The plumbing company Prétôt SA from Le Locle has been working with HP Gasser AG for around 20 years. When it came to renewing the rooflights during a flat roof renovation project in the summer, the specialists from Lungern were quickly on board. And they did so on the time-honored roof of the metal processing company Robert Laminage SA, which was founded in 1836. In just one day, the 10 old glass domes (70 m2 in total) in Le Locle were replaced by HPG oecoline vario® elements with integrated sun protection. This also ensured the sealing of the flat roof over the valuable machines during the entire construction phase. After the regular three-week company vacations, Robert Laminage SA was then able to resume its work in bright and well-insulated rooms.