The works consist of insulating from the exterior of the buildings while allowing the grinding stones to appear on the stairwells on the facade in order to keep the original architectural aspect of this building complex. A complement of insulation of the attics will be carried out. Metal drills will be replaced by electrically controlled roller shutters. The bath heaters will be replaced by suction cup bath heaters. A hygro B-type VMC will be created. Eligible works include insulation of attics, insulation of facades and replacement of exterior carpentry