NZ Building Code guide

❄️ Energy & H1 — the plain-English guide

H1/AS1 6th edition, R-value targets, climate zones, glazing requirements. Free, plain-English NZ Building Code reference for builders — 5 topics.

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H1/AS1 6th EditionNZBC clause H1 Energy Efficiency is about keeping the heat you pay for inside the building. The Acceptable Solution…

Climate Zones (6)NZBC H1/AS1 6th edition — in force NOW (published 27 Nov 2025). 5th ed Amendment 1 still valid for consents until 26…

R-value TargetsThese are the construction R-values each part of the thermal envelope must reach — the resistance of the whole…

Glazing R-valuesA window's thermal performance comes from the whole unit — the glass and the frame together — not just "double…

Construction R-valuesThe single biggest H1 mistake is confusing the number on the insulation bag with the number the Code asks for. The…

More of the NZ Building Code guide: Standards & Codes · Contracts & Compliance · Quality & Defects · Build Sequence · Materials · Structural · Linings & GIB · Weathertightness · Fire & Acoustic · Site Conditions · Trades · Healthy Homes · Health & Safety · BRANZ Research · Pro Tips & Facts

Plain-English guide, not advice. This page helps you understand and navigate the rules — it is general information, not design, engineering or consent advice, and it does not reproduce the copyrighted tables of NZS 3604 or any Standard. Always check the current Standard or Acceptable Solution and your BCA, and use a suitably qualified LBP, engineer or QS where it matters.

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