Overview of the top of the first module showing the pattern of the rebar. Rebar is held up about 2-3" from the surface of the roof mold for strength. The roof mold is fiberglass, with a gel coat to insure release from the concrete once it sets. The black tube is for a 21" Sun Dome solar light tube into the kitchen/dining area. It will be trimmed to length once 3" of earth is put on top of the roof.