Casfil, a leading plastics manufacturing company in Portugal with a strong export component, has established a new industrial unit in Santo Tirso dedicated to the production of a new generation of biaxially oriented plastic films for packaging. This singular project, representing a major investment in infrastructure and production capacity, was classified as a Project of National Interest (PIN).
The building is organized into three main functional areas: the production area, the administrative area, and the social area.
The production area occupies the entire ground floor within an autonomous zone. It was conceived “from the inside out,” carefully designed to meet the strict requirements of the equipment to be installed, most notably, the largest extruder in the Iberian Peninsula. This demanded the creation of a complex system of technical channels and special foundations. Loading and unloading operations were also meticulously planned in connection with this area, making use of the building’s existing dock.
The social areas, also located on the ground floor, include the entrance hall, cafeteria, restrooms, changing rooms with showers, and a metalworking workshop. These facilities were designed to foster community and comfort among employees, balancing functionality with openness.
The administrative areas, primarily located on the upper floor, comprise four main offices, restrooms, meeting rooms, a general open-plan workspace, and various support spaces for the company’s operations. With their sharp architectural lines and interplay of rigid geometric forms with natural light streaming from above, these areas aim to stand out in the landscape and break away from stereotypes of industrial “simplicity.” The result is an almost ethereal atmosphere that promotes clarity, focus, and refinement in the workplace.
Structurally, the administrative and social areas are developed in reinforced concrete. In the administrative zones, self-supporting concrete walls reinforce a sense of solidity and permanence, with exposed concrete façades highlighting the building’s contemporary architectural language. By contrast, the industrial pavilion employs a steel structure, offering the flexibility and strength required for its demanding production functions.
Externally, the building is framed by a vast plain of grass, its minimalist landscape design emphasizing the geometric clarity of the architecture. Paved access roads, parking areas, and green spaces complete the setting, creating a harmonious connection between the built environment and the natural surroundings, an intervention that balances industrial functionality with architectural ambition.