web analytics
Assembling Cal Sil insulation - Forno Bravo Forum: The Wood-Fired Oven Community



Forno Bravo Forum Thread Message

Hello, Forno Bravo Community Forum Members!

The Forno Bravo team has heard the feedback in regards to the community forum. We wanted to take the time to re-enforce our commitment to a fully engaged Forum with professional moderation.

Our top priority as a company is to fix all forum errors and issues that you are experiencing. As we are swiftly working on these problems, we want to say that we highly value the Forum Bravo Community Forum and every single community forum member.

We have set up this thread so that every member can address any concerns, issues and questions about the forum. Please feel free to ask whatever you would like in regards to the forum; let us know what issues you are experiencing so we can work on resolving them as fast as possible. However, we stress that we would like constructive engagement, so please be specific about the issue you are experiencing.

Thank you for all of your patience and continued support.

Link to topic: http://www.fornobravo.com/community/...with-new-forum
See more
See less

Assembling Cal Sil insulation

  • Filter
  • Time
  • Show
Clear All
new posts

  • Assembling Cal Sil insulation

    Hi to everyone.

    My question is do I need to bond together the Cal Sil insulating sheets under my oven floor, or just place them flush against beach other? The boards are 1000 mm x 610 mm, so there will be some seams under the floor.

    I will be pouring a 4" vermiculite hearth, plus the 2" insulating boards on top. My oven floor will consist of 12" x12" x 2" refractory tiles. My understanding is the Calsil can sit directly on the vermiculite, and the oven floor can sit directly on the Calsil.

    I have also been reading many discussions regarding more or less thermal mass in the oven floor, heat up times, loss of floor heat etc.
    With the help of some sound contributions to the forum, I have concluded:

    Because I will have both Vermiculite and Cal Sil insulation, I should not lose too much heat from the slightly thinner 2" floor, and I should also get the floor temp up quicker. Also there will be less seams, therefore less gaps for heat loss? Does this make sense??

    All the best

  • #2
    Re: Assembling Cal Sil insulation

    You are correct with that insulation you are more than fine at the bottom...I put only 2" boards on top of the heart.
    I would not worry about the joints, if you need just level the boards with some fire clay.
    Ciao Carlo

    Cost spreadsheet updated 4/22/08

    Pictures updated 5/28/08


    • #3
      Re: Assembling Cal Sil insulation

      Thanks very much. I will post some photos soon on my progress to date - next to do is put the floor down and start building!

      All the best


      • #4
        Re: Assembling Cal Sil insulation

        Just as a side note, yesterday I had a very hot fire in my oven, burning some scrap lumber. After dinner I noted that my landing, which is a bracket supported piece of two inch slate was very hot to the touch, as well as the arch over the opening, but the slab under the oven floor was still cool to the touch.

        This is with 2.5 inch insblock19, which is not supposed to be as good an insulator as cal-sil.
        My geodesic oven project: part 1, part 2