House Insulation Guide version history

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

Downloads:

BRANZ House Insulation Guide 6th edition v2.6 PC (1 August 2025)

BRANZ House Insulation Guide 6th edition v2.6 MAC (1 August 2025)

BRANZ House Insulation Guide 6th edition v2.6 ONLINE (1 August 2025)

Updates:

Additional sheets have been added to support:

• Adjusting thermal conductivity and R-values with temperature. This is important for imported products which by default are rated at default temperature of 10°C. The default temperature for NZ is 15°C and 23°C for Australia
• Calculated R-values for a group of insulation products made from the same material with the same conductivity

Downloads:

BRANZ House Insulation Guide 6th edition v2.5 PC (4 July 2025)

BRANZ House Insulation Guide 6th edition v2.5 MAC (4 July 2025)

BRANZ House Insulation Guide 6th edition v2.5 ONLINE (4 July 2025)

Updates:

• Minimal errors have been repaired.

Downloads:

BRANZ House Insulation Guide 6th edition v2.4 PC (17 April 2025)

BRANZ House Insulation Guide 6th edition v2.4 MAC (17 April 2025)

BRANZ House Insulation Guide 6th edition v2.4 ONLINE (17 April 2025)

Updates:

• Removal of the ‘insulated plasterboard’ option in the lining materials.
  Insulated plasterboard can be entered as separate insulation and plasterboard layers. 

Downloads:

BRANZ House Insulation Guide 6th edition v2.3 PC (14 April 2025)

BRANZ House Insulation Guide 6th edition v2.3 MAC (14 April 2025)

BRANZ House Insulation Guide 6th edition v2.3 ONLINE (14 April 2025)

Updates:

• This version now opens with all fields deselected. Data will appear once your selections are made (PC and MAC versions only).
• The data for the slab floors has been extended down to very small slabs (Area/Perimeter 0.6)
• Minimal errors/inconsistency in the results have been repaired. For example, the difference between offset and inline secondary framing in the wall sheet. Another example is the difference between 10 mm and 13 mm lining in the roof space sheet.

Downloads:

BRANZ House Insulation Guide 6th edition V2.2 PC (April 2025)

BRANZ House Insulation Guide 6th edition V2.2 MAC (April 2025)

BRANZ House Insulation Guide 6th edition V2.2 ONLINE (April 2025)

New Features:

• A helpful “Door” sheet for determining the R-value of doors (leaf and frame) based on the R-value and size of the door leaf and the material of the frame. This does not include sliding doors.
• A frame fraction estimator to the “Wall” sheet. This addition is experimental and still under development. Addtional option to note the source of the frame fraction value. That source may be for instance the frame & truss supplier, or it may have been estimated from the plans.
• Data entry summary at the top of each of the sheets. The completed sheet can be reproduced using this character string [see image].

Other version updates:

• Repaired an error with the “Roofs” sheet where the R-value included the effects of an R1.2 secondary insulation layer, even when that option wasn’t selected. It only applied to the case where the joist height was 290mm.
• Improved appearance of the “Roof edge” sheet.

Downloads:

231101_2.1_House_Insulation_Guide_6th_Edition_MAC_Form
231101_2.1_House_Insulation_Guide_6th_Edition_Office365_PC_MAC
231101_2.1_House_Insulation_Guide_6th_Edition_PC_ActiveX

Updates:

• Extra options for secondary insulation layers.
• Polyester and wool material options have been added to roof edge insulation compression.
• More options for the wall makeup.
• Two insulation layer option for the roof space insulation.

Downloads:

230815_2.0_House_Insulation_Guide_6th_Edition_MAC_Form
230815_2.0_House_Insulation_Guide_6th_Edition_Office365_PC_MAC
230815_2.0_House_Insulation_Guide_6th_Edition_PC_ActiveX

Updates:

• User improvement to update the edge of roof insulation calculator.
• All formats updated.

Downloads:

230525_House_Insulation_Guide_6th_Edition_Office365_PC_MAC
230525_House_Insulation_Guide_6th_Edition_PC_ActiveX
230525_House_Insulation_Guide_6th_MAC_Form

Updates:

• User feedback amendments.
• All formats updated.

Downloads:

230510_House_Insulation_Guide_6th_Edition_MAC_Form
230510_House_Insulation_Guide_6th_Edition_Office365_PC_MAC
230510_House_Insulation_Guide_6th_Edition_PC_ActiveX

Updates:

• User feedback amendments.
• All formats updated.

Downloads:

230427_House_Insulation_Guide_6th_Edition_MAC_Form
230427_House_Insulation_Guide_6th_Edition_Office365_PC_MAC
230427_House_Insulation_Guide_6th_Edition_PC_ActiveX

Updates:

• PC format updated.
• New Mac and online formats added.

Downloads:

House_Insulation_Guide_6th_Edition_MAC_Form_Apr_2023
House_Insulation_Guide_6th_Edition_Office365_PC_MAC_Apr_2023
House_Insulation_Guide_6th_Edition_PC_ActiveX_Apr_2023

Updates:

• New release.
• Part 2 of the guide - BRANZ House Insulation Guide text [PDF].

Downloads:

BRANZ_HIG_6th Edition [text]

Updates:

• PC format updated.

Downloads:

House_Insulation_Guide_6th_Edition_PC_Oct_2022

Updates:

• New House Insulation Guide 6th edition soft copy [XLSX] launched

Downloads:

House_Insulation_Guide_6th_Edition_PC_Oct_2022