An ideal building skin, which has simplicity, flexibility and planarity, bolted systems provide an efficient barrier against weather ingress and can be designed to be aesthetically pleasing structures. It is an ideal system for roof or wall glazing, since drainage and cleaning is made easy by the totally flush exterior. Many innovative applications of bolted systems can be glazed at only 3-4 degrees from the horizontal, making it a multi-purpose façade solution for building designers. Working together, architect, fenestration engineer, structural engineers and glass manufacturer, make up the façade team and each skill is highly specialised. As our knowledge of façade technology develops with every new building challenge, the most complicated external walls can now be constructed with confidence.