My a-frame has one of the sides as the door. I built my a-frame with 8' sheets of plywood and now wish that I would have cut the side in half vertically (top to bottom) so that one door could be opened to check for eggs or clean the roosting area and the other end could be opened just to feed and water. That being said, the door is only 2/3 the height of the side piece so the hinged area is horizontal and about 24" up from the bottom of the plywood side. I use a small flap of an old tarp (just cut it about 6" x the length of your door) and used gorilla glue to attach it to the coop. I've not had any trouble with snow or rain, and goodness knows we've had way more than our fair share this year...today included!