Release no. 12 - 2010 Report on the first half of 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 27 August 2010 Report on the first half of 2010 for Rockwool International A/S Today the Board of Directors of Rockwool International A/S has approved the following report on the first half of 2010. Highlights * Sales in the first half year at actual exchange rates increased by 5% compared to the same period in 2009, or 1% based on comparable number of working days. * EBIT in the first half of 2010 amounts to DKK 377 million which is an increase of DKK 200 million compared to the same period in 2009. * The Group now expects net sales for 2010 at actual exchange rates to be at the same level as last year. * The net result after minority interests for 2010 is now expected to be DKK 400 million compared to DKK 300 million as mentioned in the report of the first quarter 2010. * Capital expenditure including acquisitions is now expected to be in the range of DKK 1,600-1,700 million. Further information: Gilles Maria, Chief Financial Officer