Correction to Report on the first quarter of 2008: EBIT in the first quarter is DKK 337 million and not 377 as stated in the highlights. Release no. 10 - 2008 Report on the first quarter of 2008 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 22 May 2008 Report on the first quarter of 2008 for Rockwool International A/S Today the Board of Rockwool International A/S has approved the following report on the first quarter of 2008. Highlights * Sales in the first quarter decreased by 5% compared to the exceptional first quarter 2007. * EBIT in the first quarter is DKK 337 million which is a decrease of 45% compared to first quarter 2007. * Due to delay in construction projects in many countries for financing reasons, it is more difficult than usual to predict the development of the market. However, expectations for the year remain unchanged with sales at year 2007 level, net result after minority interests at DKK 1,300 million and capital expenditure at DKK 2,000 million. Further information: Gilles Maria, Chief Financial Officer