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Help, confused about oven isulation... - Forno Bravo Forum: The Wood-Fired Oven Community

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Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

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Help, confused about oven isulation...

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  • Help, confused about oven isulation...

    Hi, my name is Jean, I was hoping someone could help me with some steps to insulating an oven. My oven size will be 48.5x47x37, I will be using heat stop 50 (thats whats available in my area). Do I put a layer of heat stop 50, then insulfrax, then another layer of heat stop 50, or can I just do the heat stop 50, with insulfrax, then stucco. If someone could give me the proper steps in insulating my oven it would be greatly appreciated. I will be using the oven mainly for pizza and roasting, I would need to have the oven hot for about 5 hrs at most. Thanks

  • #2
    Re: Help, confused about oven isulation...

    Heat stop 50 is a refractory mortar dry mix. It sticks firebricks together. It's one of the best products for that. It's used because it has a high resistance to heat, and strength. It has no insulating value at all.

    Insulfrax is a brand name of refractory insulation, it comes as a blanket. Typically a couple of inches of this is used, then a layer of vermiculite or perlite concrete. These are the insulation.

    What goes on top of this is just for waterproofing. There is no reason to use refractory mortar here, it's really expensive. Most builders just use a layer of ordinary stucco if they are building an igloo style oven.

    Good luck with your project. Let us know how it goes.
    My geodesic oven project: part 1, part 2

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    • #3
      Re: Help, confused about oven isulation...

      Thanks dmun for a fast response, so I can use the heat stop 50 for the dome, then insulfrax for insulation, then waterproofing, such as stucco. Do I have to use vermiculite or perlite, or can I just double up on the insulfrax?

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      • #4
        Re: Help, confused about oven isulation...

        Hi Jean,
        I just finished my Pompeii and shown on the forum:

        http://www.fornobravo.com/forum/f21/...-4-a-2045.html

        (permalink #8)
        I have tried to describe and show pictures of the build and insulation in the postings. Check them out as it gives hints as to problem areas especially when trying to plaster the insulation with vermiculite (or peerlite) cement.
        The later postings are at:

        http://www.fornobravo.com/forum/f21/...10-a-2119.html

        Hope this is of assitance to you.

        Regards.

        Neill
        Prevention is better than cure, - do it right the first time!

        The more I learn, the more I realise how little I know


        Neill’s Pompeiii #1
        http://www.fornobravo.com/forum/f8/n...-1-a-2005.html
        Neill’s kitchen underway
        http://www.fornobravo.com/forum/f35/...rway-4591.html

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        • #5
          Re: Help, confused about oven isulation...

          Originally posted by demona165 View Post
          Thanks dmun for a fast response, so I can use the heat stop 50 for the dome, then insulfrax for insulation, then waterproofing, such as stucco. Do I have to use vermiculite or perlite, or can I just double up on the insulfrax?
          Nope, a double layer of insulfrax is just as good or better than a perlcrete layer. You may have to cover over the blanket with chicken wire to give your stucco layer something to grab onto.
          My geodesic oven project: part 1, part 2

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          • #6
            Re: Help, confused about oven isulation...

            No problem with extra layers - just the cost....

            Where my oven had 2 layers I could put my hand on the top of the second layer when the oven was up to temp.

            Christo
            My oven progress -
            http://www.fornobravo.com/forum/f8/c...cina-1227.html
            sigpic

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            • #7
              Re: Help, confused about oven isulation...

              Thanks for all the help, I will keep u posted as to my progress.
              Jean

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