1. MATERIALS FOR BUILDING OUR WORLD April 2003

2. 2 LAFARGE IN BRIEF w World leader in building materials w World leader in its four divisions: no. 1 in Cement, no. 2 in Aggregates & Concrete, no. 1 in Roofing, no. 3 in Gypsum w Operates in 75 countries and employs 77,000 people w 2,120 industrial sites worldwide in 2001 w € 14.6 billion in sales in 2002 w Listed on Paris, London, Frankfurt, New York stock exchanges Profile and key figures

3. 3 FOUR DIVISIONS w Cement l Cement, hydraulic binder and lime product ranges designed to meet the needs of the construction industry and civil engineers. w Aggregates & Concrete l Aggregates, ready-mix concrete, and prefabricated concrete units, asphalt and paving for builders of engineering structures, roads, buildings, etc. Profile and key figures

4. 4 FOUR DIVISIONS w Roofing l Concrete, clay and metal roof tiles product ranges,roof system components and chimney systems w Gypsum l Plasterboard systems, gypsum blocks and sprayable plaster intended for construction finishings, new buildings and renovation Profile and key figures

5. 5 As at Dec. 31, 2002 Gypsum 8% Cement 48% Roofing 10% Aggregates & Concrete 33% SALES BY DIVISION Other 1% Profile and key figures

6. 6 Western Europe 41% Asia-Pacific 9% Africa / Indian Ocean 6% Latin America 5% North America 30% Mediterranean Basin 4% Central and Eastern Europe 5% 29% of sales are generated in emerging markets Profile and key figures SALES BY REGION As at Dec. 31, 2002

7. 7 Africa 9% Asia 14% North America 20% Mediterranean Basin 6% Central and Eastern Europe 12% Western Europe 33% Latin America 6% EMPLOYEES BY REGION 46% of all employees are in emerging countries Profile and key figures As at Dec. 31, 2002

8. 8 R&D: A GLOBAL STRUCTURE w Central Research Laboratory in France l Over 500 people around the world dedicated to research w A decentralized network of technical centers on 5 continents w A global budget of over € 100 million w A portfolio of several hundred patents Profile and key figures

9. 9 GLOBAL R&D PARTNERSHIPS w Canada: Laval, Sherbrooke w United States: MIT, Berkeley, Princeton, w France: framework agreement with the CNRS w Suisse: Ecole Polytechnique de Lausanne Profile and key figures

10. 10 Resident institutional investors 30.6% Individual shareholders 13.1% Non-resident institutional investors 54.9% Owm shares held 1.4% 247,000 individual shareholders, among which 19.4% are employees of the Group OWNERSHIP Profile and key figures Capital as at Dec. 31, 2002

11. 11 SALES AND NET OPERATING INCOME GROWTH Profile and key figures Sales Net operating income Income in millions of € Sales in billions of € (*) Operating income on ordinary activities of equity affiliates is no longer included in the Group's operating income. * * * * *

12. 12 LONG-TERM GROWTH STRATEGY 1956 North America Brazil 1959 Eastern Europe 1990 1976/1989 Western Europe + Indonesia 1995 Asia 1997 2001 Profile and key figures

13. 13 ACQUISITIONS & MAJOR PARTNERSHIPS IN 2002 w China l Investment in Chongquing / Acquisition of Shunfan - Cement w Germany - Eastern Europe l Acquisition of plasterboard activities of Gyproc - Gypsum w South Korea l Joint-venture with Tong Yang - Cement w Serbia and Slovenia l Acquisition of BFC and Cementarna Trbovlje - Cement w Thailand l Joint-venture Lafarge Siam Roofing - Roofing Profile and key figures

14. 14 NEW PRODUCTION UNITS IN 2002 w China l Dujiangyan - Cement w France l Ready-mix plant in Vaise - Aggregates and Concrete w Malaisia l Dengkil - Roofing w Poland l Gacki - Gypsum w United States l Sugar Creek (Missouri) Roberta (Alabama) - Cement Profile and key figures

15. 15 RANKED AS SECTOR LEADER BY MOST SOCIAL RESPONSIBILITY ANALYSTS w Highest sector score in the Dow Jones Sustainability Index w Selected for inclusion in the SAM Employee Ownership Index w Selected for inclusion in the new Ethibel Sustainability Index w Selected for inclusion in the FTSE4Good Europe and global Index A commitment to sustainable development

