The history of Sice Previt has distant roots. After the First World War, Giovanni Tonini, originating from Trentino, worked as a designer and director of projects for dams and hydroelectric power plants at the Omodeo engineering office in Milan. The works carried out, both in Italy and abroad, are great works of transformation of the territory. These are the years of the first earthquake-proof dams, where the innovative capacity combined with experience allowed to build great works with little machinery and many hard-working people. After the experience gained in SIAF, where he specialized in the design of aqueducts, he founded the first company in the history of the Tonini family, “Tonini & Colombo”, a company operating in the field of hydraulic works.
Following the Second World War and in a country in need of reconstruction, Tonini founded a new construction company, “Ditta Ing. Tonini”. Tonini’s strength and determination are to be found in his great passion for the mountains, in his commitment to life, comparable to the care needed when climbing , in his sense of freedom and justice and in his pride of belonging to the Corpo degli Alpini ( Italian alpine trooper ). These values, along with honesty and reliability,not only do they constitute the foundations of Sice Previt , but also leade it still today.
In 1961  Ing. Tonini founded Sice Srl (Società Italiana Costruzioni Edili) and Previt S.p.A. (Prefabbricati Vermiculite Italiana) in which his son Leonardo Tonini used to work, a highly specialized engineer to whom we owe the development of the industrial prefabrication branch.
In addition to his activity as a builder, Leonardo Tonini started, in the seventies and eighties, several entrepreneurial initiatives aimed at the diffusion of new construction systems. Later on, together with other entrepreneurs, he has founded several companies, operating in Italy and abroad, which spread new construction ideas resulting from the comparison among  different professional skills.