#41  
Old 10-31-2012, 06:26 AM
Laborer
 
Join Date: May 2011
Location: Brisbane Australia
Posts: 62
Default Re: 35 inch Pompeii Oven Build Saga

Well finally got around to posting some more photos...

I decided it might be easier to build the roof frame on the ground and lift it up later - I think it was a good way to go.

With the roof on, I did the sheet metal work around the flue pipe with an outer box from cement fibre sheet and filled space with vermiculite cement.

You can see the windkat chimney cap I got from ebay, one of the best buys I have made.

Before I started a fire, I had to divert my attentions to some oven tools. First of all a poker and metal rake to drag out the ashes. I have a flat and curved rake in mind plus a mop, brush and metal pizza peel. Will get some photos soon... pretty fortunate my Dad is a retired welder.

Finally have a little fire in the hole.... ended up using wood because I could not wait any longer (to arrange for a gas burner or heat beads). I found it quite difficult to maintain a small fire, had to continually feed it with small quantities of small twigs to keep the temperature down. It still got hotter than I had aimed for and the heat was a bit uneven between the floor, sides and top.

Next batch of photos and commentary coming soon.

Brett
Attached Thumbnails
35 inch Pompeii Oven Build Saga-pompeii-oven-061-roof-frame.jpg   35 inch Pompeii Oven Build Saga-pompeii-oven-062-roof-.jpg   35 inch Pompeii Oven Build Saga-pompeii-oven-063-insulated-flue.jpg   35 inch Pompeii Oven Build Saga-pompeii-oven-064-first-fire.jpg  
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  #42  
Old 11-01-2012, 05:02 AM
Laborer
 
Join Date: May 2011
Location: Brisbane Australia
Posts: 62
Default Re: 35 inch Pompeii Oven Build Saga

A few more photos for your entertainment. Well went on to a larger fire the next day. Got a little tired of feeding the fire and maybe heated it up a little to fast and the dome started to clear.

Surprise surprise - a few creaks on the outside. I was a bit "dismayed" at first but the creaks just follow the brick joints and look worse than they are plus are only evident/visible only on the outside, not the inside.

Anyway, thought about grouting then up but decided they are narrrow really creaks that are just part of the natural expansion of the oven. So went on with wrapping the dome in three layers of ceramic insulation.

In retrospect, since I let the oven dry naturally for >>several weeks, I would have been inclined to think it is better to do the dome insulation first before firing because it might have helped distribute and control the heat across the oven more evenly.

Just have to finish the enclosure walls and make a door now !

Brett
Attached Thumbnails
35 inch Pompeii Oven Build Saga-pompeii-oven-065-second-fire.jpg   35 inch Pompeii Oven Build Saga-pompeii-oven-066-little-too-hot1.jpg   35 inch Pompeii Oven Build Saga-pompeii-oven-067-little-too-hot2.jpg   35 inch Pompeii Oven Build Saga-pompeii-oven-068-started-clear.jpg   35 inch Pompeii Oven Build Saga-pompeii-oven-069-insulation-.jpg  

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  #43  
Old 11-01-2012, 05:40 AM
Apprentice
 
Join Date: Feb 2012
Location: ohio
Posts: 133
Default Re: 35 inch Pompeii Oven Build Saga

Heard someone say think of cracks as self adjusting relief cuts, kind of like that, you eluded to it, no surprise part of the build, nice work, look forward to more pics
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  #44  
Old 11-01-2012, 03:27 PM
Laurentius's Avatar
Master Builder
 
Join Date: Nov 2010
Location: Japan
Posts: 859
Default Re: 35 inch Pompeii Oven Build Saga

Hi Mr. Toy,

Do a few more firing before insulating, drive off as much moisture as you can.
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  #45  
Old 01-25-2013, 02:43 PM
Peasant
 
Join Date: Jan 2012
Location: Australia
Posts: 26
Default Re: 35 inch Pompeii Oven Build Saga

A newbie here and first ever post. I've been searching and researching for awhile now. I thank you Mistertoy for your photographs. Very detailed and leaves less questions. I'm about to start my build. Have most of the materials for the stand and will start in the next week thanks to your pics.
Rickaroonie
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  #46  
Old 05-07-2013, 07:40 AM
Serf
 
Join Date: May 2013
Location: Ballarat vic Australia
Posts: 2
Default Re: 35 inch Pompeii Oven Build Saga

Great build thread, after looking through your build, I don't know if it helps build confidence or scares me more,
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  #47  
Old 05-08-2013, 12:16 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,828
Default Re: 35 inch Pompeii Oven Build Saga

Quote:
Originally Posted by Mistertoy View Post

In retrospect, since I let the oven dry naturally for >>several weeks, I would have been inclined to think it is better to do the dome insulation first before firing because it might have helped distribute and control the heat across the oven more evenly.

Brett
I agree, One of the problems of driving out the water with no insulation on is that there is a big difference in temperature and therefore expansion between the inner surface of the bricks and the outer surface which is a condition that is inviting cracking. The blanket will moderate this problem to a large extent. The trouble is it makes it difficult to inspect the outer dome surface to check for cracks once it has been covered in blanket or vermicrete. Plus the blanket will hold some of the moisture being pumped out of the dome. Remember, if you see visible steam then you are going too fast, let the fire die down.

Last edited by david s; 05-08-2013 at 12:20 AM.
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  #48  
Old 05-08-2013, 05:37 AM
Greenman's Avatar
Master Builder
 
Join Date: Feb 2013
Location: Bundaberg. Australia
Posts: 793
Default Re: 35 inch Pompeii Oven Build Saga

There are probably pros and cons for both methods. I have just done a week of curing fires without insulation and other than some fine cracks there was no issues. As the firings progressed the cracks settled to the extent that they closed and stayed that way for the last fire. It wasn't until the 3rd fire that moisture could be seen in places on the exterior of the dome and when that evaporated off after a couple more fires it was a good indication of progress.

I am presently waiting for the vermicrete to dry before applying the render coat. I expect that steady fires will be the way to go for the first few fires after it is all done.

Like David said, you don't really know what is happening under the insulation but it will probably assist in moderating the temperatures.

Cheers............. Steve
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