Our coop was a old shed. Floor is plywood... Probably about 4 inches off ground in most places. What does the ground and slope have to do with anything?
I'm starting to believe that's what's happening with ours. After a hard rain the floor is wet and there is no explanation. Rafters are dry... So where's it coming from?
Here's ours. It's a shed conversion.
We redid the roof and put up OSB. Also rebuilt the roosts.
We added a built in brooder box
And of course a new run that our 12 girls just love.