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Cal-Sil Board specifications - more than one? - 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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Cal-Sil Board specifications - more than one?

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  • Cal-Sil Board specifications - more than one?

    I have been researching Cal-Sil Board sources and found a site that sells 2" thick board for $3.56 sqft. Looking at the specs (ASTM C 533, Type I) it shows a heat rating of 1200 degrees F (649 degrees C).

    The Cal-Sil Board sold in the FB store states a heat rating of 1200 degrees C (over 2400 F). (possible typo?)

    Now I suppose there are different grades or specifications of Cal-Sil Board. My question is, what floor temps are likely to be seen? ie if 1200 degrees F is completely adequate I can't see paying 3 times the price for board that will never come close to the temp rating possible.

    Thoughts?

  • #2
    Re: Cal-Sil Board specifications - more than one?

    This is a question for our multiple-thermocouple mavens. How hot does the interior of the firebrick floor get at full temperature? I'd guess it's well under 1200f
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Cal-Sil Board specifications - more than one?

      I think I'll repost under asking that very question. Thanks

      Originally posted by dmun View Post
      This is a question for our multiple-thermocouple mavens. How hot does the interior of the firebrick floor get at full temperature? I'd guess it's well under 1200f

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      • #4
        Re: Cal-Sil Board specifications - more than one?

        I have standard floor (flat bricks) and TC's with center of brick measurement. There is no way you are going to overheat the floor insulation on a normal pizza firing. The highest temps I have recorded for the floor mass was approx 450 degF. 1200 deg limit would be fine.

        What you need to look at is thermal coefficient as that is the more important number. You want the lowest number for your money. Also, some materials loose structural integrity when wet, so need to be aware of that.

        I used Insblock 19 under my floor at $1.00 sq ft for 1" thick. Haven't got any complaints.
        Wade Lively

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