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Hardibacker as hearth leveler? - Forno Bravo Forum: The Wood-Fired Oven Community



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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Hardibacker as hearth leveler?

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  • Hardibacker as hearth leveler?

    I've been doing some thinking about how to level the hearth so that bricks are level, especially over perlcrete insulation. The consencus seems to be using a layer of 50/50 sand/fireclay but I wonder if Hardibacker could be used. I've been doing some Internet searching, especially at Hearth.com | Wood Stoves, Fireplace, Pellet Stoves, Gas Stoves and More - Forums! and think that 1/4" hardibacker might be a good solution.

    I have personally placed Hardibacker over a sustained high heat for five minutes and there was no damage to the board, no smoke, no fumes, just a very slight crack.

    Has anyone tried Hardibacker under their floor? What are your thoughts?


  • #2
    Re: Hardibacker as hearth leveler?

    The problem is really not the foundation but the variation in the thickness of most firebricks. I laid my floor out on a sheet of plywood for positioning and cutting and they were not level even on 3/4 inch sanded ply.

    The sand/fire clay method is tried true and easy. Use a 1/4 inch notched trowel and a rubber hammer and it will go well. just like laying tile but easier.



    • #3
      Re: Hardibacker as hearth leveler?

      Ah, good point. I was under the impression that the perlcrete and ceramic fiber board was causing the bricks to be uneven. The bricks I have are very uniform. But on another point, people use a 5:1 perlcrete mix to give the oven a solid base to sit on. If Hardibacker were used to distribute the weight, a much leaner mix could be used providing greater insulation values. I'm not trying to defend using Hardibacker, just trying to think through the issue.



      • #4
        Re: Hardibacker as hearth leveler?

        Hardibacker is not a refractory material. I called the James Hardie company at one point and they would not support the strength nor durability of their board in an environment nearing 500F. Floor bricks in direct contact with Hardibacker will exceed this temperature over many repetitive cycles.

        Go with the sand and fireclay. Like Chip said: it's proven and easy, but also inexpensive.


        • #5
          Re: Hardibacker as hearth leveler?

          Thanks Chip and John for your great comments.