The Dunedin Public Art Gallery needed a new roof. The existing one was a mixture of profiled metal and membrane installed on both ply and concrete substrates. The building had serious condensation issues and the old butyl membrane seams were letting in water thus deeming the roof-mounted plant susceptible of collapsing through the decaying timber substrate.
The Dunedin City Council set a strict brief for the Art Gallery’s new roof - improve (i) weather tightness and (ii) thermal efficiency. It was also paramount the new roofing solution to be installed without disrupting or removing the items housed in the building and that the building remained operational.
Viking WarmSpan was specified for this reason, but also because the lightweight nature of Viking WarmSpan would also significantly reduce the stress on the building without compromising its structural integrity.