#11  
Old 08-29-2007, 07:15 AM
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Default Re: Vermiculite Layer

Move whatever the little one got up there with. Toddler versus DYI project - the project always loses!
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  #12  
Old 08-29-2007, 12:14 PM
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Join Date: Jul 2007
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Default Re: Vermiculite Layer

I've secured the perimeter of the oven with razor wire and pungee sticks so he'll have to pole vault over or repell from a nearby tree.
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  #13  
Old 08-29-2007, 06:45 PM
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Default Re: Vermiculite Layer

:smile: LOL!



That only stops adults - toddlers are immune to anything they don't realize should kill them (unless Mom is there to scream in panic).

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  #14  
Old 08-30-2007, 10:00 AM
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Default Re: Vermiculite Layer

My 2nd attempt provided much better results. It is stiffer than a cork partly because I lowered the ratio to 4:1 and I got the right amountof water. I lowered the ratio because I wanted to ensure I could lay brick over the upcoming 3-day weekend. The layer does give and according to this chart-> Vermiculite Insulating Concrete--The Schundler Company I haven't lost much thermal conductivity (K factor). Hearth is comprised of 4" vermiculite concrete, 4" regular reinforced concrete, and 1/2" backerboard underneath. I had some scrap backerboard laying around so I thought why not.

One definite plus to the lower ratio is the set time of the layer. I poured it Tuesday night and I stood and walked around on it this morning without a crumb being disturbed.
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