I finally bit the bullet and decided to prototype a curved green roof. I set myself a very limited budget, and the resulting prototype is an experiment, not an actual roof structure. It is a testbed for trying out some ideas.
The underlying structure.
Early prototyping.
The waterproof membrane.
The parts.
The mesh framework for holding the soil.
Material to keep the soil from washing out.
The mesh in place and the soaker hose added.
Adding the soil.
Grass mixture added.