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Dome Installation Video - Casa / Premio / Modena

Hello,

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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Crack

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  • Crack

    After the massive fire. The dome itself was fine but I got a crack in my outer arch.
    Maybe 1mm between a brick on the left side of the arch and it's mortar joint on the uphill side. What I mean is, the mortar as a mass is intact but it's as if it has pulled away from the brick to leave a crack there.
    Seems still structurally sound but it's not nice to see. Like a zit on an otherwise nice face.
    Should I slather more mortar onto it or leave it be?
    Bob

    Always ready for pizza

    http://www.fornobravo.com/forum/memb...ing-build.html

  • #2
    Re: Crack

    Leave it....a mortar parge wont hold.
    Old World Stone & Garden

    Current WFO build - Dry Stone Base & Gothic Vault

    When we build, let us think that we build for ever.
    John Ruskin

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    • #3
      Re: Crack

      I got a very small hairline crack in mine when I first fired it, while its not a problem structurally it bugged the hell out of me.

      I racked out the joint to a depth of 5mm, moistened the joint and refilled it, it hasnt reappeared.
      The English language was invented by people who couldnt spell.

      My Build.

      Books.

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      • #4
        Re: Crack

        Originally posted by brickie in oz View Post
        I got a very small hairline crack in mine when I first fired it, while its not a problem structurally it bugged the hell out of me.

        I racked out the joint to a depth of 5mm, moistened the joint and refilled it, it hasnt reappeared.
        Ok thanks. It's as you said, if I just leave it be it is going to bug me forever. I think I will try your method and hope for the best. After you did that, how long did you wait, curing time, for your next firing?

        Bob
        Bob

        Always ready for pizza

        http://www.fornobravo.com/forum/memb...ing-build.html

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        • #5
          Re: Crack

          I also filled my small cracks - a few came back (but smaller than they were) and some never re-appeared. After that I stopped worrying about them and have had no issues!

          Comment


          • #6
            Re: Crack

            Originally posted by Filthymutt View Post
            Ok thanks. It's as you said, if I just leave it be it is going to bug me forever. I think I will try your method and hope for the best. After you did that, how long did you wait, curing time, for your next firing?

            Bob
            I think I just left it till the next firing which was probably a week or so.
            The English language was invented by people who couldnt spell.

            My Build.

            Books.

            Comment


            • #7
              Re: Crack

              Ok cool. I'll do the same. Thanks!
              Bob

              Always ready for pizza

              http://www.fornobravo.com/forum/memb...ing-build.html

              Comment


              • #8
                Re: Crack

                As with any portland cement based mortar or concrete mix, it will cure harder if you keep it wet/damp while it is curing (try to keep it damp for at least 3-5 days).

                Comment


                • #9
                  Re: Crack

                  I would not say anything, but the last statement pushes on of my buttons. Mortar and concrete are not the same thing. They do not share the same functions, only some of the same ingredients.

                  Normally with concrete you want the strongest concrete that is practical. This is NOT true with mortar. When doing a mix design for a mortar, you want the WEAKEST mortar that will suffice.

                  Concrete: High compressive and tensile strength.

                  Mortar: Weaker than the units being laid, high bond strength and flexural strength.

                  Comment


                  • #10
                    Re: Crack

                    Cracks in the outer decorative arch are not unusual in many builds. They are caused by a high difference in temp between the inner and outer surfaces of the arch's bricks, resulting in uneven thermal expansion. In addition actual expansion from the inner parts of the oven can also create physical outward pressure on the arch. Both conditions are reduced and cracks in the arch pretty much eliminated if the design incorporates an expansion joint/ heatbreak between the decorative arch and the inner oven parts.
                    Last edited by david s; 09-22-2013, 03:53 PM. Reason: Grammar
                    Kindled with zeal and fired with passion.

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                    • #11
                      Re: Crack

                      Originally posted by david s View Post
                      eliminated if the design incorporates an expansion joint/ heatbreak between the decorative arch and the inner oven parts.
                      Who has done that? The decorative arch is pretty much sitting at ambient temperature. Do you mean the dome and the vent/entry?
                      Check out my pictures here:
                      http://www.fornobravo.com/forum/f8/les-build-4207.html

                      If at first you don't succeed... Skydiving isn't for you.

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                      • #12
                        Re: Crack

                        Originally posted by Les View Post
                        Who has done that? The decorative arch is pretty much sitting at ambient temperature. Do you mean the dome and the vent/entry?
                        I for one, have heat breaks at both ends of the flue arch. I know there are others out there.
                        Chip

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                        • #13
                          Re: Crack

                          Originally posted by Les View Post
                          Who has done that? The decorative arch is pretty much sitting at ambient temperature. Do you mean the dome and the vent/entry?
                          Yes, that is the point. The outside of the arch is at ambient while the inside of it is getting hot. It is similar to an uninsulated flue tile which is likely to crack because one side is hot while the other side remains cool. Lots of ovens,Rado's from traditional oven and mine as well as many others are built this way. I meant between the outer decorative arch and the entry, but on both sides of the entry like Chip's is probably even better.
                          Last edited by david s; 09-22-2013, 05:43 PM. Reason: Clarification
                          Kindled with zeal and fired with passion.

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                          • #14
                            Re: Crack

                            Never seen a problem there. Mine is always cool enough to touch as the gasses have escaped up the vent. Since the brick doesn't conduct heat very well I think something else is contributing to the crack (bad masonry, shifting of the base...)
                            Attached Files
                            Check out my pictures here:
                            http://www.fornobravo.com/forum/f8/les-build-4207.html

                            If at first you don't succeed... Skydiving isn't for you.

                            Comment


                            • #15
                              Re: Crack

                              Yes actually it's not really getting hot, but it definitely didn't show until that first big fire. It is just a hairline, barely 1mm
                              Bob

                              Always ready for pizza

                              http://www.fornobravo.com/forum/memb...ing-build.html

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