Tresa was founded in 1987 as an elevator maintenance company, and since then its growth has been uninterrupted. In 1989 it increased its market share and launched production of own components for repair, maintenance and installation of elevators. The increasing demand obligated them to move to Polígono de Roces, where they set up their factory and offices, in order to be able to increase the manufacture volume exponentially. In few years the staff multiplied, and national demand continued to grow. The last 10 years witnessed the constant and continuous opening of new offices to serve the great demand: Madrid, León, Valladolid, Berriozar and Santiago. In 2010 they acquired their first elevator company: Ascensores Gescogal, thus extending their coverage in the peninsular northwest with offices in A Coruña, Lugo and Pontevedra.