My other "getting started question:"
I appreciate the purpose of isolating the hearth slab from the surroundings as shown in the pdf that James posted in the Yahoo group. However, my impression was that vermiculite/cement mix isn't very strong. In the pdf, the vermiculite/cement appears to be holding the weight of the entire assembly since the regular concrete dosn't extend over the block walls. Is this the case, or is a stack of blocks under the center of the thermal slab recommended?
Thanks!
I appreciate the purpose of isolating the hearth slab from the surroundings as shown in the pdf that James posted in the Yahoo group. However, my impression was that vermiculite/cement mix isn't very strong. In the pdf, the vermiculite/cement appears to be holding the weight of the entire assembly since the regular concrete dosn't extend over the block walls. Is this the case, or is a stack of blocks under the center of the thermal slab recommended?
Thanks!
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