Casa BN is a renovation project of an existing building dating back to the late 1990s. Although relatively recent, the building presented several issues: the configuration of its existing volumes and the large interior spaces made it highly energy-intensive and not suited to contemporary living.
The intervention mainly concerned the external envelope, which was thermally insulated and redesigned to bring order to the plurality of pre-existing volumes. Simplifying the volumes by eliminating the complex system of pitched roofs also resulted in both an energy and structural improvement of the building.
Through the use of a strong chromatic dualism, the newly plastered volumes stand out and are highlighted in contrast to the pre-existing folded sheet metal volumes, which thus acquire an identity value. The existing black-colored portions become the backdrop from which the new white volumes emerge, designed primarily to shade and protect the façades while hosting green roofs and planters. The decision to integrate greenery into the building stemmed from the need to increase the amount of green space available to the house. Since the property does not allow for a large garden, greenery was also brought onto the building itself. Looking from the inside outwards, greenery is visible on all three levels: at ground level the garden, on the first floor the green roof, and on the second floor the planter vegetation. Vegetation thus becomes the common denominator of the project, establishing a constant and harmonious dialogue with the architecture.
Through solar studies, the spaces requiring greater shading during the summer and those benefiting from free solar gains during the winter were identified. Loggias were therefore created on the south-facing elevations, shaded in summer and sunny in winter. Furthermore, the integration of vegetation into the architectural composition not only mitigates summer overheating but also transforms the façades from arid vertical surfaces into natural spaces to be enjoyed at height. With a minimal yet carefully designed increase in glazed surfaces, it was possible to guarantee high levels of natural light during the colder season and to enhance the visual and spatial connection between indoor spaces and the surrounding greenery, while at the same time preserving the original placement of all the openings.