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Chimney under barn dilema - Forno Bravo Forum: The Wood-Fired Oven Community

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Chimney under barn dilema

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  • Chimney under barn dilema

    Hi All,
    Newbie here, May I first thank all who have contributed to this great site making it a wealth of information to those of us who are now, eagerly but with some trepidation, embarking on that holy grail to pizzardom and thank you in anticipation of your help and advice to my quandry.

    I wish to build the oven inside my barn which has a very high roof, to the ridge is about 17 feet but the supporting beams are maybe only12 feet above ground
    The barn itself is over 100 years old and has many oak beams criss crossing to support the roof some of the beams are about 12 x 12inches The roof however is fairly new covered with ceramic tiles.
    My intention is for the chimney to vent through the roof.
    My concern is the fact the chimney would be touching some beams on the way up.
    So my questions are:
    Would the heat emitting from the chimney be so intense as to set fire to nearby wood.
    DO I HAVE TO go through the roof or would a cap over the top of chimney be enough to stop heat burning roof ( there is plenty of ventilation between the barn wall and roof, it is not a sealed barn) so smoke would hopefully dissapate through the eaves.

    I live in Bulgaria so rules on what you do are a matter for the individual to some extents, I just dont want to burn my barn down.
    It is very difficult, apart from the language barrier to source the materials people are mentioning. I have found Perlite but vermiculite seems to be unheard of.
    Is anyone out there in FB land living in Bulgaria??
    Once again many thanks for any help given.
    YK

  • #2
    Re: Chimney under barn dilema

    If it were mine I'd be using a double flue so the outside of the outer section wouldn't be hot enough to worry the timber beams. If you are short of cash you can make it double just where it goes past the beams and through the roof, keeping the rest of the flue pipe single. If you don't go through the roof you'll smoke out the barn.
    Kindled with zeal and fired with passion.

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    • #3
      Re: Chimney under barn dilema

      Originally posted by yorkshireknight View Post
      Hi All, So my questions are:
      Would the heat emitting from the chimney be so intense as to set fire to nearby wood.
      DO I HAVE TO go through the roof or would a cap over the top of chimney be enough to stop heat burning roof ( there is plenty of ventilation between the barn wall and roof, it is not a sealed barn) so smoke would hopefully dissapate through the eaves.
      ...... I just dont want to burn my barn down.
      Whoa...Do NOT let your chimney contact the wood, double walled or not.

      x2 on venting the chimney through the roof...Bad idea to vent it inside a building...doesn't matter if it is open or not. Otherwise the later part of your post will come true.
      Old World Stone & Garden

      Current WFO build - Dry Stone Base & Gothic Vault

      When we build, let us think that we build for ever.
      John Ruskin

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      • #4
        Re: Chimney under barn dilema

        Many Thanks David & Stonecutter for your prompt replies,

        I shall take on board what you suggest.

        1. I will definatley go through the roof ( and nodoubt will do many times on this project !!)
        2 I will perhaps double line where close proximity of beams while trying to ensure no contact. ( You are very near to a yorkshiremans heart thinking of the cost David S)

        I think they have flexy flues here so may have to use one to steer away from any obstacles.
        I have looked,read, deliberated over many months on the Fb site and at last have now decided on WHERE it will go now I know I can work around my dilema.
        YK

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        • #5
          Re: Chimney under barn dilema

          yorkshireknight
          my flue runs up through the roof,it is arounf 12 feet high in total and is double through the iron. It is only around15mm thick and I have packed it with a good insulation the outer surface does not get very hot. It is sealed on the topside with a standard plumbers rubber seal, probably silicone, but no deteriation over the past 4 years and I have had some hellish fired up the flue.
          There are a few pics in my build, so check it out.

          Cheers.

          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: Chimney under barn dilema

            Thanks Nissanneil,

            Your oven looks a cracker, whats the diameter of your chimney?
            I take it the flue must be reduced from its original size at the busy end, has this caused a problem with draught?
            YK

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            • #7
              Re: Chimney under barn dilema

              YK,
              the flue is 8" all the way with a 10" or there abouts piece of what I could find laying about to go through the roof. There is no reduction in the flue at all as this would reduce the draw and we don't want that. The flue draws really well but the transition id quite large and captures all the smoke and gasses on light up. As I have said here before, the only smoke that I have ever seen was when I had some bought firewood that didn't want to burn nicely, I was running out of time so I hit it with a petrol leaf blower which made it work well, and when I went full throttle, you could almost have melted steel in it, no smoke but the flames actually were coming out the front arch. I thoroughly recommend a decent transition and a larger rather than smaller chimney/flue.

              Cheers.

              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

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