The Original Movable Wall Company. M/W International, Inc. presents the total package in facility management utilizing floor to ceiling, demountable partitions and integrated office furniture systems. MWI's integrated product lines last longer, have better warranties, and are less costly than comparable gypsum wall construction. Since our inception in 1921, and the advent demountable partitions in 1932, MWI has been supplying businesses with powerful design alternatives to save time and money for initial installations and all future moves.