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-   -   Building oven around a clay dome? (http://www.fornobravo.com/forum/f2/building-oven-around-clay-dome-19802.html)

69firebird 08-17-2013 07:42 AM

Building oven around a clay dome?
 
Hi,
I was looking at my options surrounding an oven, and I don't think I can do the brick thing. I found a place that sells portugese clay ovens (complete dome to floor) and all the insulating products. I was wondering if this was a viable option?

Essentially lay out the insulation , place the clay oven, build the front with chimney and wrap/finish the outside. So it seems this is an easier route (I know I way over simplified it) but is it a good route. The dome and floor would be terra cotta going this route?

So I haven't seen a lot on here about this so there is probably a reason, the kit I'm referencing isn't a FB kit so out of respect I will not link to it. I'm trying to understand conceptually if this is a route that makes sense.

Thanks!

thickstrings 08-17-2013 08:19 AM

Re: Building oven around a clay dome?
 
I looked at one of those about a year ago...It was suggested to me at that time that it would need more mass to retain heat and a layer of brick might be needed in the floor. I did'nt buy it http://www.fornobravo.com/forum/phot...dex.php?n=5634

stonecutter 08-17-2013 08:23 AM

Re: Building oven around a clay dome?
 
There are plenty of ovens here that have no gabled or roofed enclosure. If you are insulating with a blanket or mineral wool, you would need a cladding to act as a substrate for your finish of choice.

One of the best ways is to use vermiculite or perlite mixed with portland, because it provides an insulating structural layer, suitable for many kinds of material.

As to what you use to finish it...use your imagination. You can create a mosaic with pebbles or tile, stone, brick,tumbled glass, pottery, sea shells, stucco,etc,etc,etc.

69firebird 08-17-2013 08:54 AM

Re: Building oven around a clay dome?
 
Quote:

Originally Posted by thickstrings (Post 159644)
I looked at one of those about a year ago...It was suggested to me at that time that it would need more mass to retain heat and a layer of brick might be needed in the floor. I did'nt buy it PhotoPlog - Dome and Floor

That was the pc I had in mind...what would cause it to crack?

thickstrings 08-17-2013 09:09 AM

Re: Building oven around a clay dome?
 
I did'nt refer to any cracking....It was said to me that it needed more mass to retain heat,as the clay is only 1 1/2" thick, so a firebrick floor on the inside would give you that. Also, it would give you a opening closer to the magic 63%. , I found the old thread from a year ago... http://www.fornobravo.com/forum/f43/...ons-18189.html

69firebird 08-17-2013 09:43 AM

Re: Building oven around a clay dome?
 
Quote:

Originally Posted by thickstrings (Post 159650)
I did'nt refer to any cracking....It was said to me that it needed more mass to retain heat,as the clay is only 1 1/2" thick, so a firebrick floor on the inside would give you that. Also, it would give you a opening closer to the magic 63%. , I found the old thread from a year ago... http://www.fornobravo.com/forum/f43/...ons-18189.html

Sorry, there was a post under the pic link.

So adding firebrick to the floor isn't so bad I guess, is the due going to be thick enough if it were insulated well?

thickstrings 08-17-2013 10:39 AM

Re: Building oven around a clay dome?
 
Could be marginal...hard to say.....Like I said above...I did'nt buy it...You still have to fool around with it, and by the time your done ya could pretty near have a real one instead of a large flower pot who's abilities are questionable. If you are looking at a no brick, then look for a refractory modular one......Better properties than the clay......Just like the ones Forno Bravo sells...... Just noted the comment below the pic....I would have to agree,it would probably crack. Ever leave a clay pot out over winter?

UtahBeehiver 08-17-2013 11:17 AM

Re: Building oven around a clay dome?
 
69,

Is the "brick thing" due to masonary skills, if so there are many of use that never laid a brick before embarking on a WFO build and we made some D&*m nice ovens. Is it tools, there have been ovens made with brick chisel and a hammer, to full blown tool purchases cement mixers, wet saws, etc. depends on the budget. Budget, with patience and scounging, craiglist or Restore, a build can be done relatively inexpensive. Time, can't do nuttin about that :)

69firebird 08-17-2013 11:58 AM

Re: Building oven around a clay dome?
 
So, most of the ovens I've seen on here it's all the multi angles cuts that really concern me. From past experience that doesn't turn out well for me, lol.

If it was just cutting brick in half and slapping g them in place sure no problem.

UtahBeehiver 08-17-2013 12:16 PM

Re: Building oven around a clay dome?
 
69,

Ovens can be done by for the most with hand split bricks. Take a look at the attached link by a build by Fabby, aka a Flabby. Just some options.

http://www.fornobravo.com/forum/21/4...tml#post148942


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