To improve energy performance in buildings, DuPont has launched a new vapour control layer for airtightness. Offering adaptability to changes in humidity levels thanks to the widest vapour resistance span (0.26 MNs/g to more than 150 MNs/g) on the market, DuPont AirGuard Smart is suitable for both roof and wall applications, says the company. This airtight membrane has been developed …