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pompeii oven construction began today - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

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.
- 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.

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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pompeii oven construction began today

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  • Hey Russell who is getting 10 days?. Best I have done was 5 days having heated it to 550c after a pizza cook. Keep it going until I get outside brick temp of 400 and inside of 480 or more, take fire out seal and it equalises at 440, from there drops about 40 - 50c deg per day. A little faster if the door is taken off to much. I tend not to use it if it drops below 100c. would love to get next one to maintain for 7 days then it would heat up quicker for pizza on Friday nights.

    My next oven I am going to double the insulation I used on this one. around and under.


    Last edited by oasiscdm; 01-31-2016, 04:06 AM.
    Cheers Colin

    My Build - Index to Major Build Stages

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    • Maybe 10 days is a stretch for "cooking" heat but here is the link of claim to fame by Randy J.

      http://www.fornobravo.com/community/...?r=5539921&p=2
      Russell
      Build Link............... Picassa Photo Album Link

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      • I would also say that it is pretty much a stick and move process. And if you have the mortar just right and the bricks properly wet you can make it a little farther up the dome. I was either lucky or dumb but I did mine like that all the way to the top. As soon as I had 3 bricks in it seamed to hold ok.

        As for insulation the Moro the better. I used 4" of ceramic board from McGills warehouse under the oven. Then I did 3" of ceramic blanket over the top of the dome and filled the enclosure with 36 cf of vermiculite over the top of the insulation. I also did heat breaks at the dome to vent ant floor to vent. AlSo I put paver stones under everything that acts as drainage if it should get wet.

        I am seeing temps around 700F floor and 750F dome the next day the next day will be mid 600F range somewhere. With the insulating door in place it will take up to 10 days to cool to under 100F I normally do a batch of bread on day 2 or 3 but nothing past that yet. Note this is with outdoor temps below freezing and sometimes well below 0. I am very happy with how it turned out.

        Randy

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        • Originally posted by UtahBeehiver View Post
          2. What do you consider slow heat-up? 2-3 hours for a white dome is not uncommon. Insulation has changed over ten years, recent rule of thumb is that CaSi board or blanket is twice as efficient as P or Vcrete. So most recently, a min of 2" CaSi is recommended under the floor with 3-4" better. This mean 4" min P or Vcrete or 6-8" optimal under the fire brick floor. Maybe the 2.75" of Pcrete (1.375" equiv. CaSi) under the old oven was not enough floor insulation so the concrete base acted as a heat sink which I guess in a sense too much thermal mass. My oven has 3.5" of CaSi and FoamGlas under the 3" thick firebrick floor, 3" of ceramic blanket and 3" of Pcete on the dome. IMHO, insulation is a key component to a high efficient oven. The new generation ovens are getting 4-5 days of workable cooking heat. One recent oven builder is saying they are getting 10 days.

          The floor insulation is something that has obviously changed. The plans when I build this oven called for a concrete hearth directly beneath the floor bricks, with pcrete under that. If you look through my thread you'll see where I suggested flipping that, with the floor bricks being the only thermal mass in the bottom. Glad to see that is the norm now.
          -Paul
          overdo it or don't do it at all!

          My 2005 pompeii build

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          • Originally posted by paulages View Post


            The floor insulation is something that has obviously changed. The plans when I build this oven called for a concrete hearth directly beneath the floor bricks, with pcrete under that. If you look through my thread you'll see where I suggested flipping that, with the floor bricks being the only thermal mass in the bottom. Glad to see that is the norm now.
            It all depends on what you want your oven to do. For a bread oven a very thick dense floor is good because high temperature wicks away into the cooler part of the floor. This results in more heat storage and a reduced tendency to burn the bottoms of bread loaves. You can do multiple loads of bread without the temp dropping off so fast. The downside is that it is really difficult to keep the heat high enough in the floor for continuous pizza cooking and the oven takes longer to heat up initially.
            Kindled with zeal and fired with passion.

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