These are pictures of the room at the same angle from outside the door looking in. The 3rd is facing the wall from the center of the room.
All of these things serve the purpose of making this Southwest facing room, which normally is used for germination and green growth more energy efficient and insect proof. The room on the other side of this wall faces the northeast and is used for finishing and controlling growth.
Next Post; Bill continues to make improvement on the greenhouse.