Founded 1937 — Hedehusene, Denmark
From a Danish Volcanic Discovery to a Global Building Science Company
ROCKWOOL's origin traces to the observation that volcanic lava, when disrupted by high winds, forms natural glass wool fibers — a phenomenon observed in Hawaiian volcanic activity. In 1937, Danish engineers replicated this process industrially, melting basalt rock at 1,600°C and spinning it into durable mineral fiber with natural fire resistance, thermal stability, and acoustic mass.
Over 85 years, that foundational process has been refined across 38 manufacturing facilities in 40+ countries, but the core principle has not changed: stone, unlike synthetic polymers, does not burn, does not compress permanently, and does not degrade over a building's lifetime under normal conditions.
1937
Founded in Denmark
38
Production facilities worldwide
40+
Countries served globally
10K+
Employees globally
