And Elderoo, you know, if historical precedent is important to you, note that rabbit hutches are not traditionally built with much if any pitch to the roof, so is it possible that all of the century-old rabbit hutch designers knew what they were doing <ducking and running>
Dont duck and run from me Pat. If there is one person among many I respect, it's you. I listen when you talk.
Flat roofs on rabbits hutches? Is it safe to say that rabbits have the same needs as chickens? I dunno, I never raised them. I AM willing to say nothing is written in stone
Im not saying that you should put a 6:1 pitch and architectural shingles on any coop. Hell, felt and tar would do nicely.
But most are intended to be both permanent and confined, as you and I have noted many times. That being said, it is only prudent that moisture outside the water fonts is to be avoided. I cant imagine that would differ for rabbits. It could be that tradition only repeats what it has already known - good or bad. That is, I might add, the only real danger in blindly following it.
Pitch the roof; a simple shed design will do . Don't fight this one. It won't add significantly to your costs or labor and, well - what's it gonna hurt?