A metal building system has multiple spaced building sections connected by inner and outer batten panels. Each building section has two spaced frame elements connected by inner and outer skin panels. The frame elements have two walls and a roof. The batten and skin panels have a metal layer that faces away from the frame elements and an insulation layer that faces the frame elements. The skin panels are seamed to the frame element and the batten panels are seamed to the skin panels such that there is no metal to metal contact between the frame elements, the skin panels and the batten panels. Each building section can be assembled at ground level, rotated to a final upright position and anchored.