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Mortar all cracks or go with Perlcrete? - Forno Bravo Forum: The Wood-Fired Oven Community

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I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

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.

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Mortar all cracks or go with Perlcrete?

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  • Mortar all cracks or go with Perlcrete?

    My dome is complete, and I have progressed through the curing fires, but as the fires got bigger, I noticed several small cracks here and there which leak smoke occasionally. I have been filling the bigger cracks with mortar as I see them, but I'm curious is that's even necessary.

    I'm planning a thick layer of Perlcrete, so will I be causing/hiding/delaying any problems by going ahead with the Perlcrete layer without worrying any longer about the cracks? The Perlcrete and other insulations are designed to keep the heat in, so I'm thinking it should also block any smoke/heat loss from the cracks. What do you experienced builders think?

    Thanks!
    Toby

  • #2
    Re: Mortar all cracks or go with Perlcrete?

    Originally posted by charger10s View Post
    but I'm curious is that's even necessary.
    Being the pedant that I am I would brush a slurry of mortar into the cracks as the oven is hot.
    The English language was invented by people who couldnt spell.

    My Build.

    Books.

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    • #3
      Re: Mortar all cracks or go with Perlcrete?

      When you say "brush" do you literally mean use a brush? And by slurry, is that just a really wet mortar mix? I can try that, but some of the cracks are really thin, am I am asking for trouble if I just go with the perlcrete?
      Toby

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      • #4
        Re: Mortar all cracks or go with Perlcrete?

        Go with the perlite/vermiculite/cement after mortaring the larger cracks. In this instance I would define "larger" as a crack about 1/32 inch wide or more.

        Small hairline cracks will always be forming and are not critical.
        Last edited by Neil2; 05-23-2011, 11:35 AM.

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        • #5
          Re: Mortar all cracks or go with Perlcrete?

          Cool, thanks for the input guys!
          Toby

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          • #6
            Re: Mortar all cracks or go with Perlcrete?

            Originally posted by charger10s View Post
            When you say "brush" do you literally mean use a brush? And by slurry, is that just a really wet mortar mix?
            Yes, but I wouldnt worry about hairline cracks.
            By crack I thought you meant a proper crack.
            The English language was invented by people who couldnt spell.

            My Build.

            Books.

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            • #7
              Re: Mortar all cracks or go with Perlcrete?

              Originally posted by brickie in oz View Post
              Yes, but I wouldnt worry about hairline cracks.
              By crack I thought you meant a proper crack.
              Awesome, thanks again!
              Toby

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