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Perlite equal to Vermiculite? - Forno Bravo Forum: The Wood-Fired Oven Community



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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Perlite equal to Vermiculite?

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  • Perlite equal to Vermiculite?

    Can I interchange perlite with vermiculite in oven applications?

    Does Perlite work as well for the insulation slab under the firebricks?

    Any tricks for mixing with concrete?

  • #2
    Re: Perlite equal to Vermiculite?

    "Can I interchange perlite with vermiculite in oven applications?"

    Yes. Go for the "course" grained perlite.


    • #3
      Re: Perlite equal to Vermiculite?

      Mix perlite more gently than you would vermiculite. It is prone to breaking down to smaller and smaller particles during mixing. Other than that, they're basically equivalent.

      Website: http://keithwiley.com
      WFO Webpage: http://keithwiley.com/brickPizzaOven.shtml
      Thread: http://www.fornobravo.com/forum/f21/...ttle-7878.html


      • #4
        Re: Perlite equal to Vermiculite?

        I used perlite and like the fact that the white color lets you know when it's fully mixed with the portland. But yes, they both work. You can either mix the dry ingredients and carefully trowel in the water, or mix the water and portland into a slurry and mix in the light stuff. This technique needs a mixing paddle in a power drill to mix the slurry.
        My geodesic oven project: part 1, part 2


        • #5
          Re: Perlite equal to Vermiculite?

          Great! We have already bought 3- 4cu/ft bags, hoping it would work.

          How thick of layer do you think would be appropriate for a oven floor of 4 1/2 firebrick, the brick are 4 1/2 X 3-6 in X18 long, and overall oven dimensions (inside) of 28 X 36?




          • #6
            Re: Perlite equal to Vermiculite?

            four inches


            • #7
              Re: Perlite equal to Vermiculite?

              If you're mixing in a wheel barrow - add the water slowly.

              If you just dump half a bucket of water in - the Perlite will fly out of the barrow and go everywhere!!

              (don't ask me how I know...)
              My 2nd Build:
              Is here


              • #8
                Re: Perlite equal to Vermiculite?

                Mix gently. Try to avoid breaking down the perlite particles.