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  #11  
Old 09-22-2013, 04:15 PM
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Default Re: Crack

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Originally Posted by david s View Post
eliminated if the design incorporates an expansion joint/ heatbreak between the decorative arch and the inner oven parts.
Who has done that? The decorative arch is pretty much sitting at ambient temperature. Do you mean the dome and the vent/entry?
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Old 09-22-2013, 05:10 PM
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Default Re: Crack

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Originally Posted by Les View Post
Who has done that? The decorative arch is pretty much sitting at ambient temperature. Do you mean the dome and the vent/entry?
I for one, have heat breaks at both ends of the flue arch. I know there are others out there.
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Old 09-22-2013, 05:29 PM
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Default Re: Crack

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Who has done that? The decorative arch is pretty much sitting at ambient temperature. Do you mean the dome and the vent/entry?
Yes, that is the point. The outside of the arch is at ambient while the inside of it is getting hot. It is similar to an uninsulated flue tile which is likely to crack because one side is hot while the other side remains cool. Lots of ovens,Rado's from traditional oven and mine as well as many others are built this way. I meant between the outer decorative arch and the entry, but on both sides of the entry like Chip's is probably even better.

Last edited by david s; 09-22-2013 at 05:43 PM. Reason: Clarification
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Old 09-22-2013, 06:01 PM
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Default Re: Crack

Never seen a problem there. Mine is always cool enough to touch as the gasses have escaped up the vent. Since the brick doesn't conduct heat very well I think something else is contributing to the crack (bad masonry, shifting of the base...)
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Old 09-22-2013, 06:15 PM
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Yes actually it's not really getting hot, but it definitely didn't show until that first big fire. It is just a hairline, barely 1mm
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Old 09-22-2013, 06:47 PM
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Ignore it - tell everyone you designed in a heat break.
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Old 09-22-2013, 11:49 PM
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Default Re: Crack

Heres my heat break made of insulating fire bricks.
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Old 09-23-2013, 06:07 AM
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Default Re: Crack

IFB'S are good insulators, but won't act too well as an expansion joint because they don't compress.
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