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Question - Mortar over brick dome - Forno Bravo Forum: The Wood-Fired Oven Community

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Question - Mortar over brick dome

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  • Question - Mortar over brick dome

    Is there an advantage realized from covering the brick dome with mortar (I realize that it will add some thermal mass - which could be good or bad)?

    I've seen countless photos of domes done both ways. I just cannot find any pros/cons information for this step.

    I plan to tuck point all of my joints with mortar, then cover the dome with ceramic blanket and loose vermiculite (inside a dog house enclosure). Just wondering about the mortar coating between the brick and ceramic blankets...

  • #2
    Re: Question - Mortar over brick dome

    As I did each course, any surplus mortar I used to cover the previous dome work. Just a good way to use up the extra mortar rather than just waste it.
    Russell
    Build Link............... Picassa Photo Album Link

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    • #3
      Re: Question - Mortar over brick dome

      Originally posted by UtahBeehiver View Post
      As I did each course, any surplus mortar I used to cover the previous dome work. Just a good way to use up the extra mortar rather than just waste it.
      I haven't had any excess mortar yet! I'm having to mix very small batches due to the weather - currently 94F and breezy - it's like building an oven inside a giant convection oven!

      I'm having trouble keeping the brick moist - and the mortar is not workable very long at all...I can lay about 6 - 7 brick and then it is drying out. And I'm starting off with mortar a little wetter than normal. Maybe I should be doing this in the Fall or Spring....

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      • #4
        Re: Question - Mortar over brick dome

        I assume you are soaking your bricks before laying, if not try that to buy you some adjustment time. You can always wait until you are done and if you have the materials left the use them up on the dome, if not, so be it.
        Russell
        Build Link............... Picassa Photo Album Link

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        • #5
          Re: Question - Mortar over brick dome

          Originally posted by UtahBeehiver View Post
          I assume you are soaking your bricks before laying, if not try that to buy you some adjustment time. You can always wait until you are done and if you have the materials left the use them up on the dome, if not, so be it.
          Yes, I'm soaking the bricks overnight.

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          • #6
            Re: Question - Mortar over brick dome

            Originally I started with the idea that mortar is 'glue' but after playing around with a bit of masonry I've evolved to think of it as a spacer that allows force to be transmitted from one block to another. So I wouldn't think a thin layer of mortar over the outside of the dome is going to do much structurally.

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            • #7
              Re: Question - Mortar over brick dome

              There is no need to soak the bricks that long. What I did, and it was hot here when I did my build.....I stopped wetting my bricks and went with a wet mortar in a mortar bag. I squeezed wet mortar into every crevice and cranny. It worked really well. You get the glue like contact when you have a brick that is drier. The wet bricks made it harder to work with. Just my 10 cents.
              Darin

              I often cook with wine, sometimes I even add it to the food...
              WC Fields


              Link to my build

              http://www.fornobravo.com/forum/f8/4...-ca-20497.html

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              https://picasaweb.google.com/1121076...eat=directlink

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              • #8
                Re: Question - Mortar over brick dome

                Originally posted by Novaslo View Post
                There is no need to soak the bricks that long. What I did, and it was hot here when I did my build.....I stopped wetting my bricks and went with a wet mortar in a mortar bag. I squeezed wet mortar into every crevice and cranny. It worked really well. You get the glue like contact when you have a brick that is drier. The wet bricks made it harder to work with. Just my 10 cents.
                G'day
                Zackley ... Everything in moderation... A damp brick great. Cool and dry the "mud" sticks just great.
                Real hot 40C and really dry brick will suck the moisture out of that "mud" really fast. The other extreme.
                Sometimes it comes down to the builder finding out what suites
                Regards dave
                Measure twice
                Cut once
                Fit in position with largest hammer

                My Build
                http://www.fornobravo.com/forum/f51/...ild-14444.html
                My Door
                http://www.fornobravo.com/forum/f28/...ock-17190.html

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