Prosperbuild.com

Lead. Reasonably good timber preservative, but fairly problematic to the renovator. Or the person that buys a renovated house where due care hasn't been taken.
You don't need us to tell you if lead is present or not, DIY Test kits are readily available - but the first point is to know it exists. Painted timber on a house that predates the late 80s? Odds are good there is some lead. test.

Tainted by toxic lead: A family's dream home turns into a nightmare Two years ago Ananda and Graeme Card were oblivious to an invisible threat dusted around their home.

This has been an amazing journey for those involved - it got me interested in high performance building, thermal performance, building and health implications, and to be fair, the idea of immediate community is brilliant. And so nice and warm!

Making a modern village On a former school site in central Dunedin, one of New Zealand’s most ambitious housing experiments has finally come to fruition.

Normal people are sneaking off to bed, or have been snoring for hours.

Me however - I find humour in the inane - for example:
https://www.legislation.govt.nz/regulation/public/2019/0088/latest/whole.html contrast definitions from schedule 2 with
https://www.standards.govt.nz/shop/nzs-42182009/ - particular attention to 1.2.2.

NZ likes to build the contradictions directly into the law - for maximum WTF.
Its a minefield - we aim to help you navigate it.

NZS 4218:2009 :: Standards New Zealand Specifies the thermal insulation requirements for housing and small buildings. It provides three methods for demonstrating compliance with the New Zealand Building Code: Schedule, Calculation and Modelling methods. It guides the achievement of minimum thermal resistance through balancing solar gains...