Six Green Stars

The redeveloped Mason Bros. building achieved the 6 Green Star rating in 2019. Here are its sustainability credentials.

● Existing building materials of steel and masonry re-used

● Removal and safe disposal of asbestos cladding, and safe immobilisation of site contamination

● 90 per cent reduction in PVC

● 90 of timber used has FSC certification, the gold standard for wood harvested from forests responsibly managed and environmentally conscious

● 80 per cent of concrete used on site certified as having lower environmental impact than standard concrete

● 90 per cent of floor coverings certified for lower environmental impact

● Low environmental impact ceiling tiles and plasterboard

● High performance solar control glazing that promotes enhanced daylight

● Light coloured surface finishes to promote deeper internal daylight distribution

● 100 per cent LED lighting with zoned switching and detectors

● Metering of energy and water usage, and 70 per cent reduction in water use, relative to Watercare assumptions for new developments

● 913 tonnes of demolition waste collected and 90 per cent recycled

● 136 tonnes of construction waste and 80 per cent recycled

● Windows are double glazed, the roof insulation is twice the Building Code minimum, and the underfloor water heating helps warm the building — atrium has natural ventilation

● 35 per cent reduction in energy use according to the NabersNZ assessment

● Rainwater harvesting into a central 25,000 litre tank, and water re-used in toilet flushing and hose tap for maintenance and cleaning. Rainwater contributes to 50 per cent of the total water used in the building annually

● 3200 tonnes of carbon reduction under lifecycle analysis