(19)

(11)

EP 2 542 729 A1

(12)

(43) Date of publication: 09.01.2013 Bulletin 2013/02 (21) Application number: 11710007.3 (22) Date of filing: 01.03.2011

(51) International Patent Classification (IPC):  E04B 1/76(2006.01) E04C 2/52(2006.01) E04B 1/80(2006.01) (86) International application number: PCT/GB2011/000276 (87) International publication number: WO 2011/107731 (09.09.2011 Gazette 2011/36)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 24.09.2010 GB 201016082 23.04.2010 WO PCT/GB2010/050669 01.03.2010 GB 201003383 (71) Applicant: Energyflo Construction Technologies Limited Edinburgh EH2 3NH (GB)	(72) Inventors: BROWN, Alexander Aberdeen AB51 0RQ (GB) PEACOCK, Andrew Edinburgh EH15 2BA (GB) (74) Representative: Kinsler, Maureen Catherine  Marks & Clerk LLP Aurora 120 Bothwell Street Glasgow G2 7JS Glasgow G2 7JS (GB)