New Apartments Showcase Low Carbon Building Benefits

Published: Wed 12 Oct 2022 08:42 AM
Building with renewable engineered wood rather than concrete offers a significant win for the environment and the financials, a new case study has revealed.
The study used Clearwater Quays luxury apartments in Christchurch as a test case. Clearwater Quays was constructed as a part of Mid-Rise Wood Construction, a public-private programme, a public-private partnership between the Ministry for Primary Industries and Red Stag Investments. The programme objective is encouraging greater use of New Zealand-engineered timber in multi-story, prefabricated buildings.
“Calculations show that using wood in place of concrete to build this five-storey demonstration building is removing over a million kilograms of carbon dioxide from the environment,” says Barry Lynch, director of Logic Group, and Eoin McLoughlin, senior quantity surveyor for the Clearwater project.
Mr Lynch says carbon calculations for the Clearwater building show its timber construction saved 87,400kg of carbon dioxide (CO2), compared with a CO2 release of 952,600kg if it had been built of concrete, and 794,600kg if built of steel and concrete. The $3.37m price to design, develop and construct the apartment block would have been $3.89m for concrete construction or $3.59m for steel and concrete. The calculations include financial impacts of a reduced construction time.
The Clearwater case study is now freely available for construction professionals. The project has been deliberately designed to be open source, with all project information being made available to showcase the advantages of the new building materials and methods.
The Clearwater demonstration building is funded jointly by the Ministry for Primary Industries (MPI) and Red Stag Investments Ltd. Funding for the programme is part of the ‘Mid-Rise Wood Construction’ partnership between Red Stag and MPI. The programme aims to accelerate and increase the use of mass timber and prefabrication in a range of public and commercial building types.
‘Mid-Rise Wood Construction’ complements the government’s initiatives to encourage high value domestic processing and manufacturing from New Zealand’s plantation forests and deliver a zero-carbon construction sector by designing to increase low carbon materials used in construction. Programme projections suggest if engineered timber is widely adopted, this construction method could save the country $330m annually by 2036. Full details of the case study are available here.

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