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InteriorInterior

Surface Water Sumps: Their Location, Sizing and Function

In designing a surface water drainage solution, you must consider the performance of the design in service. This design must allow for stormwater to be disposed of without causing damage, nuisance, flooding, erosion, or water entry into buildings.

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21 September 2026
23 February 2026

Survive to 25 Became Survive 25. So, What Will 2026 Look Like?

EBOSS 21 Graphic

As we deal with a wide range of builders across NZ, I’m often asked “What are you seeing?”. The general feel that I’m getting is that the industry is more positive but that businesses aren’t yet seeing it in their books. But it was much the same at the end 2024 and into 2025. Will 2026 be any different?

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23 February 2026

As We Face Summer Overheating Issues, Why is Black in Fashion for Facades?

colour wheel

During the summer holiday, while I was driving about the North Island, I was aware of the continuing popularity of Black as the colour for exterior walls and roofs of recently built dwellings and terrace housing.

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24 November 2025

Are Your H1 Designs Blowing Money?

money counting

The challenge with H1 is that the underlying concept of thermal performance is quite complex. Surprisingly small things can tip a design over from passing to failing. Or costing a lot more.

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24 November 2025

Common Level Threshold Detailing: Reducing RFIs

EBOSS   Downpipe + Grates (1)

Meeting the requirements of E2 ch 7.4 will ensure that your design offers a compliant level threshold solution, negating the need for any specific design. Avoiding alternative solution designs will assist in a smoother consenting process and reduce RFI responses.

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24 November 2025

Revision of NZBC – H1 (Energy Efficiency)

architecture plans

Following instruction from the Minister for Building and Construction (the Hon. Chris Penk) asking MBIE to review the NZBC-H1 energy efficiency standard, a range of comments were received early this year (2025). I understand that recommendations for changes are nearing completion. In the meantime the current requirements are still in place, and then there will be a Transition Period to allow the current compliance methods to remain valid before the changes take full effect.

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24 November 2025

A Wrap-Up of Legislative and Regulatory Changes to the Building Industry in 2025

beehive wellington legislative changes to building industry

There's been a lot to keep up with in 2025 — from consent exemptions for granny flats and the removal of the schedule method, to recognition of overseas certification and mandating that 80% of building inspections be complete within 3 days. We've brought together the key changes in a single blog post so you can make sure you're up to date as we head into 2026. 

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24 November 2025

Passive Fire Design for Higher-Density and Multi-Storey Projects

Eboss Photo

It's not enough to erect fire-resistant walls and floors; we need an integrated system that accommodates all building services, plumbing, electrical cables, HVAC and drainage while preventing vertical fire spread, maintaining integrity under seismic or thermal movement, and preserving life-safety performance.

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14 November 2025

The New Zealand Building Code: Clause B1 Structure

structure image

For LBPs, Clause B1 defines much of their professional responsibility, especially when undertaking Restricted Building Work. By understanding and applying Clause B1 correctly, LBPs help protect the integrity of New Zealand’s homes and the safety of the people who live in them.

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14 November 2025

The Inspector Is Not Your Safety Net: LBPs Must Own Their Work

hard hat on building site

A recurring theme in complaints to the Building Practitioners Board is Licensed Building Practitioners (LBPs) using Building Consent Authorities (BCA) as quality control. This is a misunderstanding of the regulatory framework and could lead to disciplinary action. The Building Act is quite clear on the responsibilities of the various parties involved in the building construction process.

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27 October 2025

Protect the Structure: In-Situ Post-Tensioned Flat Slabs with Passive Fire Penetrations

CIFW100   Flat Slab Render

Post-tensioned concrete slabs, with their associated steel tendons, are a common construction technique in New Zealand for elevated slabs, residential buildings, and warehouses. These flooring systems, along with the building's other structural elements and services, can penetrate the slabs and fire cells, so each penetration needs to be treated to stop the spread of fire.

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