I have not always been a proponent of BIM, far from it. For a long time, and until a few years back, I thought that BIM was just an unnecessary complication, with limited added value as far as façade design and engineering are concerned. Without diving into it further, it seemed from the outside that BIM was simply a more complex method for documenting the façade design compared with simpler and more traditional approaches. Indeed, we had spent the better part of two decades designing façades first using hand-drawn sketches and manual computations, then subsequently using CAD applications for the production of drawings, along with finite element analysis software to speed up computations. Feeling comfortable with this state of play, I was for a while reluctant to explore alternative approaches to design documentation. After all, this method of work had proved effective in the delivery of projects for many years...