It doesn't grow much in the sense of enlarging its size, but it multiplies like crazy under proper conditions. Sounds hollow when tapped The test for doneness after baking. Relax, you'll know. Insert a thermometer and look for an internal temperature of 200F. Hearth Breads Breads that are baked without pans directly on the floor of the wood fired oven. In our kitchens that usually means putting the loaf on preheated tiles on an oven rack in the lowest third of the oven.
Pizza stones are another option.
I've never tried then because my reading has led me to believe their expense is not worth it. I use tiles. Another option is a cookie sheet or jelly roll pan, preheated with the oven. Using two pans nestled together gives further insurance from a burnt bottom. Corn meal is often used to keep the dough from sticking.