Corrugated metal roofing was laid lengthwise on the roof framing, matching the curve of the battens. I had planned to use white or other light colored roofing for minimum heat absorption, but the white or near-white shades available locally were so ugly I chose 'plantation green' instead (all colors had a white underside).
All the metal roofing pieces have been put on, but the ends are not yet trimmed. The roof sits up above the top of the wall all the way around the structure, allowing warm air to easily flow out from under the ceiling. The bottom of the wall is open between footings to allow air to flow in (or out) at the base of the wall as well.
The door frames are made of 1 3/8" metal tubing. I had them custom made to fit by a small local fence and gate company. The precision alignment of the doors is a primarily a result of getting the hinges perfectly plumb and square before they are plastered in place.
The door frames were covered with metal roofing to make the finished doors. This results in a reasonably light, very rigid and relatively durable utility building door. Here part of the roofing has been screwed in place on the frames.
The rear door with metal covering in place. The frame is sized to clear the roof and open flat against the rear wall. The metal covering the door has not yet been trimmed down to clear the roof. The metal slider bolt at the left edge of the opening slides into a hole drilled in the door frame.
Here is the completed building with the roofing trimmed and the front door covering and other door hardware (drop bolts, etc.) in place. The brackets for a 2x4 drop bar were welded on when the door frames were made.
Here is the completed building with the rear of the roof trimmed. The top edge of the metal on the rear door has also been trimmed, allowing it to open flat against the rear wall. A raingutter made from flexible plastic pipe sliced lengthwise and slid over the edge of the roofing remains to be added.