I think what you said in your reply to my post said it all regarding condensation on the coop roof: Still Air. If there is no air moving, then you'll get that condensation. All metal roofs are going to have a bit of it because like you say, sun heats it, top is hot and under is cooler. But when air is moving, it dries. So the shaded roof doesn't get it, but the one in the sun does. I've been in them when there was moisture underneath and we would just say "wow" and not worry about it. This being because it was unusual and never happened when it mattered, i.e. freezing weather.I dont know if this is pertinent but our coop roof is metal roofing left over from the house roof on the underside and the deck is over top of it and it never gets condensation. I wonder if it is the temp being hot on the top of the metal, exposed to sun, and cooler on the underside inside makes it happen?So in our case the deck shades the metal and it never gets hot???