The objective of this article is to analyse the construction of a house in Mexico City at the beginning of the 20th century, one of many in which historicist elements were employed, with a mansard-shaped roof incorporating modern techniques and procedures. Thus, the house is representative of the construction materials and techniques of the period. Documents in the archive of its architect, Manuel Cortina García, then associated with Ignacio Gorozpe, complemented by reports on the property, advertising, catalogues, and other cases in the same context, show that mansards were a specialty of suppliers and contractors of independent structures assembled on wall structures that combined metal components with wood, clad with stamped tiles made of patented zinc or galvanized iron sheets, mass- produced, and classified according to stylistic criteria for their international offering.