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Insulating concrete vs Homebrew Fireclay Mortar - 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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Insulating concrete vs Homebrew Fireclay Mortar

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  • Insulating concrete vs Homebrew Fireclay Mortar

    Hi. After my son and my 3rd summer of working on this, we finally finished the dome (whew!) and have laid the insulating blanket and started on the layer of insulating concrete to cover the blanket. My question is this (and I've looked all over the PDF plans as well as the forum for an answer); before I go out and purchase more materials for the homebrew mortar, is insulating concrete a different product?

    Many thanks in advance for your feedback,

    Heather

  • #2
    Re: Insulating concrete vs Homebrew Fireclay Mortar

    Insulating concrete, or more commonly called Vermicrete is a mix of vermiculite and cement. You can use perlite if you can't find vermiculite.

    Ratio is 5:1 for the parts that need structural functions, all the way to 20:1 for the dome insulation.

    M.

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    • #3
      Re: Insulating concrete vs Homebrew Fireclay Mortar

      Fantastic! That will be so much easier. So, to confirm, 1 part of concrete to 20 parts vermiculite for covering the insulating blanket, then? Our plan was to finish with stucco or adobe.

      Many thanks, H

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      • #4
        Re: Insulating concrete vs Homebrew Fireclay Mortar

        Originally posted by HConrad View Post
        Fantastic! That will be so much easier. So, to confirm, 1 part of concrete to 20 parts vermiculite for covering the insulating blanket, then? Our plan was to finish with stucco or adobe.

        Many thanks, H
        No. 1 part of cement, not concrete.

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        • #5
          Re: Insulating concrete vs Homebrew Fireclay Mortar

          Right! Sorry - I was on my way out the door and was not thinking clearly. Again, many thanks! H

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          • #6
            Re: Insulating concrete vs Homebrew Fireclay Mortar

            If you use 20:1 you may have trouble with it not being firm enough. It only needs to be strong enough so that you can stucco against it. It will depend how thick you make the layer too. I find 10:1 works pretty well.
            Kindled with zeal and fired with passion.

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            • #7
              Re: Insulating concrete vs Homebrew Fireclay Mortar

              Thank you so very much! I really appreciate the feedback.

              -H

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