Storage furniture for use in buildings and rooms with sloping walls that consist of at least one corpus unit, one functional unit, one leg/plinth system and one cover system that are prepared for assembly and final adaptation to the sloping wall; - wherein the corpus unit consists of an asymmetrical box meant to receive the furniture's functional units consisting of at least six pieces incl. a top piece, a back piece, a sloping piece connecting the top- and back pieces, a bottom piece connected to the back piece, and two side pieces each connected to top-, sloping-, back- and bottom pieces, - wherein the number of alternative functional units incl. e.g. doors, shelves and drawers for installation in the corpus unit, - wherein the leg/plinth system incl. a number of furniture legs of either fixed or variable height and/or a number of plinth plates to be fitted to the bottom of the corpus unit, characterized by - the cover plate system comprising at least one top piece and two side pieces to be fitted on the outside of the mentioned asymmetrical corpus unit, - wherein the width and length of the top piece are bigger than the width and length, respectively, of the top of the corpus unit and wherein the depth and height of the two side pieces are bigger than the depth and height, respectively, of the side of the corpus unit, - wherein the cover plate system has a number of prepared cutting lines (3a.1) to be used for adaptation of the cover plate system to the sloping wall, and it also has a calculation model (3a.6) for choice of cutting lines (3a.1) depending on the room's knee wall height and angle of sloping wall, - the mentioned cover plate system enabling adaptation and maintained finish of the furniture against the sloping wall of the room and including at least two or more types of pieces, i.e. top and side pieces. - wherein the corpus unit consists of an asymmetrical box meant to receive the furniture's functional units consisting of at least six pieces incl. a top piece, a back piece, a sloping piece connecting the top- and back pieces, a bottom piece connected to the back piece, and two side pieces each connected to top-, sloping-, back- and bottom pieces, - wherein the number of alternative functional units incl. e.g. doors, shelves and drawers for installation in the corpus unit, - wherein the leg/plinth system incl. a number of furniture legs of either fixed or variable height and/or a number of plinth plates to be fitted to the bottom of the corpus unit, characterized by - the cover plate system comprising at least one top piece and two side pieces to be fitted on the outside of the mentioned asymmetrical corpus unit, - wherein the width and length of the top piece are bigger than the width and length, respectively, of the top of the corpus unit and wherein the depth and height of the two side pieces are bigger than the depth and height, respectively, of the side of the corpus unit, - wherein the cover plate system has a number of prepared cutting lines (3a.1) to be used for adaptation of the cover plate system to the sloping wall, and it also has a calculation model (3a.6) for choice of cutting lines (3a.1) depending on the room's knee wall height and angle of sloping wall, - the mentioned cover plate system enabling adaptation and maintained finish of the furniture against the sloping wall of the room and including at least two or more types of pieces, i.e. top and side pieces.