Structural glass bonding in plastic windows makes the windows stiffer and increases productivity. Bonding improves the dimensional stability of the windows, even without steel reinforcement. With bonding technology, the design is no longer determined by the size of the steel reinforcement. Delicate frame structures for maximum sash frame sizes are possible. Sash frame heights of more than 2.5 m and weights up to 130 kg are possible without steel reinforcement. Permanent bonding of the glass and frame prevents settling of the window sash. On-site adjustment of the sash frames is not necessary. This saves money and increases utility. Reduced frame dimensions mean more glass, more light, and better thermal insulation. Conventional blocking in plastic windows is manual work. Automated glazing is possible with bonding technology. Automated glazing and minimal use of steel increase productivity.