#11  
Old 10-16-2008, 03:55 PM
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Default Re: new oven build

I think a couple of us used the BS - you can see a picture on my first page.

Les...
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  #12  
Old 10-16-2008, 03:57 PM
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Default Re: new oven build

One more thing to look at, if I may, is what Hendo was doing to gauge his dome ->> http://www.fornobravo.com/forum/28/h...ea-2573-2.html (Hendo's dome gauge -- nice idea)

That too, was just a wonderful idea, and if you have not seen that thread yet it is worth going though!

Good luck,
Travis
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  #13  
Old 10-18-2008, 11:21 AM
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Default Re: new oven build

do you thik you can put insulation board down {pink} then the FB blanket then the floor
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Old 10-18-2008, 12:00 PM
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Default Re: new oven build

Travis, thanks for the comments about the board system. The credit for the board system goes to Les. I stole that, as well as many other ideas, from his build. I found it worked very well, from bottom to top, to not only keep the dome round, but also helped briefly support the brick I was working on until the mortar set up.
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Old 10-18-2008, 01:51 PM
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Default Re: new oven build

Quote:
do you think you can put insulation board down {pink} then the FB blanket then the floor
No on both counts. The pink foam insulation board is not rated for hot environments, and will give off weird smells if it gets even a little bit hot.

The FB (or equivalent) blanket does not go under the oven. It will compress and force out the air, loosing it's insulation value, and your oven will sag and crack. You need 4" of vermiculite concrete, or two inches of rigid refractory board insulation.
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  #16  
Old 10-19-2008, 07:53 AM
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Default Re: new oven build

What if you double up on th floor with fire brick
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  #17  
Old 10-19-2008, 09:15 AM
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Default Re: new oven build

Sumu,

That won't change what's underneath it all. The firebrick and insulating level serve two purposes. The firebrick is a thermal mass to store heat. A thicker floor just means a longer time to heat up. The insulation will keep it from being lost below, resulting in a cold floor. Stick with the recommended insulation of either vermiculite/concrete or an insulating board designed for refractory applications.
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  #18  
Old 10-19-2008, 04:55 PM
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Default Re: new oven build

Quote:
Originally Posted by dmun View Post
No on both counts. The pink foam insulation board is not rated for hot environments, and will give off weird smells if it gets even a little bit hot.
It's probably worth pointing out that those weird smells also tend to be fairly toxic.
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  #19  
Old 10-20-2008, 03:57 PM
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Default Re: new oven build

i talked to a sales rep from a furnace place he said he had 1 inch mineral baord that i could double up on and it would be fine cost is 3.00 a square. 30.00 for 36" diameter. what do you think....
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  #20  
Old 10-20-2008, 04:33 PM
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Default Re: new oven build

Sumu,

I would get a hold of the specs and compare them to some from the forum that are known to work well. If you can get the name of the board he is referring to, you might track down someone who has had experience with that board. Some of them insulate well, but get really mushy if they inadvertently get damp.
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