Typically, New Zealand construction treats projects as entirely unique, which just slows decisions, drives up costs, and invites delay. If you want to know how to practically solve this, I highly recommend attending Johann Betz’s upcoming ADNZ presentation on November 11th. He’ll be running through OSM3604®, a new guideline and code of practice for off-site manufactured light timber framing.
The core message is simple: we can’t build faster until we build smarter. Standardising our approach to timber panelisation solves these productivity issues without compromising your architectural design intent. I’ve seen this in Germany when I visited back in 2014. In the photo below you can see a sample timber panel installed onto the Aktiv-Stadthaus in Frankfurt, Germany.
Photo by Dr. Kara Rosemier of Jason Quinn in front of Aktiv-Stadthaus, Frankfurt in 2014.
It’s a bit daunting to shift how you document, but OSM3604 provides standard details so you don’t have to reinvent the wheel. It is suited for low-energy and Passive House builds that require high-performance, multi-layered envelopes with airtightness and MVHR integration. By standardising junctions (and as has become typical in NZ PH projects), ditching nogs and dwangs for continuous insulation and utilising proper service cavities, everything becomes simpler. The architect’s job shifts to designing intelligently within the construction system, which is how we can deliver better, healthier housing.
Key takeaways to look out for:
- OSM3604 is a complementary guide to NZS 3604:2011, standardising assemblies so any registered fabricator can build to the same logic.
- Standardisation removes unnecessary variation in junctions while allowing the building’s form, character, to be you.
- The system thrives on compact geometry and simple roof forms.
- It includes practical “sweet spot” panel dimensions, such as 2.7m by 6.0m for horizontal wall panels.