Since 2001, Smartglass International has manufactured made-to-order switchable glass that can change privacy, light and solar control at the flick of a switch. From its 10,000-square-metre specialist facility in Ireland, the company processes and finishes every unit in-house, hand-checking each one before shipping it with a five-year guarantee. Its work has travelled to 35 countries, including bespoke glazing for CERN’s Globe of Science & Innovation and Edinburgh’s historic McEwan Hall.