Homogeneous ceiling with PREGY partitions and linings with a smooth surface, without visible joints and suitable for any type of finish. Flexible bonding technique capable of absorbing the usual deformations or movements of the supporting structure without disturbing the ceiling. Addition of mineral wool mattresses and adjustment of the height of the plenums according to thermal and acoustic constraints. Modulation of the fire resistance of the floors and frames according to the composition of the ceiling.