We developed a prototype desktop application for the design and nonlinear analysis of stratified glass and insulating multi-glazing, according to building codes. The core of the application uses our finite element solver, featuring geometrically nonlinear shell elements coupled by viscous-elastic interface elements for the PVB layers and a specific nonlinear procedure for the coupling between structural balance and fill-gas state equations. The graphical user interface shown in the picture below is a Python prototype developed for a client.