I'm going to build a round house that backs on to a small hill (the hill is lower than the roof) I'm going to frame in the roof so that it slopes down to the hill. I plan to sheet it with plywood, then would like to cover it in mud and seed it so it blends in to the yard/hill. It's a fairly steep angle and I'm wondering how to waterproof it and build so that the mud doesn't run off?
