Turnover: 50 Mio. € Capital: 15 Mio. € Staff: 350 Truck park: 50 Machine park: 250 Asphalt production (LU / BE / DE): 400,000 T. / year Civil engineering sites : 140 / year Asphalt sites : 520 / year

1898: Corneille Karp-Kneip founded his company. 1936: First use of white concrete with a finisher. 1950: Asphalt mixing plant in Oetrange, start of asphalt production. 1957: Ernest Thiry takes over the company. 1987: Takeover of the Karp-Kneip companies by the brothers Christian and François Thiry and creation of the limited liability companies Karp-Kneip construction and materials.