Like the above poster said, you don't need to use DE in the shavings but I usually do (not always). You can also use DE if the it starts to smell, just sprinkle all over the top of shavings, the chickens will do the rest. :-)
I try to keep at least 6" for cooler in the summer & warmer in the winter. I just remove droppings monthly under roosts & replace with DE & fresh shavings
Good for you Frostbite!! Most people seem to think they need to add heat. You keep them dry and out of drafts (that doesn't mean they can't have an open window) and they will be fine and very healthy.
I layer shavings as needed and only clean the coop out ..completely twice a year. We will shovel it out under the roosts if it gets bad in there but generally it is fine. I have had chickens in there for almost 5 years now and will dust with DE before putting down fresh shavings or whenever I...