Release no. 10 - 2010 To NASDAQ OMX Nordic Exchange Copenhagen A/S 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 Danish CVR no: 54879415 09 June 2010 Updated financial calendar for the remaining of 2010 Rockwool International A/S expects the presentation of accounts as well as investor and press meetings with web casts to take place on the below dates for the remaining of 2010: Silence period before Q2 6 August - 27 August 2010 Report on the 1st half-year of 2010 27 August 2010 Investor and press meeting with audio transmission at our web-site 27 August 2010 Investor and press meeting with video transmission at our web-site 30 August 2010 Silence period before Q3 26 October - 16 November 2010 Report on the 1st-3rd quarter of 2010 16 November 2010 Investor and press meeting with audio transmission at our web-site 16 November 2010 Receive an email alert when our financial calendar is updated, for instance with an estimated release time or phone numbers for an audio conference. Subscribe to our email service here: http://www.rockwool.com/investor/calendar Further information: Thorkild Diness Jensen Vice President, Group Branding & Communications Rockwool International A/S +45 46 56 03 00