Eco-honours to new house

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A Queenstown building company claims environmental honours on one of its new homes. 

Rilean Construction says a Speargrass Flat Road home completed in April has been awarded the Wakatipu’s first six-star rating in the national Homestar system. 

Homestar is a joint venture between building industry body BRANZ and the New Zealand Green Building Council. 

With a maximum of 10 stars, Homestar ranks houses for comfort, warmth, health, energy use and water consumption. 

The four-bedroom 290-square-metre home, built for Graham and Cristina Robinson, was recently assessed by a Homestar assessor. 

“All areas of the home were checked for efficiencies in water, waste, construction materials, energy health and comfort,” Rilean part-owner Mick Moffatt says. 

“Most homes in NZ would sit at around two to four stars at best so six stars is a significant achievement,” he says.
Moffatt says a special vapour-check membrane built into the Robinson house reduces air leakage and consequent heat loss. 

A high level of insulation is down to cellulose wall insulation and high-rating ceiling batts, with a polystyrene concrete slab flooring system maximising solar heat. 

Efficient running costs stem from a ventilation system with a passive heat exchanger to warm incoming air, as well as a solar hot water system, Rilean’s Moffatt says. 

The house is among seven that Rilean is building or has built under its Evolution brand, launched last year. 

“Kiwis are becoming more aware of the importance of living in homes that are safe, warm and dry as well as efficient in water and energy,” Moffatt says.