We got our clear panels from Home Depot. These are the kinds used for porches, etc. The "barn" is more like an enclosed shed, so the panels are on a straight, sloping run to the back of the building. The wavy feature lets rainwater channel into the gutter and then to a rain barrel for the garden & all the critters in the vicinity.
What's so nice about the *clear* panels is that it lets the sun in and really warms the place up. Our air temp is 25 F right now, with windchills making it in the low teens, but inside the barn is comfy and inside the coop itself (now open so the girls can still do their duty) is a balmy 45 F. There's no barn door as I couldn't decided if I wanted swing or slide, the windows aren't tight and there are gaps along the roof line. So there's plenty of ventilation & the inside is nice & dry, especially the ground.
The bees are in hibernation mode right now but the way I have the hives set up, they enter & exit thru a slot in the eastern wall. So even if they do get a little active on an occasional warm winter day, they're facing out of the barn & away from the hens. The only bad part is when summer comes & it's about 100 in there. The bees don't mind, but I sweat off a couple gallons when I'm working them in the full moon suit as it is. Needless to say, I work them early in the morning.
fyi, the hens will be going back to their regular yard once winter is over.