BRANZ House Insulation Guide 6th edition v2.6 PC (1 August 2025)
This Microsoft Excel (.xlxs) 25MB download of BRANZ House Insulation Guide 6th edition is for PC users.
Updates:
- A new 'Summary' sheet has been added to the tool
- An error has been repaired where the R-value for plain slab floors was higher than it should have been when adding floor topper insulation
- Improvements to the 'Correction for reduced perimeter insulation' section of the 'Roof spaces' sheet
The guide is now in two parts:
- The tables of construction R-values for common construction options for compliance under H1/AS1 and H1/VM1 5th edition
- The accompanying House Insulation Guide text [PDF] for guidance on insulation to meet or exceed H1 AS/1 and H1/VM1 5th edition.
Webinar: HECC
The Homestar Embodied Carbon Calculator (HECC) is a free tool that assesses the cradle-to-cradle life cycle embodied carbon of homes with traditional constructions (e.g. timber/steel framed homes).
BRANZ House Insulation Guide 6th edition v2.6 ONLINE (1 August 2025)
This Microsoft Excel (.xlxs) 25MB download of BRANZ House Insulation Guide 6th edition is for PC and MAC users of Microsoft 365 [ONLINE]
Updates:
- A new 'Summary' sheet has been added to the tool
- An error has been repaired where the R-value for plain slab floors was higher than it should have been when adding floor topper insulation
- Improvements to the 'Correction for reduced perimeter insulation' section of the 'Roof spaces' sheet
The guide is now in two parts:
- The tables of construction R-values for common construction options for compliance under H1/AS1 and H1/VM1 5th edition
- The accompanying House Insulation Guide text [PDF] for guidance on insulation to meet or exceed H1 AS/1 and H1/VM1 5th edition.
Once you have downloaded this version open it using Excel on Microsoft 365
Site results
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Seismic resilience
Seismic resilience is about constructing new buildings and strengthening those already built to keep occupants safe in an earthquake and to limit damage to the building itself.
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Interstitial moisture
<p>The interstitial moisture (condensation within the building structure) stream looked at moisture management in roof spaces - both residential and commercial.</p>
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Fire safety design
Fire safety design aims to reduce the impact of fires in Aotearoa New Zealand buildings.
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CO₂RE
<p data-block-key="88ets">Provides calculated carbon footprints per square metre for residential roof, wall and floor constructions.</p>
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ADESO® – Adesoguard, REOXTHENE TECHNOLOGY® Easy Lift, REOXTHENE TECHNOLOGY® Bitulight and REOXTHENE TECHNOLOGY® Polyflex Light Damp Proof (DPM) Membranes
<p data-block-key="bvhzc">ADESO® – Adesoguard, REOXTHENE TECHNOLOGY® Easy Lift, REOXTHENE TECHNOLOGY® Bitulight and REOXTHENE TECHNOLOGY® Polyflex Light Damp Proof (DPM) Membranes are self-adhesive and torch-applied bitumen-based damp-proof membranes for basement retaining walls and floors. They are applied under floor slabs and foundations and to the exterior face of basement retaining walls to prevent water vapour penetrating to the interior face in spaces where moisture may cause damage.</p><p data-block-key="fef48">The products are supplied as torch–applied modified bitumen sheets or self-adhering, cold-applied, polymer-rubber modified bitumen sheets in roll form and are applied as single or double layer systems.</p>
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Structural and seismic engineering research
The structural and seismic engineering team investigates critical aspects of building structural integrity and serviceability. We also conduct applied research of building structures under loading conditions such as wind, vibration and fires.
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Build Insights quarterly report
<p data-block-key="std7n">BRANZ shares the top sector trends and insights every quarter</p>
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BEES research questions, objectives and outcomes
<p>The BEES research was guided by the following research questions, objectives and outcomes.</p>
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Climate change and the built environment
<p data-block-key="u7adk">The construction industry has responsibilities around the mitigation of and adaptation to the impacts of climate change.</p>