Mercier Building

The new headquarters of Post Luxembourg, which is located rue de Reims in the station district of Luxembourg City, consists of six above-ground levels for postal services with retail areas, a canteen, offices and a technical floor at roof level.

The building also has two underground levels covering the entire footprint area which hold parking spaces, technical rooms, archives and sanitary facilities, as well as a third partial underground level housing the tank for the sprinkler system. The building is “gold” certified under the German DGNB sustainability certification system.

• Earthworks partly on old underground galleries, through very hard category 7 rock, for the foundations and the sprinkler system tank;
• Underground water and sewerage networks, grounding, underground vertical sealing and insulation;
• Building structure in reinforced concrete;
• Watertight concrete of the main foundation plate and the underground car park slab using Bagrat KS300 silicate-based additive (which significantly improves the quality of the concrete) and surface treatment with Bagrat ES2K;
• Peripheral wall elevations of underground levels cast in place in water-repellent concrete against the excavation pit shoring;
• QA1 quality exposed concrete in a very light colour for the floor slabs with a lay-out pattern of 1.35m x 2.70m;
• Thermo-active concrete slab;
• Prefabricated staircases with exposed concrete landings and peripheral coved plinths;
• Prefabricated facade elements in Luxembourg sandstone colour, acid-etched surface for the base of the building (at ground floor level);
• Main portal frames in lattice girders with a span of 24.3m in hollow tubes for the glass roof over the atrium.