Wall for a sealed and thermally insulating tank

A wall for a sealed and thermally insulating tank for storing a liquefied gas, the wall comprising in succession, in a thickness direction of the wall;

• a thermally insulating barrier configured to be anchored on a load-bearing structure;
• and
• a sealing membrane which rests against the thermally insulating barrier, the sealing membrane being a corrugated sealing membrane comprising a first series of corrugations having first corrugations parallel to one another and a second series of corrugations having second corrugations parallel to one another and perpendicular to the first corrugations the sealing membrane comprising a plurality of planar zones each of which is defined between two adjacent first corrugations and between two adjacent second corrugations;
• wherein the thermally insulating barrier comprises:
• at least one support element;
• and
• a modular structure situated between the at least one support element and the sealing membrane, the modular structure being fixed against the at least one support element, the sealing membrane resting against the modular structure and being fixed to said modular structure, the modular structure comprising at least a first sheet and a second sheet, the sealing membrane comprising a first zone fixed to the first sheet and a second zone fixed to the second sheet, the first zone and the second zone corresponding to two adjacent planar zones, the first sheet being connected to the second sheet by a connection which offers a degree of freedom in translation in a direction perpendicular to the thickness direction of the wall and a degree of connection in the thickness direction of the wall.