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  #71  
Old 07-21-2013, 08:07 AM
Laborer
 
Join Date: Sep 2008
Location: Michigan
Posts: 90
Default Re: 42 inch Michigan Oven

Haven't posted for a while but here are some older photos of the two cracks that developed. One of them let what appeared to be a very small amount of smoke out as evidenced by a small spot on the inside of the insulation. Certainly nothing to worry about, but I smeared a little moldable ceramic caulk over it just for peace of mind.
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42 inch Michigan Oven-imag0434.jpg   42 inch Michigan Oven-imag0435.jpg   42 inch Michigan Oven-imag0459.jpg  
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Last edited by jbruning; 07-21-2013 at 08:41 AM.
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  #72  
Old 07-21-2013, 08:13 AM
Laborer
 
Join Date: Sep 2008
Location: Michigan
Posts: 90
Default Re: 42 inch Michigan Oven

Here are some photos of the oven an it's 'temporary enclosure'. I had to get something up to keep the rain off of it and have been slowly working on it since but it is still very open with a lot of work to do.
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42 inch Michigan Oven-imag0453.jpg   42 inch Michigan Oven-imag0454.jpg   42 inch Michigan Oven-imag0455.jpg  
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  #73  
Old 07-21-2013, 08:16 AM
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Location: Michigan
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Default Re: 42 inch Michigan Oven

Oven in use.
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42 inch Michigan Oven-imag0461.jpg   42 inch Michigan Oven-imag0468.jpg   42 inch Michigan Oven-imag0469.jpg   42 inch Michigan Oven-imag0470.jpg  
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  #74  
Old 07-21-2013, 08:29 AM
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Join Date: Sep 2008
Location: Michigan
Posts: 90
Default Re: 42 inch Michigan Oven

One thing I did notice was associated with the sand/fireclay mix used to set the floor level. I had a couple of places where the CF board joints were a little wider than I would have liked and I "lost" some of the sand mix in the joints ( used it dry and screeded it for level). This material apparently provides a conduit for heat between the CF boards and in a couple of places I noticed when the oven was heated to or near 900 degrees the edges of the boards got hot enough to start burning the binders out of the boards which takes place at around 400 or 500 degrees. I just pushed some CF blanket into the vertical joints where this occurred, opened the joint slightly and pumped some of the CF caulk into the opening an inch or two. It worked fine and won't be a problem, but If I were to do it again I would 'seal' the joints of the CF board with the caulk before placing any leveling material.

I understood the boards had this binding material in them and that it was designed to burn off and I actually took off a corner of one of the boards before I placed them and burned it with a torch until the binders were gone. ....I was concerned about the physical properties of the board after this took place which would happen during normal oven use. The binders char and burn off and the board is more compressive after this occurs but this doesn't seem to be an issue given the practical experience of builders on this forum.
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  #75  
Old 07-21-2013, 08:55 AM
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Join Date: Jun 2013
Location: Queen Creek, Arizona
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Default Re: 42 inch Michigan Oven

Beautiful work! Are you planning on replacing the temporary enclosure with something permanent when all work is completed or leave it uncovered? That is a question I have not answered about mine but I'm in Arizona where we don't get a lot of rain.
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  #76  
Old 07-21-2013, 09:15 AM
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Default Re: 42 inch Michigan Oven

Quote:
Originally Posted by Cyungle View Post
Beautiful work! Are you planning on replacing the temporary enclosure with something permanent when all work is completed or leave it uncovered? That is a question I have not answered about mine but I'm in Arizona where we don't get a lot of rain.
Hi Cyungle,
Thanks! The temporary is slowly becoming the permanent structure. I was really pressed for time and there was rain in the forecast so I had to get something up fast since I had to remove the plastic awning as I started to cure. So, I framed the walls but only had a couple of studs and still only have a few trusses installed. I have since added the remaining studs and framed the gables but actually have to take the roof off to complete the installation of the remaining trusses and frame the chimney chase. That will take some time and I have to wait until my schedule and a reasonable forecast align to do so. I hate 'undoing' work, but really didn't have any options at the time. As it was I got the tar paper on just before dark and it rained early the next morning so it was just in the nick of time.

I am not confident in being able to keep moisture out of the oven and insulation with an igloo enclosure and prefer the look of the 'house' so I had planned on this type all along.
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  #77  
Old 07-21-2013, 12:50 PM
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Join Date: May 2012
Location: CONNECTICUT
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Default Re: 42 inch Michigan Oven

Hello john can you tell me how many layers of blanket do you have on you oven
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  #78  
Old 07-21-2013, 06:13 PM
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Join Date: Sep 2008
Location: Michigan
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Default Re: 42 inch Michigan Oven

Quote:
Originally Posted by GIANLUCA View Post
Hello john can you tell me how many layers of blanket do you have on you oven
Hi Gianluca,
At least 4, a little more on top. I got a reasonable price and my experience with insulation in this cold climate is more is better as a general rule. I want to be able to get as much residual heat cooking as I can and plan to use it during the winter. However, I am not sure if I am going to use any vermiculite in addition to the blanket.
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  #79  
Old 07-22-2013, 05:22 PM
Laborer
 
Join Date: May 2012
Location: Michigan
Posts: 70
Default Re: 42 inch Michigan Oven

Like any project...the finishing is the worst part. We are motivated to get the dome done and start cooking....making it waterproof is no frills. But your looking great. Keep after it...these things are a lot more fun admiring them while eating the best pizza ever....
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  #80  
Old 08-18-2013, 04:25 PM
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Join Date: Jul 2013
Location: Kyle, Texas
Posts: 228
Default Re: 42 inch Michigan Oven

Very well done! I love reading and seeing progress like yours. Im about to start my Dome and learned a few things from your thread. Impressive Mock-up!
You should move down here to Texas where we have no (very little) snow and somewhat predictable rain!
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