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Perlite Ratio - 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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Perlite Ratio

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  • Perlite Ratio

    Hello everyone

    What is the ratio of perlite, cement, and sand to build a pizza oven dome?
    What is the thickness required to build the dome before the layer insulation?



    Thanks

  • #2
    Re: Perlite Ratio

    Originally posted by Shay View Post
    Hello everyone

    What is the ratio of perlite, cement, and sand to build a pizza oven dome?
    What is the thickness required to build the dome before the layer insulation?



    Thanks
    If you build the dome with perlite in the mix it will not be dense enough to store heat.
    Generally the dome thickness is between 2-4" thick depending on the materials used.
    Suggest you download the free plans or read lots of build threads to get a better idea of design principles.
    Kindled with zeal and fired with passion.

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    • #3
      Re: Perlite Ratio

      Thanks

      I have just design and built the first arc already (attached a picture)
      Now I have to build the rest of the oven and I wanted to build from perlite and cement
      But I do not know about the right ratio
      Last edited by Shay; 09-22-2012, 05:34 AM.

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      • #4
        Re: Perlite Ratio

        Like David said, you cant build an oven out of perlite and cement, it just wont work.
        The English language was invented by people who couldnt spell.

        My Build.

        Books.

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        • #5
          Re: Perlite Ratio

          if so what are my options instead if I do not want to
          build from bricks?

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          • #6
            Re: Perlite Ratio

            Use a dense castable refractory. Search the forum for this material and read all you can. You can buy the stuff from a refractory supplier.
            Kindled with zeal and fired with passion.

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            • #7
              Re: Perlite Ratio

              Perlite and its neighbour Vermiculite are insulators, and wont hold heat. As David S mentioned use a Refractory dense castable, a 1350c grade is most likely the easiest and cheapest option. approx $25-$30/25 kg bag.Dont know the size of your oven, but if you calculate the volume of the prefered dome, you can use the 80 bags/m3 figure to work out your requirement, or if your old like me, 2 bags/Ft3. THEN use your Perlite mix over that dome to keep the heat in.

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