Serbia: Knauf Insulation Serbia has completed a Euro20m upgrade to its Surdulica stone wool plant. Production has restarted at the unit, according to SeeNews. The company has replaced equipment on the production line and chimney, and installed a new palletisation machine and a desulfurisation system, thereby increasing the recycling capacity of the factory. The investment also includes a new logistics building and a truck parking area. The company plans to hire 15 new employees from May 2023 to support the changes.