Structural bonding of the glass to the sash frame stiffens the window. As a result, the glass supports the frame instead of the usual situation where the frame supports the glass. Reduced requirements to the structural strength for the sash frame enable numerous options for improved window structures. The face widths of the sash frames are narrower, which increases the incoming light and improves the insulation characteristics. Permanent secure bonding of the glass with the frame reduces maintenance costs because the structure retains its dimensional stability. Settling of the sash frames is largely excluded. Automation of the glazing process and reduction of steel reinforcement make enormous contributions to improved productivity in window manufacturing.