Composite thermal insulation module for lining a building wall or defining a building partition, comprising: - retaining means (M1, M2, 5; M1', 5') suitable for forming all or part of a side periphery of the module, - a cover having a first end and a second end opposite the first end, - an inner space delimited by the retaining means (M1, M2, 5; M1', 5') and the cover in a first configuration in which the inner space is closed, - at least one insulation panel in the shape of a board and having two main faces (F1, F2) and two opposite edges (31, 32) which are preferably parallel, said insulation panel being housed inside the inner space at least in the first configuration, such that the cover covers, in the first configuration, all or part of a determined face chosen from among the two main faces (F1, F2); the second end of the cover being capable of moving between the first closed configuration and a second configuration allowing access to the inner space, the cover being: - articulated such that it alternatively moves the second end further away from and closer to one of the two edges, while maintaining all or part of the first end in a position in which it is fastened to the retaining means (M1, M2, 5; M1', 5'), and - suitable for allowing an inspection of said determined face of the insulation panel to take place in the second configuration, characterised in that the insulation panel comprises a porous material capable of withstanding compression and a gas-tight barrier shell closed under a vacuum, which encloses the porous material, the module further comprising removable fastening means for locking in the first closed configuration, which corresponds to a closed state of the module, the mobility between the first closed configuration and a second configuration allowing access to the inner space being obtained by unlocking the removable fastening means, the inspection of said determined face of the insulation panel in the second configuration being possible after each unlocking operation. - retaining means (M1, M2, 5; M1', 5') suitable for forming all or part of a side periphery of the module, - a cover having a first end and a second end opposite the first end, - an inner space delimited by the retaining means (M1, M2, 5; M1', 5') and the cover in a first configuration in which the inner space is closed, - at least one insulation panel in the shape of a board and having two main faces (F1, F2) and two opposite edges (31, 32) which are preferably parallel, said insulation panel being housed inside the inner space at least in the first configuration, such that the cover covers, in the first configuration, all or part of a determined face chosen from among the two main faces (F1, F2); the second end of the cover being capable of moving between the first closed configuration and a second configuration allowing access to the inner space, the cover being: - articulated such that it alternatively moves the second end further away from and closer to one of the two edges, while maintaining all or part of the first end in a position in which it is fastened to the retaining means (M1, M2, 5; M1', 5'), and - suitable for allowing an inspection of said determined face of the insulation panel to take place in the second configuration, characterised in that the insulation panel comprises a porous material capable of withstanding compression and a gas-tight barrier shell closed under a vacuum, which encloses the porous material, the module further comprising removable fastening means for locking in the first closed configuration, which corresponds to a closed state of the module, the mobility between the first closed configuration and a second configuration allowing access to the inner space being obtained by unlocking the removable fastening means, the inspection of said determined face of the insulation panel in the second configuration being possible after each unlocking operation.