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has any one used calcium silicate board - 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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has any one used calcium silicate board

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  • has any one used calcium silicate board

    looks like chalk, rated to 1100 degrees
    Will this hold up under the weight of the oven ...
    I was thinking of using it under the firebrick floor for insulation
    $4 per sq ft. (2"thick)


  • #2
    Re: has any one used calcium silicate board

    Cal-sil board is the generic name for the super-isol board sold by FB. It's the best under oven insulation.
    My geodesic oven project: part 1, part 2


    • #3
      Re: has any one used calcium silicate board

      Berryst, lots of people here are using the boards, but there are several types and thicknesses. Do a search here for cal-sil, super-isol, Kaowool, Insblok, and tried-and-true FB Board, to name the most common, and you'll find lots of discussions. I think some people calculated that the oven exerts about 2 psi on the hearth, so that shouldn't be an issue in most cases. Getting them wet is a concern for some (like the kaowool - see this post).
      Picasa web album
      Oven-building thread


      • #4
        Re: has any one used calcium silicate board

        I have given up on calcium silicate board. My oven will be underground in the pacific Northwest. Rain is a daily affair all winter. I drove 70 miles and bought perlite. The seller says that the call for perlite is down as consumers are not building fire places. Thanks to all who replied