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hearth insulation layer - Forno Bravo Forum: The Wood-Fired Oven Community

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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.
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hearth insulation layer

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  • hearth insulation layer

    Hi, I've just bought a wfo from a shut down small restaurant & rebuilding it in my garden. The plans I have recommend using a 1" lean cement (9 parts sand 1 part cement) on top of the concrete hearth support, and then their fire bricks, 30mm deapth on top of that. Having read your Pompeii plan (excellent by the way!) there doen't seem to be enough insulation in my oven hearth? I guess the sand is acting as insulation but is it enough? Can anyone advise? Many thanks, Alex

  • #2
    Re: hearth insulation layer

    Sand is not a particularly good insulation material. In the case of a 9:1 sand, cement mix you will be getting some air space around the sand which will act as an insulator, but it is not a particularly good result. A 5 or 6 :1 vermiculite or perlite mix will provide many more spaces in the resulting mix and give you a way better performing insulating layer.
    Kindled with zeal and fired with passion.

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    • #3
      Re: hearth insulation layer

      1" lean cement (9 parts sand 1 part cement) on top of the concrete hearth
      Not only is sand a particularly poor insulator, like the gravel and broken glass that are sometimes cited, but one inch of anything is not nearly enough insulation. David's suggestion above of a vermiculite mix is a good one, but you will need at least four inches of vermiculite concrete. If you are pressed for space, you can substitute two inches of refractory insulation board.
      My geodesic oven project: part 1, part 2

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      • #4
        Re: hearth insulation layer

        Go with the refractory insulation board. I tried a single layer of firebrick atop an insulating layer of sand and consider it now to be a huge mistake. I'm losing so much heat through the hearth that I often have to rake coals out onto the hearth between pizzas to get the temperature back up again. I built an 1100 degree monster fire two weeks ago that kept the hearth hot enough, but it had to be watched very carefully because the top and edges of the pizza were incinerated after little more than a minute.

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