NZS 4246:2006
Energy efficiency - Installing insulation in residential buildings
NZS 4246 has been amended to clarify the existing requirements and incorporate information on new products, in particular semi-rigid underfloor insulation. Wording has also been amended throughout the Standard, together with updated comments, notes, figures and tables for clarity and to align with other Standards and the New Zealand Building Code. Extra information, new definitions, and special considerations have also been included. The Standard no longer includes guidance on installing reflective pliable membranes.
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COMMITTEE REPRESENTATION
ACKNOWLEDGEMENT
COPYRIGHT
CONTENTS
REFERENCED DOCUMENTS
FOREWORD
REVIEW
1 INTRODUCTION
1.1 Objective
1.2 Scope
1.3 Compliance
1.4 Interpretation
1.5 Notes and commentary clauses
1.6 Referenced documents
1.7 Definitions
2 INSULATION PRODUCTS
2.1 Insulation products included
2.2 Insulation products excluded
3 SPECIAL CONSIDERATIONS
3.1 Storage and transport
3.2 Labelling
3.3 Insulation compression
3.4 Water damage
3.5 Recessed light fittings (downlights)
3.6 Recessed spaces (dropped ceilings)
3.7 Heating appliance flues
3.8 Electrical cables
3.9 Built-in appliances and enclosures containing electrial equipment
3.10 Plumbing
3.11 Wall underlay
3.12 Drained and ventilated cavities
3.13 Access hatches
3.14 Strapping
3.15 Roof space ventilation
3.16 Unducted fan units
3.17 Unducted passive vents
3.18 Insulation of cold and hot water pipes in ceiling spaces
4 LOOSE-FILL
4.1 Walls – unlined
4.2 Pitched roof, flat ceiling
5 SEGMENTS AND BLANKET PRODUCTS
5.1 Ceilings – unlined
5.2 Ceilings – lined
5.3 Walls – Unlined
5.4 Floors – new and existing
6 RIGID AND SEMI-RIGID SHEETS
6.1 Fixings
6.2 Pipes and plumbing
6.3 Electrical cables
6.4 Ceiling – unlined and lined
6.5 Walls – unlined
6.6 Underfloor – new and existing
7 HOT WATER CYLINDER WRAPS
8 ON-GROUND VAPOUR BARRIERS
9 PIPE INSULATION
9.1 Fitting the insulation
APPENDIX
A –CLIMATE ZONES
B –HEALTH AND SAFETY
C –EFFECT OF CLEARANCES ON ROOF R-VALUE
D –SUMMARY OF KEY CHANGES IN NZS 4246:2006 AMENDMENT NO. 1
TABLE
B1 – Installing underfloor insulation with power on
B2 – Installing underfloor insulation with power off
C1 – Clearance 200mm –Approximate reduction in R-value from R-3.0 by number of downlights per 10m²
C2 – Clearance 200mm –Approximate reduction in R-value from R-3.0 by distance between the centre ofdownlights
C3 – Clearance 50mm –Approximate reduction in R-value from R-3.0 by number of downlights per 10m²
C4 – Clearance 50mm –Approximate reduction in R-value from R-3.0 by distance between the centre ofdownlights
FIGURE
1 – Recessed light fitting
2 – Recessed ceiling space
3 – Retrofitting wall underlay
3(a) – Roof detail for a low slope
3(b) – Skillion roof with metal tile cladding
3(c) – Low pitch roof with metal tiles
3(d) – Profiled metal roof
3(e) – Metal tile roof
4 – Segments in unlined ceiling
5 – Blanket in ceiling secured with strapping
6 – Pitched roof – Segments installed in lined ceiling to top plate withcontinuous blanket overlaid by 150mm
7 – Truss roof – Segment installed to top plate with full thickness blanketabutted to end of segment between truss
8 – Blanket torn over the ceiling joist 300mm back from the top plate
9 – Example of ‘tucking in’ showing undesirable compression ofinsulation at edges
10 – Segments correctly installed in new wall
11 – Tearing blanket to fit
12 – Stapling blanket
13 – Completed blanket installation in framed walls
14 – Installing underfloor blanket
15 – Installation of underfloor rigid floor insulation
16 – Fitting semi-rigid sheets
17 – Insulated hot water cylinder
18 – Installing an on-ground vapour barrier
19 – On-ground vapour barrier
A1 – New Zealand climate zones
B1 – When not to install underfloor foil insulation
Amendments
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References
Materials for the thermal insulation of buildings - General criteria and technical provisions
Energy efficiency - Large buildings - Building thermal envelope
Energy efficiency - Domestic type hot water systems
Related Information
Building Code Compliance Document SH
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: AS1
Citation context:Residential Tenancies (Smoke Alarms and Insulation) Regulations 2016
Ministry: Ministry of Business Innovation and Employment - Digital, Communications and Transformation (RSM)
Section: 12(1)(b)
Citation context:Refers to 4246:2006(NZS)A1. 12 Qualifying ceiling insulation: general rule (1) For the purposes of regulation 11(3), the ceiling insulation is qualifying ceiling insulation if, (a) when the insulation was originally installed, the insulation, as a product, had the following R-value (at least): (i) 2.9, if the premises are located in zone 1 or zone 2: (ii) 3.3, if the premises are located in zone 3; and (b) upon the completion of the original installation of the insulation, if that occurred on or after 1 July 2016, the original installation accorded with NZS 4246:2006 (so far as that standard was relevant to the original installation); and...
