web analytics
Natural Corbel Stone Dome on Casa 110 - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

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.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

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.

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!

Forno Bravo
See more
See less

Natural Corbel Stone Dome on Casa 110

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Natural Corbel Stone Dome on Casa 110

    Hello,
    We have just completed the insulating layer of vermiculite concrete on a casa 110 oven. As you can see I am coming up and over with natural stone. Question, if I put an additional 2 inch shell of portland sand over the 4' portland vermiculite, can then adhere my stone directly to the shell of the dome. I was told by the sales people (who should take a course on oven construction) that I need have a supportive structure over the dome to be able to dome over with stone. With this method, the stone is actually supporting itself as it corbels over the top, so the weight is distributed to the sides. Also, with this in mind, should I just veneer up and leave a gap to fill with loose vermiculite? Thanks to anyone who can help me with this.
    Best,
    Chuck

  • #2
    Re: Natural Corbel Stone Dome on Casa 110

    Chuck,

    Your questions are beyond my expertise, but your oven is going to be gorgeous! Someone will jump in with advice.

    Welcome to the forum!
    Ken H. - Kentucky
    42" Pompeii

    Pompeii Oven Construction Video Updated!

    Oven Thread ... Enclosure Thread
    Cost Spreadsheet ... Picasa Web Album

    Comment


    • #3
      Re: Natural Corbel Stone Dome on Casa 110

      Gorgeous stone work, please post more pictures as you go along. I don't see why you would need a support structure for the stone. Most of the weight should transfer vertically down through the stonework. Depending on how you finish it, there may be some sideward thrust, but the mortar should easily account for that. If you are confident that the mortared stonework would stand by itself as a hollow shell, then it is indeed a self-supporting corbel.

      Whether you finish it as a veneer or not is really a personal preference. If your oven has enough insulation already, then I'd prefer to mortar to the shell to provide extra safety margin against uncommon loading e.g. wind, accidental impacts, mortar defects, earthquakes, tornadoes, etc. But if you want to have another layer of vermiculite, go ahead.

      .

      Comment


      • #4
        Re: Natural Corbel Stone Dome on Casa 110

        Chuck,

        If you're confident with your stone work, it's probable that you don't need a support structure. If you decide to go that route, though, I would not use Portland/sand. Even for laying the stone as a corbel, I'd use Type N and sand, because it's stickier, not as rigid and stands up to water run off.

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

        Comment


        • #5
          Re: Natural Corbel Stone Dome on Casa 110

          chuck,
          as the others say, carry on corbeling over the dome as the weight is distributed to the base. If you've 4" of vermiculite that's absolutely plenty to keep the heat in. I'm not a great fan of Portland cement for stone work unless you mix Hydrated lime into the mortar or use just a NHL 3.5 Hydraulic Lime/ 0-4mm sand mix at 1 part lime to 2-3 sand. Its a much more forgiving mix and not as brittle as Portland.
          Its looking good!

          amrit

          Comment


          • #6
            Re: Natural Corbel Stone Dome on Casa 110

            Thank you to everyone who has replied to my questions. Just to clarify...I never had any intention of using portland for the stonework , my plan all along is to use type S, I was asking if I put a shell of portland mix over the 4"vermiculite insulation, would that be a good way to allow myself to veneer right to the shell?

            Comment


            • #7
              Re: Natural Corbel Stone Dome on Casa 110

              chuck, I don't think you need a separate layer as such, just backfill with mix as you corbel over unless your stone is very variable in thickness and your insulating mix is very uneven but it doesn't look like either is the case. If you've put a foil layer over the dome before insulating then that will act as an expansion joint so the layers subsequent should all be stable and independent of the dome movement. There's no fixed answer to these things so carry on and see what happens. I suppose you've just got to make sure the thing is water tight.

              Comment


              • #8
                Re: Natural Corbel Stone Dome on Casa 110

                This idea may be to late in coming, but what about a waterproof stucco coating under the stonework?

                Comment


                • #9
                  Re: Natural Corbel Stone Dome on Casa 110

                  I don't really know how you've finished things so far but I should think that if you make sure the stone joints are well filled and brushed off at the end of your work session, I doubt very much you'll get any rain penetration. If its going to worry you sick, stucco over before you start the stonework but I only say that because worry is the one thing you should avoid at all costs when doing anything new! In fact my life motto is " when you start worrying, you stop living".........
                  amrit

                  Comment

                  Working...
                  X