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(11)

EP 1 861 558 A1

(12)

(43) Date of publication: 05.12.2007 Bulletin 2007/49 (21) Application number: 06710127.9 (22) Date of filing: 21.03.2006

(51) International Patent Classification (IPC):  E04B 7/22(2006.01) E04D 13/16(2006.01) E04D 12/00(2006.01) E04D 1/36(2006.01) (86) International application number: PCT/GB2006/001016 (87) International publication number: WO 2006/100463 (28.09.2006 Gazette 2006/39)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 22.03.2005 GB 0505900 (71) Applicant: Lafarge Roofing Technical Centers Ltd Crawley, West Sussex RH10 9NZ (GB)	(72) Inventors: OBEROI, Bushan Kumar Surrey RH2 9LG (GB) BARBER, Cassian West Sussex RH13 9DQ (GB) (74) Representative: Gambell, Derek et al Graham Watt & Co LLP St Botolph's House 7-9 St Botolph's Road Sevenoaks Kent TN13 3AJ Sevenoaks Kent TN13 3AJ (GB)