The document provides an overview of changes to New Zealand's building code clause H1 regarding increased energy efficiency requirements. Key points include: - Increased insulation requirements for walls, roofs, floors, and windows based on three climate zones. - Three methods to determine compliance: schedule, calculation, or modeling depending on building design complexity. - Uninsulated buildings lose the most heat through the roof, walls, windows, and floor. Insulation levels are increased the most for the roof. - Examples are given of insulation levels needed to meet requirements for different building materials like concrete tiles, brick veneer, or stucco cladding. - The calculation method determines insulation requirements based on

1. NZBC Clause H1 Overview Robert Campion Architectural Profiles Ltd (APL) October 2007

3. nzbc clause H1

7. climate zones Zone1 Auckland, North Zone 2 Balance North Island, except Central Plateau Zone 3 South Island & Central Plateau

8. new R values

11. schedule method

13. floor insulated timber floor draped foil 100mm sag carpet = R1.5 no carpet = R1.1 Pic Courtesy of BRANZ - BRANZ House Insulation Guide

14. floor concrete floor slab/perim. ratio = 1.5 insulated / no TB = R1.3 insulated with TB = R1.5 Pic Courtesy of BRANZ - Build Magazine

16. roof concrete tile - truss blanket type timber battens z2 requirement = R2.9 insulation must meet R2.65 Pic Courtesy of BRANZ - BRANZ House Insulation Guide

18. walls brick veneer blanket type 100 x 50 studs @ 600 z2 requirement = R1.9 insulation must meet R2.05 Pic Courtesy of BRANZ - BRANZ House Insulation Guide

19. walls stucco on cavity blanket type 100 x 50 studs @ 600 z2 requirement = R1.9 insulation must meet R2.15 Pic Courtesy of BRANZ - BRANZ House Insulation Guide

20. walls stucco on cavity blanket type 100 x 50 studs @ 400 z2 requirement = R1.9 insulation must meet R2.3 Pic Courtesy of BRANZ - BRANZ House Insulation Guide

22. schedule method

23. wers table

24. calculation method

30. modeling method

31. status Zone 3 31 October 2007 Zone 2 30 June 2008 Zone 1 30 Sept 2008

32. thank you Refer to the Third Edition of NZBC Clause H1 – Energy Efficiency in conjunction with NZS 4218:2004 – Energy Efficiency, Small Building Envelope, for a full understanding of the changes.