In March 2023, the Winter Gardens were fully re-opened to the public following a complex two-year project to seismically upgrade and undertake major repairs and improvements to the glasshouses and wider site. The repairs and strengthening works were complex and required a number of changes to the structures, which have been carried out with the utmost care and attention to detail to ensure that the heritage values of the place have been protected and enhanced. This icon site has been conserved for the future. This has been accomplished on time and within the original estimates on behalf of Auckland Council.
The restoration works to the exterior followed the completion of new rail tunnels beneath the building as part of the major City Rail Link (CRL) transportation scheme. Our professional heritage services and comprehensive documentation guided the repairs to the external fabric of the building.
The project was conservation-led, requiring careful decisions regarding material selection and the extent of intervention required to preserve the original heritage fabric. This considered the anticipated lifespan of the repairs alongside the future maintenance needs of the building, ensuring a balanced approach. The stone faces underwent a meticulous cleaning process to restore their original appearance, and the restoration of the exterior façade involved the skillful piecing in of new Oamaru stone to replace decayed material, following time-honoured techniques of repair.
In addition to stone conservation and cleaning, architectural embellishments that had worn surfaces were reinstated through the application of a complete new fines coat to the plaster elevations; traditional Neuchatel mastic asphalt replaced failing roofing membranes; projecting parapet ledges and cornices were fitted with new lead sheet capping to resolve water damage; and a full restoration of the steel window joinery was undertaken, involving careful bare metal preparation and repainting.
OCTA Project Management were responsible for the overall project on behalf of Auckland Transport.
