I am in the process of converting a standard wooden shed into a coop. It currently has the standard double doors most sheds have that are built out of the same siding that's on the walls. The doors are completely rotted out and will need to be replaced. I want to put a standard 36 inch nine lite house entry door instead of the shed doors that don't let any light in. The problem is they are expensive to buy new and I'm not having any luck finding one used. A friend offered me a storm door similar to this one from Home Depot. http://t.homedepot.com/p/EMCO-100-S...rm-Door-with-Hardware-E1SS-36X78WH/202840959/ my question is would this be warm or draft proof enough during the cold michigan winters or should I hold out for the house door?