Baking loaves covered - Clinical trial, uncontrolled.
We have had a stimulating and instructive discussion of methods of replicating the effects of commercial oven steam injection in home ovens. (See http://www.thefreshloaf.com/node/7192/humidity-versus-steam#comment-36522) I found it interesting that many home bakers have found coving the loaf during the first half of the bake to yield the best results - better oven spring, crisper, thinner crust, etc. So, I had to try it.
My first attempt was with a bread I have made many times - Jeff Hamelman's "Miche, Ponte-a-Calliere." I made it with King Arthur Flour's First Clear Flour. There would not have been room in the oven to bake two loaves, even if I had divided the dough, so there is no experimental control, other than my past experience. I baked this miche covered with the bottom of a large, oval enameled metal roasting pan for 30 minutes, then removed the pan and finished the baking for another 25 minutes.
Ponte-a-Calliere Miche Crumb
My conclusion is that this bread has as good a crust and crumb as any I've made but is not substantially different from the miches I've baked using hot water poured into a hot cast iron skillet after transferring the loaf to the baking stone. The crumb is a little less open than I wanted, but the dough was less slack. The weather has warmed up, and the flour was probably dryer. I should have added a bit more water.