From Building networks
We are a young country - and some of our historic classified buildings wouldn't even get on the radar in other countries. In NZ we have a building code which has been around since 1992. At that time one code clause called B2 durability was first published.
Breaking it down simply
There are three nominated time periods
Building elements should last at least 5, 15, and 50 years
These timeframes kick in when the code compliance certificate is issued at the end of a consent. Not when the building is practically complete
Owners may be able to obtain a B2 modification (a process I will explain in another blog) but the longer they wait the more unlikely it gets.
Download B2 durability document here