Because operations at the Glattzentrum in Wallisellen must continue to run smoothly, the contracting process will drag on for the entire four-year conversion phase. "In some cases, certain areas such as parking floors or entire shops will be closed so that we can install the door systems during this time," says project manager Patrick Känzig, explaining the biggest challenges. Gilgen is supplying a total of 50 fire protection and escape route doors for external closures or the individual shops. "Our task is to be as flexible as possible in the staged construction. Sometimes we have to adapt to the ongoing construction phases and proactively ask when it's our turn," says Patrick Känzig, explaining Gilgen's strategy. In 2022, the Glattzentrum should shine in new splendour - with Gilgen as the door opener.