Release no. 10 - 2007 To the Copenhagen Stock Exchange This is a translation of the Danish version. Only the Danish version is legally binding. ROCKWOOL INTERNATIONAL A/S Hovedgaden 584, Entrance C DK 2640 Hedehusene Phone: +45 4656 0300 www.rockwool.com 1 June 2007 Voting Rights and Share Capital Pursuant to § 17, 2) in Executive Order No. 226 of 15 March 2007 on Obligations of Issuers, it is hereby informed that Rockwool International A/S' total nominal share capital amounts to DKK 219,749,230, divided into 13,072,800 A-shares of DKK 10 and 8.902.123 B-shares of DKK 10. The total voting rights are 139,630,123 as 1 A-share is entitled to 10 votes and 1 B-share is entitled to 1 vote. Further information: Vice President, Group Legal Department Per Palludan