Our plan was to pour our hearth with 4 inches of reinforced concrete for strength, then a perlite/portland blend layer of five inches on top of that, then the 2 inch tiles from Maurice on top of that... We could get enough offcuts to make the tiles double thick.. Think that'd be enough? His hearths are 3 inches of perlite/portland/sand on the bottom, three inches of regular cement on top of that, then the 2 inch firebrick tiles. He says that works, but I don't want my oven to just work, I want it so sing. Found materials only go so far. If it takes money to get the correct materials, we'll spend money to do it right, we're just trying our best to do this thing as earth friendly as possible, whilst building a cutting edge pizza oven.
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