Release no. 06 - 2009 To NASDAQ OMX Nordic Exchange Copenhagen This is a translation of the Danish version. Only the Danish version is legally binding. ROCKWOOL INTERNATIONAL A/S Hovedgaden 584, Entrance C DK2640 Hedehusene Phone: +45 4656 0300 www.rockwool.com 05 May 2009 Statement from the Rockwool Foundation Today Rockwool International A/S received copy of the below statement from the Rockwool Foundation to the Danish Financial Supervisory Authority: ”To increase the liquidity of Rockwool International's shares, the Rockwool Foundation in September 2005 decided to agree to exchange other shareholders' A shares for Rockwool Foundation B shares. This would be carried out at the same share price and without accepting any trade charges for up to 600,000 B shares provided the exchange would take place before 1 September 2009. The Rockwool Foundation's board has decided to extend the present exchange agreement until 15 April 2013 or until the depletion of B shares available. In this connection the Foundation's board has decided to make more B shares available so that as of 15 April 2009 there will again be 600,000 B shares available for the exchange for A shares. Since the company was listed on the Copenhagen Stock Exchange in 1996, A and B shares were traded at about the same price. It was and continues to be the Rockwool Foundation's intention that the offer will link the trade prices of the two share classes closely together, with the effect that the actual prices for both share classes - due to the joint volume - will be more transparent and thus even more stable. The Rockwool Foundation reserves its right to withdraw this present offer, due to changed tax conditions or other reasons, by a new statement to The Danish Financial Supervisory Authority (and the NASDAQ OMX Nordic Exchange Copenhagen). Each A share is entitled to ten votes, and each B share to one vote. B shares are entitled to an advance dividend of DKK 0.50 per share, which so far has been of no importance. The share capital of the company is about 13.073 million A shares and 8.902 million B shares. This corresponds to 59.5% and 40.5%, respectively, of the shares. The Foundation has 4.292 million A shares and 0.785 million B shares, which corresponds to 19.5% and 3.6%, respectively, of the share capital, i.e. total of 23.1% of the share capital and about 31.3% of the votes. Until further notice it has been agreed with Danske Bank A/S and Nordea Bank Danmark A/S that these two banks will deal with the exchange for stockbrokers and shareholders according to the enclosed procedure. Tom Kähler Lars Nørby Johansen Chairman Deputy Chairman” Further information: Tom Kähler Chairman of the Rockwool Foundation +45 46 56 03 00 For the received enclosure, please see the PDF.