Abstract: The present disclosure relates to methods, apparatuses, and systems for manufacturing a building element. In one aspect, a molding system for forming a building element is provided. The molding system includes a mold having a base and a lid. The base includes a side wall; an adjustable internal side wall assembly comprising at least two internal side wall segments movable relative to the side wall and the other internal side wall segment and arranged in a piled stack; an end wall; and an adjustable internal end wall assembly comprising at least two internal end wall segments movable relative to the end wall and the other internal end wall segment and arranged in a piled stack. The side wall, the end wall, the floor, the lid, at least one internal end wall segment, and at least one internal side wall segment, co-operatively define a cuboid cavity for molding the building element.