16. 16 ENVIRONMENTAL COMMITMENTS w Reduction of CO 2 emissions: target of reducing CO 2 emissions by 20% per ton of cement produced from 1990 to 2010 w Air emissions and local impact: target of a maximum of 50 mg/Nm3 for cement plant dust emissions w Energy consumption and alternative energies: 30% of cement plants are equipped for the use of alternative fuels w Implementation of environmental audits: in 2004, 100% of sites must have been subjected to environmental audits within the past 4 years w Rehabilitation of quarries: target of 80% of quarries deploying rehabilitation plans by 2004 A commitment to sustainable development

17. 17 STRATEGIC PARTNERSHIPS w WWF l Plan to reduce C0 2 emissions l Performance indicators and quantified objectives l Biodiversity strategy for quarry redevelopment l Contribution to Forests Reborn program l Local partnership agreements (China, Spain, Austria) w WBCSD* l A joint action plan to promote sustainable development in conjunction with nine of the world’s other leading cement producers (CSI: Cement Sustainability Initiative) A commitment to sustainable development * World Business Council for Sustainable Development

18. 18 CEMENT: KEY FIGURES w € 6,948 million in sales w 37,521 employees w 142 production sites in 42 countries l Businesses: Cement, hydraulic binder and lime product ranges designed to meet the needs of the construction industry and civil engineers Cement As at Dec. 31, 2002

19. 19 CEMENT SALES BY REGION Cement In millions of € North America 1,579 Western Europe 2,274 Sub-Sahara Africa / Indian Ocean 756 Latin America 502 Asia-Pacific 981 Mediterranean Basin 455 Central and Eastern Europe 401 As at Dec. 31, 2002

20. 20 CEMENT WORKFORCE BY REGION Cement As at Dec. 31, 2002 North America 3,653 Western Europe 7,876 Sub-Saharan Africa / Indian Ocean 5,957 Latin America 2,483 Asia-Pacific 7,535 Mediterranean Basin 3,670 Eastern Europe 6,350

21. 21 As at 31.12 2002 THE CEMENT DIVISION WORLDWIDE Cement

22. 22 AGGREGATES & CONCRETE: KEY FIGURES w € 4,768 million in sales w 21,069 employees w 674 quarries and 1,078 concrete plants in 23 countries l Businesses: Aggregates, ready-mix concrete, prefabricated concrete units, asphalt and paving for builders of engineering structures, roads, buildings, etc Aggregates & Concrete As at Dec. 31, 2002

23. 23 AGGREGATES & CONCRETE SALES BY REGION Aggregates & Concrete In millions of € Western Europe 1,856 Other countries 507 North America 1,405 As at Dec. 31, 2002

24. 24 AGGREGATES & CONCRETE WORKFORCE BY REGION Aggregates & Concrete North America 9,961 Western Europe 6,819 Sub-Saharan Africa / Indian Ocean 818 Latin America 1,455 Asia-Pacific 718 Mediterranean Basin 431 Eastern Europe 867 As at Dec. 31, 2002

25. 25 THE AGGREGATES & CONCRETE DIVISION WORLDWIDE Aggregates & Concrete As at Dec. 31, 2002

26. 26 ROOFING: KEY FIGURES w € 1,538 million in sales w 12,106 employees w 159 locations in 32 countries l Businesses: Concrete, clay and metal roof tile product lines, roof system components and chimney systems Roofing As at Dec. 31, 2002

27. 27 ROOFING: BREAKDOWN OF SALES Roofing Western Europe without Germany 714 Rest of the world 376 Germany 448 As at Dec. 31, 2002 In millions of €

28. 28 ROOFING WORKFORCE BY REGION Roofing North America 618 Western Europe 7,595 Sub-Saharan Africa / Indian Ocean 300 Latin America 449 Asia-Pacific 1,679 Mediterranean Basin 58 Eastern Europe 1,408 As at Dec. 31, 2002

29. 29 THE ROOFING DIVISION WORLDWIDE Roofing As at Dec. 31, 2002

30. 30 GYPSUM: KEY FIGURES w € 1,146 million in sales w 5,319 employees w 67 production sites in 22 countries l Businesses: Plasterboard systems, gypsum blocks and sprayable plaster intended for construction finishings, new buildings and renovation Gypsum As at Dec. 31, 2002

31. 31 GYPSUM SALES BY REGION Gypsum In millions of € Western Europe 604 Other countries 297 North America 245 As at Dec. 31, 2002

32. 32 GYPSUM WORKFORCE BY REGION Gypsum As at Dec. 31, 2002 North America 703 Western Europe 2,755 Latin America 180 Asia-Pacific 1,033 Mediterranean Basin 119 Eastern Europe 532

33. 33 THE GYPSUM DIVISION WORLDWIDE Gypsum As at Dec. 31, 2001

34. M a t e r i a l s f o r building our world www.lafarge.com