These pictures show how the exposed foundation wall, which is proud of the main stud wall covered with styrofoam insulation to make it even further outstanding has been covered. I used 4 inch wide by 1 5/8 inch thick spruce lumber with a recess cut on one side to top the covering and OSB to cover the sides. The OSB is glued against the styrofoam. Since the floor of the workshop is slightly sloped to the door the OSB had to be cut to fit. The spruce lumber was toenailed with screws to the walls.