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  #91  
Old 11-18-2009, 07:44 AM
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Default Re: My Cast Refractory Oven Build

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Originally Posted by JoeyVelderrain View Post
I was thinking of going with 2" of perlcrete on the dome and then another 2" of stucco and just skipping the blankets, has anyone gone this route?
Hi Joey, I'd be doing at least 4" of perlcrete and this seems to be the prevailing opinion. Is there any reason why you want to keep the insulation down to 2" ?
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  #92  
Old 11-18-2009, 08:33 AM
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Location: North Louisiana
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Default Re: My Cast Refractory Oven Build

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Originally Posted by mr g View Post
Hi Joey, I'd be doing at least 4" of perlcrete and this seems to be the prevailing opinion. Is there any reason why you want to keep the insulation down to 2" ?
I was just trying to cut down on cost. by not buying the blankets. Perlcrete is really cheap so I should be able to do 4" on the dome. Will I still need to stucco over the 4" of perlcrete?
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  #93  
Old 11-18-2009, 08:40 AM
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Default Re: My Cast Refractory Oven Build

Hey Joey, the stucco will give you a nicer final finish and be more weather proof and won't absorb as much moisture.

Regards
Mr G.
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  #94  
Old 11-18-2009, 09:08 AM
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Default Re: My Cast Refractory Oven Build

Quote:
I was thinking of going with 2" of perlcrete on the dome and then another 2" of stucco and just skipping the blankets, has anyone gone this route?
Two inches of vermiculite concrete on top of your dome is not enough. Four inches is the recommended MINIMUM, and lots of us use more. If you're limited to two inches in your design, you have to use the refractory insulation blanket.

Two inches of perlcrete will leave you with a dome that eats wood, has trouble getting to pizza temperature, and will be too hot to safely touch in operation. Skimping on insulation is a false economy.
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  #95  
Old 11-18-2009, 05:55 PM
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Default Re: My Cast Refractory Oven Build

okay, well it looks like I have to cut 13 bricks....sigh...I have been dreading this.
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  #96  
Old 11-18-2009, 06:02 PM
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Default Re: My Cast Refractory Oven Build

fill it with cement (peri or verm icerete).... The oven wont be over that areas will it ??
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  #97  
Old 11-18-2009, 06:29 PM
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Default Re: My Cast Refractory Oven Build

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Originally Posted by ThisOldGarageNJ View Post
fill it with cement (peri or verm icerete).... The oven wont be over that areas will it ??
dang! great idea. only the oven wall will touch this area. That should work.
let me check that out.
thanks!
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  #98  
Old 11-18-2009, 06:36 PM
Il Pizzaiolo
 
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Default Re: My Cast Refractory Oven Build

hope it works !!!
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  #99  
Old 11-19-2009, 03:38 AM
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Default Re: My Cast Refractory Oven Build

Mr G,
Keep firing your oven and I think you'll find its performance improves. You'll probably find it will be less hot underneath the more you use it. It takes a lot longer than you would think to drive out all the moisture. Damp insulation does not perform well. The vermiculite takes about double the amount of water that normal concrete does and takes ages to dry it.
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  #100  
Old 11-19-2009, 05:04 PM
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Default Re: My Cast Refractory Oven Build

well, as they say in my country..."she ain't purdy but she's got alotta heart!"




next tep...loading the dome!
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