Laminated partition for building applications

A laminated partition for building applications comprising uprights disposed at predeterminated intervals and, in each space between two adjacent uprights, a sandwich structure consisting of several layers of materials, said sandwich structure comprising a central layer or core consisting of at least one rectangular plate made of a first material having a low density and high sound and thermal insulation properties, and, on either side of said core, an intermediate layer consisting of at least one rigid rectangular plate having its vertical edges secured to said uprights and made of a second material having a density which is low, but higher than that of said first material, said second material having good sound and thermal insulation properties, and an external lining layer bonded to the outer surface of the adjacent intermediate layer and consisting of a non-inflammable material having good thermal insulation properties and a higher density than that of said intermediate layer, the density of said first material ranging from about 60 kg/m.sup.3 to about 120 kg/m.sup.3, the density of the second material of each intermediate layer ranging from about 300 kg/m.sup.3 to about 700 kg/m.sup.3, and the density of the non-inflammable material of each external linning layer ranging from about 800 kg/m.sup.3 to about 1,200 kg/m.sup.3.