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insulating question - Forno Bravo Forum: The Wood-Fired Oven Community



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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insulating question

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  • insulating question

    I am asking questions a little ahead of time because I pour my hearth this Sat...
    But After I build my oven I plan to wrap it with an insulating blanket...

    Then I plan to build a gable style enclosure.... Should/DO I still need to fill that enclosure with additional material...
    If I do won't that compact down the insulating blanket and reduce its insulating properties?

    Thx in adavance... I am getting closure to great Pizza everyday!

  • #2
    Fill the enclosure with vermiculite

    I have blanketed my oven in insulfrax and when I build the gable house around it, I will l line the walls with fiberfrax board and fill the entire inside with verimiculite.

    Vermiculte won't compress the blanket. It weighs next to nothing.
    There is nothing quite so satisfying as drinking a cold beer, while tending a hot fire, in an oven that you built yourself, and making the best pizza that your friends have ever had.


    • #3
      Enclosure walls

      Hey Fio,

      If you have a 1" Insulfrax blanket and 4" +/- vermiculite around that, you really don't need anything thermal for your enclosure walls. The heat just won't get that far. You can build the upper walls from brick, block or metal stud and concrete board, and they will barely get hot.

      That would save you some time and money.

      Pizza Ovens
      Outdoor Fireplaces


      • #4


        Do you pour the vermiculite on top of the insulating blanket also?

        For just a simple backyard oven mainly cooking pizzas, sometines bread and chicken how much do I need?

        PS Thx.. I got my Super Isol today! that was Fast!


        • #5
          Yep. Vermiculite over the Insulfrax

          You can add the vermiculite right over the blanket. You can do it three ways:

          1. For a house enclosure, just pour it in. Simple.
          2. For an Igloo, you can build your wire structure, put on the scratch coat of stucco (leaving a small window) and pour the vermiculite in.
          3. For an Igloo, you can mix the vermiculite with Portland cement to get a light castable insulating concrete and add that right to the insulfrax layer. It's crumbly, so you need to work to get the form right and you can use your stucco lathe to hold it in place.

          In general, vermiculite is light and pretty easy to work with.

          Hope this helps.
          Pizza Ovens
          Outdoor Fireplaces