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31. The Deep, HullHull’s £45.5 million MillenniumCommission Lottery project – The Deep– the world’s only submarium whichincludes the deepest display tank inEurope, is roofed with Kalzip aluminiumstanding seam.Located at the confluence of the riversHull and Humber where it seems to risespectacularly out of the water, thisstrikingly unusual building wasdesigned by Sir Terry Farrell whodescribes its dramatic appearance as‘a geological monolith… a rock face’.Apart from its aesthetic statement, thedesign of The Deep was driven by theneed for tremendous strength – ithouses tanks containing 2,850 tonnesof water – and, in this exposedposition, the need to use only highlydurable external cladding materials.Kalzip 400 profile stucco embossedsheets manufactured from the highestquality aluminium alloy provideexceptional longevity with minimalmaintenance in this marineenvironment. Aluminium is noncorrosiveand can withstand prolongedexposure to wind-driven salt and sand.The architect also specified marinegrade aluminium panels alongsidevitrified glass for the wall cladding ofThe Deep.Almost 1800 square metres of Kalzipstanding seam complete with structuralsteel decking (colour coated white onthe inner surface), rock fibre insulationand a vapour control barrier comprisethe roof structure. A fall arrest systemwas also fitted to allow safe access tothe roof.Architect:Terry Farrell & PartnersApproved Teamkal contractor:SIAC Construction UK Ltd26 Kalzip coast to coast