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Vermiculite Info - 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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Vermiculite Info

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  • Vermiculite Info

    Is the vermiculite I would use as an insulator, the same stuff you can buy in the lawn and garden deptartment or is it something else. Where can I get it at? Thanks

  • #2

    Welcome aboard,
    That's it. You can find vermiculite at some Home Depot stores, and at wholesale garden supply stores, in 4 cu. ft. bags. Don't buy it in small bags, or it will add up.

    Here are a couple of useful links:



    For Under Oven insulation, you might want to consider Super Isol, a rigid insulating board.


    Pizza Ovens
    Outdoor Fireplaces


    • #3
      I found my vermiculite and perlite at a hydroponics supply store. I just finished the insulating hearth today. It took just over four bags ($100) of perlite and about three hours (including start up and clean up) to cover the entire hearth.

      In hindsight, the SuperIsol would have been a better use of my time, but I'm having fun trying to do my first oven as cheaply as possible (but no cheaper).

      I'm building a Pompeii Oven in Austin, Texas. See my progress at:
      Il Forno Fumoso


      • #4
        I was horified by the first little batch of pearlite concrete I mixed up to go under my fireplace floor. What is this mess, I thought, but it hardened up to a really solid surface. The edges of it don't have any kind of hardness, but they don't fall apart, and it will all be covered up in my plan anyway.
        My geodesic oven project: part 1, part 2


        • #5
          If Perlite is used, then be sure it is agricultural grade!

          Originally posted by OvenBoy
          Is the vermiculite I would use as an insulator, the same stuff you can buy in the lawn and garden deptartment or is it something else. Where can I get it at? Thanks
          (M) If you decide instead to use Perlite rather than Vermiculite, be sure that the Perlite is agricultural grade. The construction grade is coated with silicon and is *not* what you want. In mixing Perlite as an aggragate, it needs to be able to absorb water!


          "Everything should be made as simple as possible, ...
          but no simpler!" (Albert Einstein)