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  #201  
Old 06-21-2011, 01:19 PM
david s's Avatar
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Location: Townsville, Nth Queensland,Australia
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Default Re: Oven Curing

If you can bear to be patient and wait for a couple of weeks you can let the weather do much of the drying out for you. Can you expose the oven to sun and wind? But don't get rain on it. This will help lots. Also do a calculation of how much water you've added, as about 1/3 of the volume of a vermicrete layer is water. I find doing the vermicrete layer in stages (one inch then wait a week for it to dry somewhat) helps enormously.
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  #202  
Old 06-22-2011, 01:35 AM
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Default Re: Oven Curing

Hi James
Just a quick question re the curing fires , the temps that you have quoted ,are these Floor or Air Temps
Regards
Grant
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  #203  
Old 07-27-2011, 12:13 PM
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Join Date: Jan 2011
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Default Re: Oven Curing

Question on curing. I let the oven sit for 3 weeks before the first fire. Started low temp fire on day one and noticed some very fine cracks in several places after it had cooled overnight. Is this a problem? After day two there were no new cracks. I have not installed the arch yet. Do I need to set small fires to cure the refractory mortar on in too
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  #204  
Old 07-27-2011, 03:05 PM
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Join Date: Jan 2011
Location: California
Posts: 105
Default Re: Oven Curing

Hi FiredupinNH,

Small hair line cracks are normal, they generally never get any bigger, and will not effect your oven in any way.
Normally people install the arch before the curing process, I would suggest doing a slow, low fire after you attach your arch.

Please call me at 1-800-407-5119 ext 14 if you have any questions.

Thanks,
Heidi
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  #205  
Old 09-15-2011, 02:55 PM
Serf
 
Join Date: Jun 2010
Location: MI
Posts: 2
Default Re: Oven Curing

Can you help me please?
I just purchased the Primavera60 and got it yesterday. I have got to all the oven curing is see that. I live in Michigan and I am concerned about the winter cold, snow and ice. I was hoping I could cook some during the winter and use the oven, after reading all of this I worry about cracking?

Should I be concerned? Please help and thank you kindly in advance for your help!
Mark
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  #206  
Old 09-16-2011, 05:41 AM
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Default Re: Oven Curing

Even in Michigan it shouldn't be freezing yet. Cure the oven to schedule, fire it to temperature half a dozen times, and most important, make sure your enclosure is completely waterproof, and you should be able to use it all winter without problems. The main problem is water. Keep it dry, tarp it when not in use, or build a completely waterproof enclosure, and you're good to go.
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  #207  
Old 09-16-2011, 07:13 AM
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Join Date: Jun 2010
Location: MI
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Default Re: Oven Curing

I will follow this to a T and Thank you so much!
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  #208  
Old 09-16-2011, 08:33 AM
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Join Date: Jan 2011
Location: California
Posts: 105
Default Re: Oven Curing

Hello Markoo,

A wood-fired oven would work very well in cold climates, and it won’t have any trouble with snow and very cold temperatures. A modern wood oven is installed using high tech insulation, which holds the heat in when the oven is cooking and keeps the cold out. We have a number of photographs of ovens working in the snow on Fornobravo.com, and the because of the insulation, the snow never even melts on the outside of the oven enclosure.

Please let me know if we can answer any other questions.

Heidi
FB
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  #209  
Old 09-16-2011, 12:55 PM
Apprentice
 
Join Date: Aug 2009
Location: grand rapids, michigan
Posts: 139
Default Re: Oven Curing

Markoo, i live in GR and finished (sort of) my oven last fall. it's stuccoed, and between the stucco, chimney and door some moisture always gets in. i occasionally light a charcoal fire in the oven just to keep it dry... used it all winter last year
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  #210  
Old 10-11-2011, 11:14 PM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
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Default Re: Oven Curing

We've just had a 12 ft3 electric kiln installed at our school and part of the running in instructions require the kiln to be fired slowly(empty) to within 10- 20% of operating temperature over a two to three day period. It has been on for over 24 hrs now and is sitting on 550 C. There are two small pools of water that have appeared at the base of the kiln. This is water which is being driven out of the kiln materials. At 400 C I could see a drop of water actually falling out of the bottom of the kiln. Although its manufacture uses very little water because (compared to a WFO) it's made of insulating firebrick and dry insulation, it still contains considerable water. My point is that it takes way longer than you would think to remove all the water. Even after initial drying fires i reckon it usually takes about 10 decent cooking fires to eliminate all the water. Everyone seems to report that their ovens continue to improve in performance well after the curing fires, which indicates that moisture is still present. So take it slow, if you do the curing too fast you risk damage, but you can't do it too slow.
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