This year, the waterproofi ng of the terraces of the Saint Serge building was restored, with the addition of highperformance thermal insulation; W following the purchase of a new offi ce building in Paris in  continued, with the installation on three levels of new terminal units to control fan convectors and the replacement of fl exible heating water supply pipes on six levels as part of work to stop water leakage; W replacement of lighting in IT rooms, offi ce areas and part of the technical area at SIC Beaucouzé by the installation of LED lighting resulting in lower power consumption and reduced heat emission.