| 1937 |
Manufacture of stone wool is initiated in Hedehusene, Denmark, and Skövde, Sweden |
| 1938 |
Start of production in Larvik, Norway |
| 1954 |
Expansion into a vital market: Germany. Deutsche Rockwool starts production in Gladbeck, Germany |
| 1962 |
Introduction of Rockfon acoustic ceilings |
| 1969 |
Grodan cultivation substrates are added to the Group's product programme |
| 1971 |
The Group aquires the Dutch company Rockwool Lapinus. This company's factory in Roermond has now become the world's largest stone wool factory |
| 1979 |
The Group builds a new factory in Bridgend, Wales |
| 1980 |
Inauguration of the Group's new factory in St. Eloy-les-Mines, France |
| 1985 |
Rockwool acquires a new stone wool factory in Münster, Germany |
| 1988 |
The first factory outside Europe is acquired: Roxul Inc. in Ontario, Canada |
| 1991 |
The Group expands to Eastern Europe. Deutsche Rockwool acquires the stone wool factory in Flechtingen, the largest stone wool factory in former East Germany |
| 1993 |
Rockwool International A/S enters into a joint venture for Poland's largest stone wool factory, located in Cigacice in Western Poland |
| 1995 |
The Group acquires the stone wool factory in Malkinia, which is in Eastern Poland |
| 1997 |
The Group acquires a stone wool factory in Hungaria |
| 1998 |
The Group acquires the second largest mineral wool factory in the Czech Republic |
| 1999 |
The NEE Subdivision together with the Investment Fund for Central and Eastern Europe takes over Russia's largest stone wool factory |
| 1999 |
The Group starts construction of a new stone wool factory in Caparosso in the Navarra region of Spain. When production at the new factory begins in the autumn of 2000 it is the worlds most efficient stone wool factory |
| 1999 |
The Group acquires a stone wool factory in Sardinia, Italy |
|
1999 |
The Group acquires its second factory in North America. The factory is situated in Grand Forks, British Columbia in Western Canada |
| 2000 |
The Group and The Industrialisation Fund for Developing Countries acquires its first factory in the Far East. The stone wool factory is situated in Melaka, Malaysia |
