(19)

(11)

EP 0 988 429 A1

(12)

(43) Date of publication: 29.03.2000 Bulletin 2000/13 (21) Application number: 98929556.3 (22) Date of filing: 15.06.1998

(51) International Patent Classification (IPC)7: E04B 1/94 (86) International application number: PCT/GB9801/733 (87) International publication number: WO 9857/000 (17.12.1998 Gazette 1998/50)

(84) Designated Contracting States: AT BE DE DK GB NL (30) Priority: 13.06.1997 EP 97304156 (71) Applicant: Rockwool Limited Mid GlamorganCR35 6NY Wales (GB)	(72) Inventors: OSMOND, Christopher Cardiff CF4 9EJ (GB) FRANCIS, Kenneth, Ian Mid Glamorgan CF35 5DS (GB) (74) Representative: Jones, Helen Marjorie Meredith  Gill Jennings & Every,Broadgate House,7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)