Residential Tenancies (Smoke Alarms and Insulation) Regulations 2016
Ministry: Ministry of Business Innovation and Employment - Digital, Communications and Transformation (RSM)
Section: 15(1)(b)
Citation context:Refers to 4246:2006(NZS)A1. 15 Qualifying underfloor insulation: general rule (1) For the purposes of regulation 14(3), the underfloor insulation is qualifying underfloor insulation if, (a) when the insulation was originally installed, the insulation, as a product, had the R-value of 1.3 (at least); and (b) upon the completion of the original installation of the insulation, if that occurred on or after 1 July 2016, the original installation accorded with NZS 4246:2006 (so far as that standard was relevant to the original installation); and...
Residential Tenancies (Smoke Alarms and Insulation) Regulations 2016
Ministry: Ministry of Business Innovation and Employment - Digital, Communications and Transformation (RSM)
Section: 22(2)
Citation context:Refers to 4246:2006(NZS)A1. 22 Insulation work during tenancy to be carried out in accordance with NZS 4246:2006... ...(2) Any work in respect of insulation that is carried out during the tenancy in connection with any ceilings or suspended floors that are at the premises must be carried out in accordance with NZS 4246:2006 (so far as that standard is relevant to the work).
Residential Tenancies (Smoke Alarms and Insulation) Regulations 2016
Ministry: Ministry of Business Innovation and Employment - Digital, Communications and Transformation (RSM)
Section: 3 Interpretation
Citation context:Refers to 4246:2006(NZS)A1. NZS 4246:2006 means New Zealand Standard NZS 4246:2006 (Energy Efficiency – Installing Insulation in Residential Buildings)
Similar Standards
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AS/NZS 4200.1:2017
Pliable building membranes and underlays - Part 1: Materials -
AS/NZS 4200.2:1994
Pliable building membranes and underlays - Installation requirements
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AS/NZS 4201.0:1994
Pliable building membranes and underlays - Methods of test - General introduction and list of methods
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AS/NZS 4201.1:1994
Pliable building membranes and underlays - Methods of test - Resistance to dry delamination
COMMITTEE REPRESENTATION
ACKNOWLEDGEMENT
COPYRIGHT
CONTENTS
REFERENCED DOCUMENTS
FOREWORD
REVIEW
1 INTRODUCTION
1.1 Objective
1.2 Scope
1.3 Compliance
1.4 Interpretation
1.5 Notes and commentary clauses
1.6 Referenced documents
1.7 Definitions
2 INSULATION PRODUCTS
2.1 Insulation products included
2.2 Insulation products excluded
3 SPECIAL CONSIDERATIONS
3.1 Storage and transport
3.2 Labelling
3.3 Insulation compression
3.4 Water damage
3.5 Recessed light fittings (downlights)
3.6 Recessed spaces (dropped ceilings)
3.7 Heating appliance flues
3.8 Electrical cables
3.9 Built-in appliances and enclosures containing electrial equipment
3.10 Plumbing
3.11 Wall underlay
3.12 Drained and ventilated cavities
3.13 Access hatches
3.14 Strapping
3.15 Roof space ventilation
3.16 Unducted fan units
3.17 Unducted passive vents
3.18 Insulation of cold and hot water pipes in ceiling spaces
4 LOOSE-FILL
4.1 Walls – unlined
4.2 Pitched roof, flat ceiling
5 SEGMENTS AND BLANKET PRODUCTS
5.1 Ceilings – unlined
5.2 Ceilings – lined
5.3 Walls – Unlined
5.4 Floors – new and existing
6 RIGID AND SEMI-RIGID SHEETS
6.1 Fixings
6.2 Pipes and plumbing
6.3 Electrical cables
6.4 Ceiling – unlined and lined
6.5 Walls – unlined
6.6 Underfloor – new and existing
7 HOT WATER CYLINDER WRAPS
8 ON-GROUND VAPOUR BARRIERS
9 PIPE INSULATION
9.1 Fitting the insulation
APPENDIX
A –CLIMATE ZONES
B –HEALTH AND SAFETY
C –EFFECT OF CLEARANCES ON ROOF R-VALUE
D –SUMMARY OF KEY CHANGES IN NZS 4246:2006 AMENDMENT NO. 1
TABLE
B1 – Installing underfloor insulation with power on
B2 – Installing underfloor insulation with power off
C1 – Clearance 200mm –Approximate reduction in R-value from R-3.0 by number of downlights per 10m²
C2 – Clearance 200mm –Approximate reduction in R-value from R-3.0 by distance between the centre ofdownlights
C3 – Clearance 50mm –Approximate reduction in R-value from R-3.0 by number of downlights per 10m²
C4 – Clearance 50mm –Approximate reduction in R-value from R-3.0 by distance between the centre ofdownlights
FIGURE
1 – Recessed light fitting
2 – Recessed ceiling space
3 – Retrofitting wall underlay
3(a) – Roof detail for a low slope
3(b) – Skillion roof with metal tile cladding
3(c) – Low pitch roof with metal tiles
3(d) – Profiled metal roof
3(e) – Metal tile roof
4 – Segments in unlined ceiling
5 – Blanket in ceiling secured with strapping
6 – Pitched roof – Segments installed in lined ceiling to top plate withcontinuous blanket overlaid by 150mm
7 – Truss roof – Segment installed to top plate with full thickness blanketabutted to end of segment between truss
8 – Blanket torn over the ceiling joist 300mm back from the top plate
9 – Example of ‘tucking in’ showing undesirable compression ofinsulation at edges
10 – Segments correctly installed in new wall
11 – Tearing blanket to fit
12 – Stapling blanket
13 – Completed blanket installation in framed walls
14 – Installing underfloor blanket
15 – Installation of underfloor rigid floor insulation
16 – Fitting semi-rigid sheets
17 – Insulated hot water cylinder
18 – Installing an on-ground vapour barrier
19 – On-ground vapour barrier
A1 – New Zealand climate zones
B1 – When not to install underfloor foil insulation
Amendments
NZS 4246:2006
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.