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1" of Thermal Mass VS. 1" of Insulation

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  • #16
    Re: 1" of Thermal Mass VS. 1" of Insulation

    Originally posted by james View Post
    You can still do a thin coat to seal up the oven, and give it a little structural integrity. You can just put it on with a trowel -- no heavy lifting.
    James
    So the cladding IS structurally necessary (or advisable)?
    "Building a Brick oven is the most fun anyone can have by themselves." (Terry Pratchett... slightly amended)

    http://www.fornobravo.com/forum/f8/p...pics-2610.html
    http://www.fornobravo.com/forum/f9/p...nues-2991.html

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    • #17
      Re: 1" of Thermal Mass VS. 1" of Insulation

      I would put adding thin coating in the advisable category. Definitely nothing thick or heavy. It does not take a lot of time, or material -- and I can't think of a negative.

      You will patch up any potential cracks, or spots that might leak a little hot air or smoke.

      Would our experiened builders agree with that?

      James
      Pizza Ovens
      Outdoor Fireplaces

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      • #18
        Re: 1" of Thermal Mass VS. 1" of Insulation

        Hey James,

        Thanks for the info.

        I will probably add a bit to the outside, but do I really need the lime in the mix?

        I hate that stuff.

        I made one small batch without it, and it seemed to work fine.
        I actually couldn't tell the difference.
        My thread:
        http://www.fornobravo.com/forum/f8/d...ress-2476.html
        My costs:
        http://spreadsheets.google.com/pub?k...Xr0fvgxuh4s7Hw
        My pics:
        http://picasaweb.google.com/dawatsonator

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        • #19
          Re: 1" of Thermal Mass VS. 1" of Insulation

          I hope our pro masons can help out, but my understanding is that lime is for workability, not heat resistance -- which comes from the fireclay.

          Is that right?
          James
          Pizza Ovens
          Outdoor Fireplaces

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          • #20
            Re: 1" of Thermal Mass VS. 1" of Insulation

            James,

            My understanding has always been that lime is used for added workability and stickiness. That's why I often use Type N with Lime (says that on the bag) when working on outdoor vertical surfaces.

            Jim
            "Made are tools, and born are hands"--William Blake, 1757-1827

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            • #21
              Re: 1" of Thermal Mass VS. 1" of Insulation

              The type N is very sticky stuff, CJ recommended it when I was doing my weather seal coat before tiling. As Jim says - it is great stuff for vertical surfaces, stays in place with no sagging.

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