The building sector is responsible for one third of global energy-related CO2 emissions, deriving both from operational energy use and the embodied carbon associated with extraction, manufacture, and assembly of materials. As energy efficiency and renewable technologies can reduce operational emissions, embodied carbon has become a main contributor to the environmental footprint of buildings. Within this context, the thesis explores the challenge of decarbonizing curtain wall facades through an integrated Life Cycle Assessment (LCA) approach that considers both embodied and operational carbon impacts. Glazing facades are one of the most carbon-intensive facade systems due to their reliance on energy-demanding materials such as glass and aluminium, both characterized by high emission factors and relatively short service lives.