A cabinet for a refrigerator appliance, said cabinet comprising: a. an inner casing wherein a cavity (111, 112) configured to receive food items to be stored is formed, b. an outer casing having a top wall, a bottom wall, a rear wall and side walls (116a, 116b), wherein said outer casing is joined to a front wall of said inner casing and the top wall, the bottom wall, the rear wall and the side walls (116a, 116b) of the outer casing are spaced apart from the inner casing so as to define with it a cavity to be filled with a thermally insulating material, wherein all the walls (116a, 116b, 117, 118, 119) forming the outer casing are made of a metal material, characterised in that strips made of a polymeric material or of aluminized cardboard are applied at the interfaces between neighboring metal walls, the strips being assembled by gluing or adhesive tape, wherein the top wall, the bottom wall and the rear wall of the outer casing are manufactured as a single piece obtained by bending a sheet metal steel panel, and wherein the side walls (116a, 116b) are manufactured as independent members of the outer casing and wherein the strips are applied along side edges of the top wall, bottom wall and rear wall and partially protrude from them. a. an inner casing wherein a cavity (111, 112) configured to receive food items to be stored is formed, b. an outer casing having a top wall, a bottom wall, a rear wall and side walls (116a, 116b), wherein said outer casing is joined to a front wall of said inner casing and the top wall, the bottom wall, the rear wall and the side walls (116a, 116b) of the outer casing are spaced apart from the inner casing so as to define with it a cavity to be filled with a thermally insulating material, wherein all the walls (116a, 116b, 117, 118, 119) forming the outer casing are made of a metal material, characterised in that strips made of a polymeric material or of aluminized cardboard are applied at the interfaces between neighboring metal walls, the strips being assembled by gluing or adhesive tape, wherein the top wall, the bottom wall and the rear wall of the outer casing are manufactured as a single piece obtained by bending a sheet metal steel panel, and wherein the side walls (116a, 116b) are manufactured as independent members of the outer casing and wherein the strips are applied along side edges of the top wall, bottom wall and rear wall and partially protrude from them. wherein said outer casing is joined to a front wall of said inner casing and the top wall, the bottom wall, the rear wall and the side walls (116a, 116b) of the outer casing are spaced apart from the inner casing so as to define with it a cavity to be filled with a thermally insulating material, wherein all the walls (116a, 116b, 117, 118, 119) forming the outer casing are made of a metal material, characterised in that strips made of a polymeric material or of aluminized cardboard are applied at the interfaces between neighboring metal walls, the strips being assembled by gluing or adhesive tape, wherein the top wall, the bottom wall and the rear wall of the outer casing are manufactured as a single piece obtained by bending a sheet metal steel panel, and wherein the side walls (116a, 116b) are manufactured as independent members of the outer casing and wherein the strips are applied along side edges of the top wall, bottom wall and rear wall and partially protrude from them.