Rockwool International A/S engages in the manufacture and development of stone wool. It operates through the Insulation and System segment. The Insulation segment includes interior building, façade, roof, industrial, and technical insulations. The Systems segment covers acoustic ceilings, cladding boards, engineered fibers, noise and vibration control, and horticultural substrates. The company was founded by H. J. Henriksen and Valdemar Kähler in 1909 and is headquartered in Hedehusene, Denmark.