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My oven was built by a mason. The floor is fire birck over 3" mortar slab over corrugated metal. I want to insulate the undersurface which is the ceiling of a closed wood storage area. Any suggestions?
Thanks for the reply.
I can't do that since the oven is finished. Won't the slab store and release heat?
I have noticed that when I heat the oven to 900-+ I have to let the floor cool to 750+- Or the bottom of the pizza will burn.
If I put 8 loaves of bread in at less than 650 the oven temp drops quickly and I don't get the "burn" that provides that special flavor.
What are your experience?
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.
The bread ovens of Quebec, National Museums of Canada , Ottawa . Lise Boily & Jean-Francois Blanchette 1979
Last edited by cobblerdave; 10-15-2012, 02:52 AM.
Reason: spelling (again) fat Fingers and mobil phones!
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