Oh, this is my brooder barn, as I call it, that we just recently remodeled. It all started over a year ago when I turned my 12 by 16 greenhouse into a place to hatch chicks. We put up walls and lots of insulation. Blew in 30 inches of insulation in the attic, 3 windows and a window in the door. I left the rock floor as is b/c it is about 12 inches deep in large gravel.