The refurbishment of the KIII building in Central Auckland involved structural strengthening and the addition of an extension to futureproof the building and make space for company growth.
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The new addition was designed to sit on top of the existing building and set back from the parapet to provide a terrace area on the existing roof. The extension came with a unique set of challenges with regard to achieving falls, gutters and the required number of outlets. As the roof of the existing building would provide the base for the terrace, a waterproofing solution that would be compatible with deck pedestals was required. In addition, the designers looked for options to reduce the fall on the terrace roof; while a two-degree membrane roof would be NZBC-compliant, it would leave little flexibility for roof drainage between the existing building and the new solution.
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“As we were dealing with the existing building, it was very difficult to achieve the 2 degrees required by the NZBC,” explains Architect James Craig, CraigBrothers Ltd. “We would have required two degree falls for that membrane roof, but with Nuraply 3PM we could use a one-degree fall leaving enough height for setdowns and gutters to fall to limited outlet locations.”

​For decking above the membrane, Nurajack deck pedestals were specified and installed, with pavers on top providing a level threshold to the new office floor. Previous experience with the product, along with the BRANZ appraisal for Nuraply 3PM with deck pedestals gave James confidence in the specification.
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The final result is a clean-look paved deck that conceals a clever waterproofing and drainage solution. “I think that the secret to achieving the very challenging task successfully was the three-way conversation between the architect, contractor and Nuralite,” says James. “I feel very confident in the job that Nuralite have done.”