#11  
Old 10-14-2012, 04:48 PM
Serf
 
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Default Re: Oven floor insulation

That would be almost a rebuild and the oven is function well.
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  #12  
Old 10-14-2012, 05:10 PM
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Default Re: Oven floor insulation

Right, so insulating the slab is a waste of time and money.
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  #13  
Old 10-15-2012, 02:10 AM
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Default Re: Oven floor insulation

Gudday
Insulating the hearth and thereby raising its height will change the ratio between the door height and the height at the top of the oven. Many books quote a definitive measurement of the door height to be 63 per cent of internal height of the oven. This proportion has its origins in a book " bread ovens of Quebec" were this was an average of measurements of many ovens were the door height to oven height could vary from 44 per cent to 87 per cent.
So if insulating changes the magic 63 ratio I would not panic as long as it is close to 2/3 of oven height . Yes I have a mate who has a barrel oven with an internal chimney and a door height to oven internal height of ( trust my memory here) about 50 per cent. Yes he flashes it up with the chimney open but after the fire takes well, he caps it off and the oven works better and uses less wood and time till heat up than it does with the chimney uncapped.

Regards Dave
The bread ovens of Quebec, National Museums of Canada , Ottawa . Lise Boily & Jean-Francois Blanchette 1979
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Last edited by cobblerdave; 10-15-2012 at 02:52 AM. Reason: spelling (again) fat Fingers and mobil phones!
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