Help Finding Clay or "Builders Mix" in Michigan
I've started building my outdoor bread oven from Denzer's "Build your own earth oven" book (the base has come along nicely!) but I didn't realize I was going to have such a hard time buying clay or a clay mix for the oven mix. I was hoping that digging on my property would turn up a decent mix, but it was all sand. I've called around landscape and brick suppliers and can't find any powered/dry clay or 'builders mix' that is specified in the book.
Can anyone point me in the right direction? I'd like to buy it locally (and would LOVE to buy it this weekend!). Even if you could point me in the right direction of what type of places would sell what I need, that would be great!