The Comprehensive Benefits of Retrofitting New Zealand Homes
Performance
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New Zealand’s performance-based Building Code was loosely derived from the Norwegian model and was New Zealand’s first nationwide Building Code. Before this, both central government and municipal authorities enforced building control legislation. While safety and structural issues were considered in the late nineteenth century, it took almost 100 years for a national building act to be established in 1991, with the New Zealand Building Code following in 1992. The performance code was selected over the common ‘prescriptive code’ to allow innovation and technology to be incorporated into New Zealand’s construction industry and to have a stronger focus on the durability of homes. However, B2 (durability) only covers 50 years, so homes built in the Pre, Inter, and Post War Eras are starting to degrade, requiring homeowners to retrofit, renovate, or simply live in dangerous, wet, cold, and toxic environments. With climate change redefining what ‘performance’ should mean in a building, retrofitting can offer significant benefits across various dimensions, including financial savings, improved health outcomes, and energy efficiency.