Abstract
While the years following the Second World War saw the building industry irreversibly move towards industrialization of its means of production, it is often forgotten that this modernization was made possible by a number of measures and provisions inaugurated during the Occupation. It was at this time that an administrative structure was put in place and a legislative and regulatory apparatus adopted, which would not be called into question after the Liberation. It was also a time when, deprived of the material means to act, many manufacturers took advantage of the long wait imposed by circumstances, prompting the engineer André Marini to say that the war was above all "an opportunity for technicians to withdraw into themselves, to make attempts and carry out research that prelude realizations". The actions taken in Vichy France were so decisive that they contributed to the elaboration of a doctrine and paved the way for the development of a real construction industry after 1945.
