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Quest. re Aluminium inter layers. - Forno Bravo Forum: The Wood-Fired Oven Community

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New Forno Bravo Forum Feature

Forno Bravo Forum Community,

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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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.

Check it out on our You Tube Channel.

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

If the link doesn't work, simply go to You Tube and type Forno Bravo Channel. The video title is How to Set your Forno Bravo Oven Dome Pieces.

Thanks for participating in our Forum. We will have more video content available soon.
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Quest. re Aluminium inter layers.

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  • Quest. re Aluminium inter layers.

    I read on FB tonight that Al should not be used amidst vermiculite in dome insulation as it inhibits water vapour transfer.
    My thought is that the temperatures at which these ovens operate will prohibit significant water vapour ingress in the first instance.

    I would love to hear your experiences/comments.

    My brick shell is covered with 2" [see, I'm learning, Cousins: 50mm indeed!!] of concrete/sawdust admixture.Next comes Al insulating sheets, to be followed by 25mm ceramic blanket. In turn, this will be encased by roughly 3" of vermiculite, contained in Al ceiling insulation batts. (Photos to follow, tru).
    The final shell wiil grade from light-weight concrete (probably vermiculite based, but possibly straw/sawdust), to high-strength concrete.
    Final cosmetic layer remains undecided: advice welcome, eh.

    So place your bets Fellers: Pass or Fail?
    Tickets are a cent a piece: buy up big and raise yer chances!!! hahaha.

    I'll post my opinion after the first test, although a definitive result may not emerge within thirty years. And I sure as hell won't be here to run that revue, eh.

    Stay good you mob.
    Jeff.

  • #2
    Re: Quest. re Aluminium inter layers.

    My bet? It'll be fine. I don't think the aluminum will help, but I don't think the water vapor retention issue is significant once the oven dries out from construction.

    In house insulation the vapor barrier is there because the interior is more humid than the exterior, and it keeps the insulation dry. Once you are above 212f (100c) retained humidity is about zero. Any H2O from the fire or dough is quickly exhausted up the chimney.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Quest. re Aluminium inter layers.

      Thanks Dmun.
      One post - One reply.
      Quality beats quantity most days, eh.

      So all, (bar the enclosing dome), is done. Ended up with 75% of surface area having 2" blanket coverage. (Bought a 7600 roll [what's that? 25' maybe? ]of 1"; put on a layer of loose vermiculite to fill the gaps. Vermiculite 'tiles' over that, more loose fill, cover it all with foil, and lay on a light scratch coat of "stuff"* to hold it all in place and provide a key for the final shell.
      Warm (min 22 celcius) and raining here at present -perfect curing weather for concrete.
      Tomorrow or the next day should see the last of the functional bits done 'n dusted; then the aesthetics: yuk! I lack imagination, please help.
      Jeff.
      * cement:lime:sawdust:brickies loam - 1:1:4:2. [approx, hahaha, so who cares?]. jh.

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      • #4
        Re: Quest. re Aluminium inter layers.

        [approx, hahaha, so who cares?]
        No, really, we like to hear about this stuff. I wouldn't recommend anyone make mortar out of sawdust, but if you do, we want to hear how it works. That's after all how they make insulating firebrick, by mixing sawdust with refractory clay before firing.

        So a couple of questions. What's brickie loam? Loam means topsoil here in the US. And what are vermiculite tiles? Is that compressed vermiculite board that used to be used for soldering pads? Got a picture or a data sheet link?
        My geodesic oven project: part 1, part 2

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