Construction Éco-bâtiment, a family-owned company in Brossard, Qué., explored possibilities for volumetric modular for their multi-unit affordable housing project northwest of Montréal. …Éco-Bâtiment had been looking for a different construction method … not based on concrete with its high carbon footprint or on wood with its longevity and health problems for occupants such as mold and warping. Furthermore, it would be a construction process that would create less waste materials sent to landfills. Éco-bâtiment turned to ACAL System, a volumetric modular builder based in Québec that specializes in aluminium-framed units. …The collaboration between Construction Éco-bâtiment and ACAL resulted in what Miguel Vaillancourt, president of Construction Éco-bâtiment, called “a world-first” — a six-unit, three-storey residential complex named Lofts de l’Aluminium. The modules were built with such exact precision that the units were assembled onsite in just one day.