This thesis explores a potential of using glass waste to   create a mono-material, energy-efficient façade system, addressing the   challenges of recycling contaminated glass and the thermal performance of   cast glass façades. The proposed concept uses a layered design, combining the   structural capacity of cast glass with the insulating properties of foam   glass. The layers are joined by fusing, maintaining circularity of the   component. The research combined experimental manufacturing of glass foams,   using different waste-glass streams, foaming agents, and firing parameters,   with hot-box thermal testing and thermal simulations of façade concepts. The   results showed that the thermal performance of the system is primarily   affected by porosity of foam glass, controlled through material composition   and manufacturing parameters. Based on these findings, a demountable façade   concept was developed, including its manufacturing, assembly, and detailing.   The project demonstrates that glass waste can be transformed into a circular   façade system that meets the thermal requirements of the Dutch Building   Decree, highlighting its potential for future energy-efficient building   applications.