Crown calls for more green roofs in Auckland
Auckland has the best climate in the world for green roofing, but high costs and few incentives means it hasn’t taken off, a Crown research institute says.
Landcare Research ecologist Robyn Simcock said Auckland was falling behind the international trend of building green roofs and walls to combat the negative effects of urban development.
Until last month no work or research had been done in the area since late 2013, he said.
‘‘We have the information, we know how to do them, we’re just not doing them. We’ve gotten way behind the eight ball,’’ Simcock said.
‘‘It’s crazy in New Zealand we’ve got the best climate in the world for green roofs.’’
A green roof is a roof of a building that is covered with vegetation planted over a waterproofing membrane.
Green roofs extend the life of the building’s roof by protecting it from sunlight. They also reduce reflection, insulate the building keeping it cooler in the summer and warmer in the winter, soak up stormwater, and filter dust and air pollution.
‘‘The green is the last thing to go on a building, and it’s the first they take off to save costs,’’ Simcock said.
In September Simcock and her team were granted funding to identify barriers to ‘‘greening’’ cities, and select some of the more urgent and ‘‘doable’’ areas and buildings to address in the next 12 months.
New Zealand Green Building Council chief executive Andrew Eagles said it was a shame Auckland had missed a significant opportunity.
‘‘Through poor planning, and not incentivising sensible development we’re allowing water to stream off our roofs, to stream off our paving into a drainage system
‘‘It's crazy in New Zealand we've got the best climate in the world for green roofs.’’
that doesn’t work,’’ Eagles said.
‘‘And that’s pouring sewage into our harbour and our beaches.’’
In the UK, Montreal, Paris and Washington councils were thinking about how to deal with rain fall, by getting it into the ground, or using green roofs and permeable paving, he said. ‘‘We’re a bit lazy,’’ he said. Auckland Council chief sustainability officer John Mauro said it was not looking into green roof incentives at the moment.