opinion about using corrugated shaded roof?

[Srawl]

My coop is only about 3 ft tall on the upper level (has a 2 ft tall lower level/ small run area) and about 3'x4' of floor not counting the nest box.

Would plywood be a better option?

 

[Shanty]

Yes if you put roofing felt and a light colored (white) roll roofing on top of the plywood. Again, if your pen gets some shade then you have more leeway; if it is in direct sun all day, then I'd also add some foam insulation panels UNDER the plywood. I know this sounds like a hassle but the chickens need to stay cool or you won't get any eggs no matter how much daylight they experience. Will you attach a run? I'd suggest a PVC and wire run with some shade cloth.



Here's a large example from the Net; a smaller version would help you in your situation.

 

[RelaxGeorgetown]

IF your coop has a high roof line with lots of dead air space the corrugated metal roofing works well. If 6' high or less--yes, I've seen less--it will not work unless you get afternoon shade. If your coop is UNDER some trees then the corrugated plastic MIGHT work. Any direct sun will tend to bake whatever is underneath--think greenhouse here.

Agreed

Metal roof will absorb heat and transfer it into coop, use some foam sheet insulation with foil towards roof under metal roof to aviod this issue

I guess I should have mentioned that. I have plywood under the metal and radiant barrier below that