose; 12-16-2009, 05:11 PM.

            My 34" WFO build

            Weber 22-OTG / Ugly Drum Smoker / 34" WFO


            • #7
              Re: Pouring the hearth

              I agree with fxpose.

              Unless your suspended structural slab is supported on the wall (2 inches should do it) it will shear at the wall face.


              • #8
                Re: Pouring the hearth

                Just what I was thinking guys. First four layers of 390x190x190 Besser blocks then on the Fifth Formwork layer a 390 x 90 x 190 block. That’s 100mm of overlay on the slab.

                The other option was to use decomposed granite instead of concrete, level, and then place 2” Calcium silica board then fire bricks on top. Might save some time.