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vermiculite granule size? - 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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vermiculite granule size?

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  • vermiculite granule size?

    Hello,

    This is my first posting. I live the Buffalo, New York area and am in the process of ordering vermiculite. Does the size of the granule matter? I have an option of large, medium, or fine. Thanks for any help you can give me.

    Rob

  • #2
    Re: vermiculite granule size?

    I would think the coarser the better, since you are trying to get air spaces between the concrete matrix. Also, the big chunks might be less dusty.

    Be sure it's the agricultural vermiculite, not silicone treated for use in domestic insulation. The silicone makes it hard to combine into insulating concrete.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: vermiculite granule size?

      Hi Rob, I have just poured my foundation and topped it with 100mm vermiculite which was graded as "#3 exfoliated vermiculite". It says on the 6Kg bags that it is for horticulture and insulation and the company seels heaps of it to people such as us for our ovens.
      A picture of the mix is on; fornobravo.com/forum/f8/neills-pompeii-1-a-2005.html
      It was mixed between 5 and 6 : 1 with portland cement and has set off nicely over the past week

      Neill
      Prevention is better than cure, - do it right the first time!

      The more I learn, the more I realise how little I know


      Neillís Pompeiii #1
      http://www.fornobravo.com/forum/f8/n...-1-a-2005.html
      Neillís kitchen underway
      http://www.fornobravo.com/forum/f35/...rway-4591.html

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