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Consultation document: Insulation requirements in housing and other buildings
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3. Insulation in large buildings
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3.17. Transition period for large buildings H1/AS2 & H1/VM2
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Consultation document: Insulation requirements in housing and other buildings
- 1. Introduction
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2. Insulation in housing and small buildings
- 2.1. Background on energy efficiency for housing and small buildings
- 2.2. Optimising insulation to better balance upfront building costs and longer-term benefits
- 2.3. Topic 1: The schedule method may lead to higher upfront costs and less cost-effective construction than the more flexible calculation and modelling methods
- 2.4. Topic 2: The calculation method contains restrictions to the flexibility of roof, wall and floor R-values that can lead to unnecessarily costly and complex construction in some buildings
- 2.5. Topic 3: Where underfloor heating is only used in bathrooms, the minimum R-values for heated floors may cause unreasonable upfront costs
- 2.6. Consistency and certainty of compliance and consenting
- 2.7. Topic 4: The modelling method includes requirements that are unclear or outdated
- 2.8. Topic 5: Thermal bridging from framing in walls is not adequately considered
- 2.9. Topic 6: How the areas of roofs, walls and floors should be measured is unclear
- 2.10. Topic 7: NZS 4214 includes ambiguous instructions for determining the R-values of roofs, walls and some floors
- 2.11. Topic 8: For some mixed-use buildings it is unclear whether H1/AS1 and H1/VM1 can be used, or H1/AS2 and H1/VM2
- 2.12. Topic 9: The look-up tables with R-values for slab-on-ground floors do not cater for some common situations
- 2.13. Topic 10: The look-up table with R-values for vertical windows and doors in housing misses some common glazing types
- 2.14. Topic 11: Acceptable Solution H1/AS1 and Verification Method H1/VM1 include obsolete provisions and definitions, and outdated references to documents and tools
- 2.15. Summary of the proposals for housing and small buildings
- 2.16. Transition period for housing and small buildings
- 2.17. Effects of the H1 insulation requirements on overheating and dampness risks in new housing
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3. Insulation in large buildings
- 3.1. Background on energy efficiency for large buildings
- 3.2. Optimising insulation to better balance upfront building costs and longer-term benefits
- 3.3. Topic 12: The schedule method may lead to less cost-effective construction than the more flexible calculation and modelling methods
- 3.4. Topic 13: The calculation method does not provide flexibility for roof, skylight and floor R-values, limiting opportunities for optimising insulation
- 3.5. Topic 14: Where underfloor heating is only used in bathrooms, the minimum R-values for heated floors may cause unreasonable upfront costs
- 3.6. Consistency and certainty of compliance and consenting
- 3.7. Topic 15: The modelling method includes requirements that are unclear or outdated
- 3.8. Topic 16: The schedule method does not adequately limit heat losses and gains from skylights in large buildings
- 3.9. Topic 17: Thermal bridging from framing in walls is not adequately considered
- 3.10. Topic 18: How the areas of roofs, walls and floors should be measured is unclear
- 3.11. Topic 19: NZS 4214 includes ambiguous instructions for determining the R-values of roofs, walls and some floors
- 3.12. Topic 20: For some mixed-use buildings it is unclear whether H1/AS1 and H1/VM1 can be used, or H1/AS2 and H1/VM2
- 3.13. Topic 21: The look-up tables with R-values for slab-on-ground floors do not cater for some common situations
- 3.14. Topic 22: Acceptable Solution H1/AS2 and Verification Method H1/VM2 include obsolete provisions and definitions, and outdated references to documents and tools
- 3.15. Summary of the proposals for large buildings
- 3.16. Transition period for large buildings H1/AS2 and H1/VM2
- 3.17. Transition period for large buildings H1/AS2 & H1/VM2
- Appendix A: Proposed changes to Acceptable Solution H1/AS1 Energy Efficiency for all housing, and bu
- Appendix B: Proposed changes to Verification Method H1/VM1 Energy Efficiency for all housing, and buildings up to 300m squared
- Appendix C: Proposed changes to Acceptable Solution H1/AS2 Energy Efficiency for buildings greater than 300m squared
- Appendix D: Proposed changes to Verification Method H1/VM2 Energy Efficiency for buildings greater than 300m squared
3.17. Transition period for large buildings H1/AS2 & H1/VM2
Question on the transition time of 12 months for the proposed H1/AS2 and H1/VM2 changes to take effect.
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SQ15. Do you agree with the proposed transition time of 12 months for the proposed changes to take effect?
- Yes, it is about right.
- No, it should be longer (24 months or more).
- No, it should be shorter (less than 12 months).
- Not sure/no preference.