As part of Auckland Transport’s commitment to future-proofing urban infrastructure, the Puhinui Station Interchange was enhanced with a lush green roof system – the final and largest in a series of green roofs applied to bus shelters across the region. To realise this vision, Greenroofs Ltd – Sempergreen’s exclusive partner in New Zealand – collaborated with Legacy Construction to install a 180 m² green roof using the Sempergreen Click ‘n Go Sedumtray system. This lightweight modular tray system was selected for its ease of installation and instant green coverage.
Pilot for broader application
The decision to install a green roof was driven by several key goals: reducing the Urban Heat Island Effect, managing stormwater naturally, boosting biodiversity, improving aesthetics, and inspiring public engagement. Auckland Transport also viewed this project as a pilot for broader application across other public infrastructure.
“The installation of this extensive green roof was a success, thanks to the collaborative efforts of Greenroofs Ltd, Legacy Construction, and Auckland Transport. The project stands as a major achievement in urban greening for public infrastructure, providing ecological benefits and an improved visual landscape for commuters.”
Tailored for long-term performance
What sets this project apart is the early focus on long-term performance, with maintenance and accessibility thoughtfully integrated into the design. A fall arrest system was included to ensure safe future access, and a fully automated, Wi-Fi enabled irrigation system was installed to provide reliable water management throughout the year. Greenroofs Ltd has also been awarded the long-term maintenance contract and will visit the site quarterly to ensure optimal performance.
Green benefits in every sense
The Click ‘n Go trays are pre-grown at Sempergreen’s nursery, ensuring 95% plant coverage upon installation. Besides their visual appeal, the green roof helps capture rainwater, buffers temperature, reduces noise pollution and extends the lifespan of the roof by shielding it from UV exposure and extreme weather.
In a bustling urban setting like Puhinui Station, this green roof is more than just decoration – it’s a living contribution to a healthier, more resilient city.
Project details
Location:
Client: Auckland Transport
Green roof supplier: Greenroofs Ltd / Sempergreen New Zealand
Installation: Legacy Construction / Greenroofs Ltd
Surface area: Approx. 180 m²
System used: Sempergreen Click ‘n Go Sedumtrays
Installation date: June 2025
