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insulation board over vermicrete - 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.
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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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insulation board over vermicrete

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  • insulation board over vermicrete

    Hi
    If I was to use insulation boards over the vermiculite concrete layer (to improve the insulation effect), do I need to glue or mortar the boards to the vermicrete? If so, what is the material to use?

    Also, do you spread an underfloor paste of sand and fireclay over the boards if you are laying down a modular refractory concrete floor as opposed to a brick floor?

    Thanks in advance.

  • #2
    Re: insulation board over vermicrete

    Originally posted by mieno View Post
    Hi
    If I was to use insulation boards over the vermiculite concrete layer (to improve the insulation effect), do I need to glue or mortar the boards to the vermicrete?
    Easy answer: No. You are going to build a 1500 pound on top of the board. Gravity will win .

    Also, do you spread an underfloor paste of sand and fireclay over the boards if you are laying down a modular refractory concrete floor as opposed to a brick floor?
    I'll let someone else take that question.
    Ken H. - Kentucky
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    • #3
      Re: insulation board over vermicrete

      Also, do you spread an underfloor paste of sand and fireclay over the boards if you are laying down a modular refractory concrete floor as opposed to a brick floor?
      No. The fireclay/sand layer is for leveling the brick floor if you are laying it on an uneven surface, like vermiculite concrete.
      My geodesic oven project: part 1, part 2

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      • #4
        Re: insulation board over vermicrete

        Not that this is a normal way to do it, I used regular mortar to install my insulation board over the concrete. I didn't feel it would move in the future but had a concern during construction, also my board came 12" x 12".
        I used a wet fireclay/sand mixture to place my firebrick floor, but with our winter winds that dried our to fast. When I was mortaring down my first soldier row I didn't notice that I readjusted the floor slightly, so I have a couple of gaps I'll fill with with the dust from sanding the floor down. If I had to do it again I would use a little refractory mortar to place the floor.
        for what it is worth
        RCLake

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