Conceived as a drape, the roof for Metz  acts as a skin, floating freely above the three linear boxes of program that make up the museum. High curvatures are used to inject more drama, whilst also functioning as a way to keep the roof-scape behaving as a membrane. The roof becomes a weaved surface, capable of both shell and bending action, adjusting and tensioning in each length to resist what it finds – an opportunist and ad-hoc approach that is thoroughly informal.