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  #151  
Old 01-21-2013, 11:20 AM
Apprentice
 
Join Date: Jul 2009
Location: Cochrane, Alberta
Posts: 103
Default Re: Insulation Efficiency

You will be fine with that, as I posted earlier, forno bravo is now only supplying FB blanket for insulation with thier kits. It is an industrial grade product.
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  #152  
Old 01-22-2013, 12:59 PM
dimitrisbizakis's Avatar
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Join Date: Dec 2012
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Default Re: Insulation Efficiency

Thank you all for your help!
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  #153  
Old 03-01-2013, 08:13 AM
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Join Date: Dec 2012
Location: paradise,nl,canada
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Default Re: Insulation Efficiency

I would like to chime in. My oven has 2" of vermiculite/cement and then I filled the rest of the cavity with Roxul loosefill. I used the full bag and thickness varies 2-5".
I had a pork should in the oven and we got 20cm of snow over night. The next day I went out to dig out the pork and the snow had not even melted on the roof. It was still 225F inside the oven after 17 hrs and a snowstorm.
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  #154  
Old 03-02-2013, 12:07 PM
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Location: Richmond, VA
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Default Re: Insulation Efficiency

Any thoughts on the size of the vermiculite particles I am looking to use? (It will be mixed with portland and poured for the hearth (plus innsblock on top) and used as loose fill on top of 1-2" of ceramic blancket inside the structure.
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  #155  
Old 03-02-2013, 03:47 PM
Gulf's Avatar
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Location: Mississippi
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Default Re: Insulation Efficiency

Quote:
Originally Posted by sclancy View Post
Any thoughts on the size of the vermiculite particles I am looking to use? (It will be mixed with portland and poured for the hearth (plus innsblock on top) and used as loose fill on top of 1-2" of ceramic blancket inside the structure.
It appears to be coarse or at least medium grade. It will work just fine. More importantly, than the grade, is it the best price in bulk vermiculite for your area? I'm sure that you have read on the forum that independant plant nurseries are a good place to start. The chain stores in my area like Walmart, Home Depot, and Lowes are definately not he place to buy vermiculite. Though, I have heard of some regions that offer an attic insulation vermiculite that may be available for a good price for the oven. It is just not available in my neck of the woods .
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  #156  
Old 03-02-2013, 05:40 PM
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Join Date: Mar 2012
Location: Richmond, VA
Posts: 80
Default Re: Insulation Efficiency

I can get 60 cu ft locally for $140....way more than I need but the price is right so i m thinking maybe just 1" of blanket plus 8-10" vermic all around inside the enclosure.....
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  #157  
Old 03-02-2013, 05:46 PM
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Default Re: Insulation Efficiency

Id still be putting a 2" layer of blanket over the top and 1" around the outside.
Its what I did with mine then about 1' of loose vermiculite over the top and about 6" down the side.
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Last edited by brickie in oz; 03-03-2013 at 10:47 PM.
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  #158  
Old 03-03-2013, 08:26 AM
sclancy's Avatar
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Location: Richmond, VA
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Default Re: Insulation Efficiency

Al,

I didnt read all 16 pgs of this thread, but the original post in 2005 indicated to me that 1" of vermiculite is superior to 1" of insulfrax blanket (see below)....or am I reading this wrong?

I will have a "ton" of vermiculite at a very good price (they actually mine it nearby in VA and I am buying it "mine-direct") and could easily do 2" for every 1" of blanket that I am giving up as my oven will be quite a bit smaller than my full size size pompeii stand - the enclosure should leave me nearly 6-8" on the sides and as much height on top as I need to get another 8-10' on top of the dome.


1" Insulfrax Blanket 6#, 4" Vermiculite 1000F** 172F

2" Insulfrax Blanket 6#, 3" Vermiculite 1000F** 161F

3" Insulfrax Blanket 6#, 2" Vermiculite 1000F** 151F

4" Insulfrax Blanket 6#, 1" Vermiculite 1000F** 142F

5" Insulfrax Blanket 6# ******* 1000F** 135F



Quote:
Originally Posted by brickie in oz View Post
Id still be putting a 2" layer of blanket over the top and 1" around the outside.
Its what I did with mine then bout 1" of loose vermiculite over the top and about 6" down the side.
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  #159  
Old 03-03-2013, 09:34 PM
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Default Re: Insulation Efficiency

Quote:
Originally Posted by sclancy View Post
indicated to me that 1" of vermiculite is superior to 1" of insulfrax blanket
I believe that is wrong, blanket is far superior..
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  #160  
Old 03-03-2013, 10:35 PM
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Default Re: Insulation Efficiency

Quote:
Originally Posted by sclancy View Post
Al,

I didnt read all 16 pgs of this thread, but the original post in 2005 indicated to me that 1" of vermiculite is superior to 1" of insulfrax blanket (see below)....or am I reading this wrong?
Yes, I think you are reading it wrong. The blanket is about twice as good as the vermiculite so if you use it (vermiculite) you will need double the thickness to achieve the same insulating value.
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