(19)

(11)

EP 2 809 852 A1

(12)

(43) Date of publication: 10.12.2014 Bulletin 2014/50 (21) Application number: 13705225.4 (22) Date of filing: 21.01.2013

(51) International Patent Classification (IPC):  E04C 2/04(2006.01) E04B 2/70(2006.01) E04B 1/86(2006.01) (86) International application number: PCT/GB2013/050120 (87) International publication number: WO 2013/114076 (08.08.2013 Gazette 2013/32)

(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 Designated Extension States: BA ME (30) Priority: 03.02.2012 GB 201201940 07.08.2012 GB 201214127 (71) Applicant: Icopal Limited Manchester M32 0YL (GB)	(72) Inventors: NICHOLS, Austin Lee Flintshire Mold CH7 1UQ (GB) MACKENZIE, Roderick Kenneth Torquil Montreal, Québec H2T2WZ (CA) (74) Representative: Wilson, Peter  Murgitroyd & Company Scotland House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)