web analytics
Insulating blanket question - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

Photo Galleries are back! Instructions below.

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!

Forum users will be able to access their “PhotoPlog” images through their user profile page by clicking on the “Media” tab.
They will also be able to browse other albums by going to the albums page. (On the forum site, there is a link in the black bar beside “Forums” to the albums.)

In order for users to create an album please follow the steps below.
1) Go to user profile page and click “Media”
2) Click Add Photos
3) Enter Photo Gallery Title in the first field
4) Click Upload or Select from Photo Album to add photos
5) Click Post
6) Once posted, the album will be created as a “Topic” on the albums page for the public to see. The topic title will be the “Photo Gallery Title” they created before uploading their photos.


To create this migration path we used vBulletin5’s default album structure. Unfortunately, it won’t work like the “PhotoPlog” but is an album/gallery component on the forum now.
See more
See less

Insulating blanket question

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

  • Insulating blanket question

    Hi,

    I have a question about applying ceramic fibre insulating blanket. Once I place a layer or two of the blanket (25mm, 1" per layer) over my bricks and cover it with chicken wire, how should I apply the next layer of vermiculite/fondue render.

    Should I place it on heavy and compress the insulating blanket down as much as possible, or do it lightly and leave the air layer in the blanket as much as possible, or should it be applied somewhere in the middle?

    Cheers,
    Peter.

  • #2
    Re: Insulating blanket question

    The blanket is fairly dense and the vermiculite concrete pretty light. You'd have a hard time compressing it with this stuff even if you wanted to, which you don't.

    The problem people have is with getting it to stick. You may want to do it in two stages, building a ring around the bottom, then using that to support the layer on top the next day.
    My geodesic oven project: part 1, part 2

    Comment


    • #3
      Re: Insulating blanket question

      That sorts that question out pretty quick, I hope the trend continues.

      cheers,
      pk

      Comment


      • #4
        Re: Insulating blanket question

        PJK,

        I've done a fair bit of work in this area and found a few tricks that might help. One: make sure the chicken wire is tight to the blanket. You can do this by cutting it and stitching it up with the cut ends so there are no bulges.
        Two: get a spray bottle and mist the blanket before applying the mixture. This might lengthen your cure time somewhat, but it really helps with sticking. Three: most vermic or similar mixtures do no like staying on near vertical surfaces, so begin with a fairly thick layer and go from the bottom up. Hold the stuff in position for a count of ten before removing your trowel.

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

        Comment


        • #5
          Re: Insulating blanket question

          Hi Peter,
          check out my experiences with exactly your predicament at:

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

          I found that you start with a 5:1 mix vermiculite: portland at the very top of the dome and work your way down and around. I also found that the first coat was the hardest and added approx 1/2 pt of fireclay which made it stickier.
          I used a brickies trowel (as I didn't have much room to work with a hawk) to hold the mix and a steel cement trowel to scape it off and ALWAYS work your material UP! It will simply continue to fall off if you don't but you soon work that out. Don't try to put more than a 1" layer on at a time, again I found that it causes more trouble than it was worth. Apply 3 X 1" layers and that should be enough. My oven at 500°C inside is cold on the top outer dome.

          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

          Comment


          • #6
            Re: Insulating blanket question

            Is it that much more to skip the vermiculite and just use another layer or two of the ceramic insulating blanket. Seems the the blanket only might be better anyway. What do you guys think?

            Comment


            • #7
              Re: Insulating blanket question

              Originally posted by fsucpa View Post
              Is it that much more to skip the vermiculite and just use another layer or two of the ceramic insulating blanket. Seems the the blanket only might be better anyway. What do you guys think?
              Here's a link to James' discussion on that subject.

              http://www.fornobravo.com/forum/f6/i...iency-218.html

              It has very useful info that should help you.
              My thread:
              http://www.fornobravo.com/forum/f8/d...ress-2476.html
              My costs:
              http://spreadsheets.google.com/pub?k...Xr0fvgxuh4s7Hw
              My pics:
              http://picasaweb.google.com/dawatsonator

              Comment


              • #8
                Re: Insulating blanket question

                It all dpends on how you wish to finish your oven and where it is.
                If it is outside and you wish to maintain the igloo shape, then I would certaoinly vermiculite cement coat the dome. If however, you have an inside installation OR intend building a waterproof housing, then the extra cost for the extra layers of superwool would do the trick.

                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

                Comment


                • #9
                  Re: Insulating blanket question

                  actually, I would have thought quite the opposite, in that a box-like housing could easier contain the what appears to be a pain in the butt loose vermiculite, as opposed to the igloo, where to pour some kind of vermiculite layer over the ceramic blanket insulation, and then hope to seal it with that final mud layer would seem to be much harder. By the way, that mud layer that goes on after the ceramic blanket/vermiculite, why are we using that final mud layer. Seems like a couple of extra layers of blanket, then chicken wire, inside a box like structure, bam, your done? Obviously, you can tell I am a newbie?

                  Tom

                  p.s.- also, can someone comment on the relative costs of using said extra layers of insulfrax vs insulfrax and vermiculite. In addition, could someone also comment on the use of insulfrax vs kaowool, which is also a ceramic blanket,vs " Safe" non-cermic blanket, described as "This is the "Body Fluid soluable" non-ceramic fiber blanket" "This Roll is the Superwool 607 Max product rated at 2192 F degrees continuous use". this stuff seems to be half the cost of the kaowool.

                  So, again, that is kaowool vs insulfrax vs non-ceramic blanket vs insulfrax/vermiculite.

                  Thanks for help with this seemingly complicated subject.

                  Comment


                  • #10
                    Re: Insulating blanket question

                    Guys,

                    Thanks for the tips and the links, great info.

                    Cheers,
                    Peter

                    Comment

                    Working...
                    X