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Vermiculite insulating base questions - Forno Bravo Forum: The Wood-Fired Oven Community

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Dome Installation Video - Casa / Premio / Modena

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For many of you who bought a modular oven, you may have asked how we put the domes together when we build them. For those of you considering one of our ovens, we shot a video to make your install easier.

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https://www.youtube.com/watch?v=-7q7...jSniYogfUra06Q

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Vermiculite insulating base questions

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  • Vermiculite insulating base questions

    I am mounting my oven onto a trailer, I am about to cast the concrete slab (2") and then the Vermiculite concrete insulation slab. My question is this, How strong is Vermiculate concrete (Movement etc) And will the concrete be spongy? It has to be firm and strong to take the oven and keep the segmented floor level and in place, Thank you

  • #2
    Re: Vermiculite insulating base questions

    You can make it stronger by adding more cement, but as the table shows the more you add the less it will insulate. you may need to therefore increase the thickness. Adding sand really boosts the strength, but also really reduces insulation.

    Vermiculite Insulating Concrete--The Schundler Company
    Last edited by david s; 04-11-2012, 01:42 PM.
    Kindled with zeal and fired with passion.

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    • #3
      Re: Vermiculite insulating base questions

      And the compressive strength is probably about the same too.
      Kindled with zeal and fired with passion.

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      • #4
        Re: Vermiculite insulating base questions

        Given you are mounting it on a trailer, is it safe to assume you're building a portable oven for a business or something?

        If you're using the oven for something like that, you might not care as much about heat retention overnight, so you're more willing to trade off heat loss for rigidity
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        • #5
          Re: Vermiculite insulating base questions

          I laid the vermiculite base today, 3" of Vermiculite concrete sitting on 2" strong concrete. I had trouble getting the Vermiculite at a good level finish, What is best to put between the vermiculite concrete and the oven floor to keep everything level? Thank you

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          • #6
            Re: Vermiculite insulating base questions

            50/50 sand and clay, throw in some lime if you want it stronger.
            Kindled with zeal and fired with passion.

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            • #7
              Re: Vermiculite insulating base questions

              Originally posted by david s View Post
              50/50 sand and clay, throw in some lime if you want it stronger.
              probably a silly question but do you put that on dry or with water?

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              • #8
                Re: Vermiculite insulating base questions

                Some people do it dry and just settle the firebricks in getting them nice and level. I prefer to do it wet. You can also do it wet, get a good level surface, let it dry then place the bricks.
                Kindled with zeal and fired with passion.

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