Rodeca installed its polycarbonate panels on the GTB Lab. First the main roof, then the core and finally the circular GTB module. The material has the same insulation value as triple glazing and allows daylight into the building, but also has some advantageous reversible properties. It is not as fragile as glass and more than 10 times lighter. More importantly, the elements can be assembled and disassembled quickly, easily and with a minimum of waste. The reversible GTB Lab module shows that the CO2 emissions per m2 of facade are lower for the polycarbonate panel than for glass, and even lower the CO2 emissions avoided due to the lighter supporting structure.