With the acquisition of the Genest group in Viry-Châtillon (Essonne), Fayat establishes itself in Paris and doubles both its workforces and sales. It adds new activities: industrial electricity and special foundations with Sefi. Founded in 1965, SEFI (Sondages – Etanchements – Forages – Injections, i.e. surveys, sealing, boring, grouting) becomes with the takeover SEFI (Société d'Etudes de Fondations et d'Injections, i.e. foundation and grouting surveying company).