Tristan Vitali wrote:
I'd think it's best to go with as dense and homogenous of a material as you can - straight (finer but gritty) sand and good clay, a little heavy on the sand - for at least an inch or two right around the heat source as it will conduct the heat a bit better and provide a better seal (less chance of thermal cracking). I'm a complete newbie to the hands-on though, so I might be wrong on some things I know limestone does break down at a somewhat attainable temp but pretty sure that's not too much of a threat outside the burn tunnel and heat riserr]Will the chipped lime stone work for the inner cob?
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