After testing a single layer of quarry tiles, I decided to see if there was any benefit to stacking the tiles on top of each other. The theory is that a thicker stone holds heat better, which is why many bakers seek out the thickest baking stones they can find. I was pretty happy with the way the pizza baked on my single layer of quarry tiles, but wondered if a double layer would be better.
'quarry tiles' on Serious Eats
When my favorite pizza stone broke a while back, I started shopping for a new one. It wasn't long before I was mired in indecision. I knew it would take me a while to sort through details and narrow the field down a bit, so I opted for the super-cheap temporary fix—unglazed quarry tiles.