Stonemason Mark Whyte was recently onsite at the Sarjeant Gallery Te Whare o Rehua Whanganui in Queen's Park, assessing the condition of the historic building's limestone exterior.
The 100-year-old Sarjeant Gallery is closed for earthquake strengthening and construction of a new wing – Pataka o Sir Archie John Te Atawhai Taiaroa. As a heritage restoration expert specialising in the conservation and restoration of stone and brick buildings, monuments and memorials, Whyte has also worked on parts of the Christchurch Cathedral, which collapsed in the 2011 earthquakes.
Whyte was in Whanganui documenting the condition of the Oamaru sedimentary limestone that gallery is built with, determining causes of any deterioration and recommending appropriate repairs to be done.
Although there is damage to be repaired and ongoing maintenance to be done, he concluded the Sarjeant is one of the finest examples of this kind of stonework he has seen in New Zealand.
"P. Graham and Son were really good stonemasons, the horizontal lines on this structure are perfectly level. All the pointing gaps are even. The perps [the vertical gaps between the blocks] and the bedding joints [the horizontal layer on which the blocks are laid] are all even," he said.