web analytics
Fireblock Chimney - Forno Bravo Forum: The Wood-Fired Oven Community

Announcement

Collapse

Forum Issues Update

We are continuing to work diligently to resolve the issues currently being experienced with the PhotoPlog. Thank you for your patience!
See more
See less

Fireblock Chimney

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

  • Fireblock Chimney

    So I ended up with a lot of left over fireblock and I was wondering could I just build the chimney out of fireblock and cover it? I looked through the forums but I couldn't find anyone who did it that way.

    The oven is outside and the chimney is only going to be about 5 foot tall.

    Any help would be appreciated!

  • #2
    Re: Fireblock Chimney

    Yes, you can do it, but the turbulence caused by the joints and rough brick messes up the draw, and it won't clean as easily as a lined chimney. With a wide enough chimney, the draw isn't much of an issue, though. And it's more bricklaying. I was pretty tired of it when I got to the chimney.

    Also, I don't know that I'd try to adhere anything to the outside of the firebrick because of the temperature extremes in the chimney. You'll be at 400 at the top of the vent, and that soaks into the firebrick and radiates to the outside. If you have mortared decorative facing to the firebrick, it could fall off. I would build an air gap between the firebrick and the exterior.

    Furthermore, it may be cheaper to buy liner if you don't have a lot of brick laying about (like 36 to 72 bricks).
    Last edited by azatty; 06-11-2012, 07:31 PM.

    Comment


    • #3
      Re: Fireblock Chimney

      Originally posted by dolijr View Post
      So I ended up with a lot of left over fireblock and I was wondering could I just build the chimney out of fireblock and cover it? I looked through the forums but I couldn't find anyone who did it that way.

      The oven is outside and the chimney is only going to be about 5 foot tall.

      Any help would be appreciated!
      I'm not sure if fireblock are the same as fire brick but, I built my liner out of fire brick. Set a gap between the liner and the face brick and filled the void with vcrete. To figure it for an 8" ID flue: that is 5 fire brick per row, 3 rows per foot, multiplied by 5 feet = 75 fire brick. Compared to the dome and entry not very difficult.

      note: My chimney has not seen live fire as of yet. Just a prototype, but I don't forsee any problems .
      I don't care what folks say behind my back........They are either braggin' or.......lyin'


      My Build
      My Picasa Web Album

      Comment


      • #4
        Re: Fireblock Chimney

        Originally posted by azatty View Post
        And it's more bricklaying. I was pretty tired of it when I got to the chimney.
        that comment made me laugh pretty hard . I know exactly how you feel.

        FWIW, Clay flue pipe is probably much cheaper than firebrick, unless you bought it already and/or got a smoking deal.
        My build progress
        My WFO Journal on Facebook
        My dome spreadsheet calculator

        Comment


        • #5
          Re: Fireblock Chimney

          Originally posted by deejayoh View Post

          FWIW, Clay flue pipe is probably much cheaper than firebrick, unless you bought it already and/or got a smoking deal.
          I ended up with way too much brick and they are going to charge me a 20% restocking fee to take the block back, so i am stuck with a lot of extra block. I roughed it together and have enough block to do a 5 foot section and I basically wasn't planning on doing a lot of cutting, since that is the worst part.

          I just haven't seen anyone use this model and I was wondering if there was any disadvantages.

          Comment


          • #6
            Re: Fireblock Chimney

            Originally posted by dolijr View Post
            I ended up with way too much brick and they are going to charge me a 20% restocking fee to take the block back, so i am stuck with a lot of extra block. I roughed it together and have enough block to do a 5 foot section and I basically wasn't planning on doing a lot of cutting, since that is the worst part.

            I just haven't seen anyone use this model and I was wondering if there was any disadvantages.

            You'll definitinely need to overbuild your arch to support the weight of all those bricks. For ideas, I'd suggest taking a look at Gulf's "Mississippi Queen" build. A serious masterwork of masonry.
            http://www.fornobravo.com/forum/8/mi...tml#post127324
            My build progress
            My WFO Journal on Facebook
            My dome spreadsheet calculator

            Comment


            • #7
              Re: Fireblock Chimney

              deejayoh,
              Thanks a bunch .

              dolijr,
              IMO I think that a five foot 8" ID fire brick liner (as I described) can be placed on a typical arched entry, as long as it is buttressed. I did not place the weight of my chimney liner on top of the arch, though. If you look back at my build you will see that I placed the weight to the outside. That was because I built an unusually large entry/fire place/smoke chamber to be used for multi-purposes. The weight of the oven is placed on the the 2" calsil layer. The weight of the flue and chimney is transferred to the 4" of vcrete. The weight of the face brick is transferred to the hearth slab. The liner and the face brick with the vcrete insulation between are one unit, but they must be treated separately.
              Also, I think that I read that you were tired of cutting brick. If so, my advice is to buy an insulated SS liner or take a break before you continue .
              Last edited by Gulf; 06-13-2012, 12:50 PM. Reason: spelling
              I don't care what folks say behind my back........They are either braggin' or.......lyin'


              My Build
              My Picasa Web Album

              Comment

              Working...
              X