Abstract: This laminated partition for building applications comprises spaced uprights and, in each space formed between two uprights, a sandwich structure comprising a plurality of layers of materials, namely a central layer or core consisting of at least one rectangular plate of a first material having a low density and a high degree of sound and thermal insulation, and on either side of the core an intermediate layer consisting of at least one rigid rectangular plate having its vertical edges fastened to the uprights, and made of a second material having a density which is low but higher than that of the first material, said second material having good sound and thermal insulation properties, and an outer lining layer bonded to the outer surface of the adjacent intermediate layer and made of a non-inflammable material having good sound and thermal insulation properties, and a density higher than that of the second material.