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  #21  
Old 02-01-2014, 04:14 PM
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Default Re: Time to build my bread / pizza oven

The floor is also the hardest part to heat up, that is why I questioned it. If your primary goal is bread it makes sense though. When you build your fire, you should spread the coals over the entire floor and turn them frequently to get more heat into the floor.

edit- You cut brick one time, you deal with edge-catching for the life of the oven, it is worth running them at a 45 degree angle.

Last edited by Tscarborough; 02-01-2014 at 04:17 PM.
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  #22  
Old 02-01-2014, 09:30 PM
Journeyman
 
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Default Re: Time to build my bread / pizza oven

my bricks are not at 45 and luckily i've had no issues with it catching the peel, been using my oven for four years now.
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  #23  
Old 02-02-2014, 03:26 AM
Peasant
 
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Default Re: Time to build my bread / pizza oven

I've never seen a barrel vault oven with the bricks running at 45 degrees. After laying the hearth bricks I smoothed off any uneven edges with a diamond polishing disk. If your bricks are at different heights you will catch the peel noi matter what angle that are at.

Matthew
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  #24  
Old 02-02-2014, 05:01 AM
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Default Re: Time to build my bread / pizza oven

Gudday
Hitting a mm of raised brick at 90 degree can bring your peel to sudden stop. Hitting the same 1 mm raised edge at 45 degree to the direction of travel means the peel glances off . No sudden stop.
My ovens a few years old now ,no real high spots, nothing that will stop a peel. Have never contemplated grinding the hard outer surface of the brick surface unless it absolutely the last thing. And if I had too take such action it would be only one corner not the whole edge.
I'm writing this comment not as a reflection on you but rather as best practice for others to read.These ovens we build are going to move after a few years ... May as we cover as much as we can.
It's been interesting to watch your build,an insulated but fairly low mass oven for extended baking. Be interested to see how it performs against the "old school" high mass low insulation types
Regards dave
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  #25  
Old 02-02-2014, 08:29 AM
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Default Re: Time to build my bread / pizza oven

Exactly as Dave says, I am not denigrating your oven, but best practice is at a 45 degree. Here is a barrel with 45 degree floor (mine):

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  #26  
Old 02-02-2014, 11:21 AM
Peasant
 
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Default Re: Time to build my bread / pizza oven

Now I have seen one . I guess that the reason why this style of oven has them mainly straight is because that is how Alan Scott did it and he was so influential. This oven is an experiment in order to get the design right before building a much larger one. It sounds like a good suggestion, so on the larger oven I will probably use larger square hearth tiles and at 45 degrees.

Please keep the suggestions / observation coming. This is exactly why I have started the thread

Also, I was thinking next time to not have the side walls sitting on the hearth bricks and have some sort of expansion joint around the hearth, I have seen this on some ovens, but I would love to hear from someone who has done this.

Thanks

Matthew
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  #27  
Old 02-02-2014, 11:53 AM
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Default Re: Time to build my bread / pizza oven

There are many issues with the Alan Scott design. I wish I had had a chance to speak with him before his passing, but I never did.

I think most of the ovens built on this site use the floor inside method of construction, I do not think it matter one way or the other when using firebrick for the floor. If using biscotti tiles, then it certainly should be built inside as there is a very good chance that they will need replacing.
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  #28  
Old 02-02-2014, 12:31 PM
Peasant
 
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Default Re: Time to build my bread / pizza oven

I have also seen much written about issues with alan scotts design. I was originally thinking of building from his instructions, but the area around the reducer arch in particular bothered me so I started to try to redesign this area to make the oven better insulated, also the use of perlcrete did not sound optimal. The oven builders I think called Turtle rock who have replaced a few alan scott ovens seemed tomhave some great ideas, I stumbled upon their blog and got lots of good ideas from them. The pictures on their blog gave me the confidence to build this oven.

Matthew
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  #29  
Old 02-02-2014, 01:21 PM
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Default Re: Time to build my bread / pizza oven

Those guys look to have it figured out pretty well. Thanks for telling me about them.
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  #30  
Old 02-11-2014, 02:21 AM
Peasant
 
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Default Re: Time to build my bread / pizza oven

A week away for work again has kept me away from the oven, although I did keep up with the forum and thinking about the next steps. There is one area of the oven design I would like to improve, the transition between arch and the back wall opposite the oven door. The end wall just stands there, not bonded to the dome, just mortared together. I was assuming that this area would crack and it has. Often oven had a poured concrete jacket over this area, but as I only have brickwork I need an alternative solution. I have seen on a few posts people discussing a break between the dome and the external arch of the Pompaii builds. I my current best plan is to leave a small gap there and fill this with a ciramic roap or compressible gasket material, such as this Wysokotemperaturowa Uszczelka Ceramiczna VITCAS | Materia?y ?aroodporne do budowy kominków.
I wanted to hear the forums experiences with this, get some ideas etc. before I commit to an approach.
Thanks

Matthew
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