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Curing - Forno Bravo Forum: The Wood-Fired Oven Community

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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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Dome Installation Video - Casa / Premio / Modena

Hello,

For many of you who bought a modular oven, you may have asked how we put the domes together when we build them. For those of you considering one of our ovens, we shot a video to make your install easier.

Check it out on our You Tube Channel.

https://www.youtube.com/watch?v=-7q7...jSniYogfUra06Q

If the link doesn't work, simply go to You Tube and type Forno Bravo Channel. The video title is How to Set your Forno Bravo Oven Dome Pieces.

Thanks for participating in our Forum. We will have more video content available soon.
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Curing

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  • Curing

    We are getting close to finishing the dome. I have been reading about the curing process. I understand that it is crucial that you slowly eliminate mositure
    by a succession of slow fires increasing the temp over a period of time. Heat turns the water to steam and if done too fast the only result will be bursting through mortar joints and brick. Now I have read first cure then render. We are going to put 1.5" to 2" of Heat Stop over the dome, put up walls and pour 6" of vermiculite inside. Now when one says render do you mean the Heat Stop layer over the dome? I would think that you want to cure after this layer and before the addition of the vermiculite. If not it would take forever to cure. The vermiculite out of the bag is dry. I'm coachable.
    G

  • #2
    Re: Curing

    We are going to put 1.5" to 2" of Heat Stop over the dome, put up walls and pour 6" of vermiculite inside. Now when one says render do you mean the Heat Stop layer over the dome?
    This layer of additional thermal mass is quite optional. It will take longer to heat up and cool down, and of course be more masonry to cure. "Render" is the UK/Aus expression for what we call stucco, and most often refers to the coat over the insulation in igloo finished ovens.

    Now as far as insulate before or after: I'm in favor of insulation before curing fires, here's why: I think most of the cracking problems come from temperature differential between the hot inside and the cool outside, and having insulation makes for less thermal shock. That said, lots of people cure before insulation, it's a matter of choice.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Curing

      The render referred to is the brown coat, scratch coat and final stucco layer on an igloo style build. You have a gable style enclosure with loose vermiculite. Go ahead and cure. The vapor will escape into the insulation but will dry out with the heat of curing.

      Mark

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      • #4
        Re: Curing

        I finished my oven, the vermicrete over the dome, I waited ten days had my 7 curing fires and then started cooking. I used surface bonding cement(rather than stucco, adding acrylic fortifier and color after about a month. The surface bonding cement worked great and was easy to use and according to Quickrete is waterproof (the acrylic makes it waterproof)and will withstand the minor exterior heat. I also used the suface bonding cement on the block foundation. Much easier to use than mortar.

        Are you insulating your oven ? or are you planning on using the heat stop as insulation ? that stuff is EXPENSIVE. I put whatever I had leftover on the dome after I was done laying for the day, a thin coat...

        Good luck and enjoy
        Mark

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        • #5
          Re: Curing

          Thanks for all the responses.
          To Mark's question:
          The Heat Stop is $50.00 per 50lb bag and we are going to get one bag just to slather it on the outside of the dome. We have allowed for 6" of vermiculite which we feel is more than enough. A lot cheaper than the blanket. We are looking forward to doing the finish work and are forcing ourselves to be patient.
          G

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          • #6
            Re: Curing

            I insulated with 5 inches of 12:1 vermiculete then two layers of acrylic stucco - finished off the vent, chimney and everything before starting the curing firings.

            My insulation shell is vented through the acrylic stucco with 1 inch vents at four places on the bottom and once at the top.
            Last edited by Neil2; 08-03-2009, 01:15 PM.

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