The reason I ask is, after studying picture after picture after picture of nesting boxes (Those that protrude on the out side of the coop) I hardly see anyone using weatherstripping. I'm at that stage in building my coop where I have to build the nesting boxes. I want a flip up top, and even though the boxes are at the east end of the coop, they will still be exposed to southern weather. It's raining right now, and through Friday, and I have time to ponder this next step, but those birds ain't getting any smaller!!! I can rebuild if I have to, but I'd prefer to build them strong and dry the first time around. Any thoughts would be appreciated, but they go in on Saturday. The wife is reclaiming her dusty garage!!