NCC 2022 Volume Two - Building Code of Australia Class 1 and 10 buildings
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List of amendments - NCC 2022 Volume Two

List of amendments - NCC 2022 Volume Two

This list has been prepared by the Australian Building Codes Board to assist National Construction Code (NCC) users in identifying changes incorporated in the 2022 edition of the Volume Two of the NCC.

The notes provide a description of major changes made from the previous edition of Volume Two.

While the Australian Building Codes Board has attempted to include all major changes made from the previous edition of the Volume Two, the Board does not give any warranty nor accept any liability in relation to the contents of this list of amendments.

Table 1 List of amendments - NCC 2022 Volume Two
Reference Changes and Commentary
General
Throughout An “Introduction to this Part” has been added to introduce the intent and purpose of every Part of the NCC.
Throughout A number of provisions have been amended, restructured, deleted and relocated as part of the initiative to provide a consistent NCC structure and improve NCC usability.
Section A—Governing requirements
A1G2 A new clause added to specify scope of NCC Volume One.
A1G2 A new clause added to specify scope of NCC Volume Three.
A1G3 A new clause added to specify scope of NCC Volume Three.
A2G2(4)(b) Amended to remove unnecessary duplication.
A5G3 A Note has been included to outline transitional arrangements regarding new numbering system and documentary evidence.
A5G4 A new clause added to limit lead content in copper alloy plumbing products in contact with drinking water.
A5G9 A new clause added to require a NatHERS certificate be issued for the house energy rating software output where house energy rating software is required.
A6G1 The limitation statement has been amended to include a Class 9b early childhood centre.
Specification 1 Schedule 5 in NCC 2019 Amendment 1 has been relocated into new Specification 1 and 2.
Specification 2 Schedule 5 in NCC 2019 Amendment 1 has been relocated into new Specification 1 and 2.
Specification 3 Schedule 6 in NCC 2019 Amendment 1 has been relocated into new Specification 3.
Part H1—Structure
H1D4 Amended to reflect current practice, improve readability and structure including the maximum size and geometry of footings and slabs.
H1D5 Amended to reflect current practice, improve readability and structure including requirements for maximum wind speeds, masonry veneer walls, site soil classifications and design details.
H1D6 Amended to reflect current practice, improve readability and structure.
H1D8 Amended to reflect current practice, improve readability and structure.
H1D11 Amended to improve the title and application requirements for Part 12.3 of the ABCB Housing Provisions.
Part H2—Damp and weatherproofing
H2O1 Amended to improve clarity and includes safeguarding occupants and protect the building from damage from rising damp.
H2P1 Amended as a consequence of replacing ‘average recurrence interval’ with ‘annual exceed probability’.
H2D2 Amended as a consequence of replacing ‘average recurrence interval’ with ‘annual exceed probability’.
H2D4 Amended and includes a new Deemed-to-Satisfy pathway for satisfying weatherproofing of masonry.
H2D6 Sub-clause (2) has been amended to replace ‘average recurrence interval’ with ‘annual exceedance probability’ and Sub-clause (3) has been amended to exclude box gutters from Part 7.4 of the ABCB Housing Provisions.
H2D8 A new clause which incorporates 3.8.1.3 of Volume Two 2019 Amendment 1 to specify the requirements and application of external waterproofing for roofing systems.
Part H3—Fire safety
H3P1 Amended and now contains quantified level of performance for protection of Class 1 buildings from the spread of fire.
H3P2 Amended and now contains quantified level of performance for automatic warning on detection of smoke in Class 1 buildings.
Part H4—Health and amenity
H4D2 Amended as a consequence of moving external waterproofing of H2D8
H4D3 A new clause has been included for installation and materials of wet are components and systems.
H4V5 Amended to include new references to sections of the standard AIRAH DA07 for input assumptions, and new failure criteria included based on a mould index of 3.
Part H6—Energy efficiency
H6O1 Amended to expand the energy efficiency Objectives of Part H6.
H6F1 Amended to expand the energy efficiency Functional Statement of Part H6.
H6P1 Amended to include quantified requirements for the thermal performance of a building.
H6P2 Amended to include quantified requirements for the energy used by a building’s domestic services.
H6V2 Amended to align with changes in Section 13 of the ABCB Housing Provisions and added detailed schedules for calculating heating and cooling loads.
H6V3 Amended to include new ventilation requirements when an air change rate of less than 5m2/m3/hr at 50 Pa reference pressure is achieved.
Specification 42 Amended to consolidate the requirements when using house energy rating software and added the new requirement for net equivalent energy usage.
Specification 44 A new specification has been inserted and contains the methods of calculating heating load limits, cooling load limits and thermal load limits for Performance Requirements H6P1 of Volume Two and J1P2 of Volume One.
Part H7—Ancillary provisions and additional construction requirements
H7P5 Amended and now contains quantified level of performance for design and construction of buildings in bushfire prone areas.
H7P6 Amended and now contains quantified level of performance for design and construction of private bushfire shelters.
Part H8—Livable housing design
H8 A new Part has been inserted containing the Livable housing design requirements. This includes new Objectives, Functional Statements, Performance Requirement and Deemed-to-Satisfy Provisions.
Schedule 1—Definitions
Schedule 1 Schedule 1 has been amended as part of the initiative to improve readability of the NCC. Schedule 1 – Definitions includes Abbreviations, Symbols and Glossary. States & Territory Appendices (formerly located in Schedule 1) have been incorporated into Schedule 3 to Schedule 11.  
Abbreviations Acrylic conformal coating (ACC) has been added.
Abbreviations Acrylic latex (ACL) has been added.
Abbreviations Australian Institute of Refrigeration, Air conditioning and Heating (AIRAH) has been added.
Abbreviations American National Standards Institute (ANSI) has been added.
Abbreviations American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) has been added.
Abbreviations National Standard of Canada (CAN) has been added.
Abbreviations Chartered Institution of Building Services Engineer (CIBSE) has been added.
Abbreviations Flame zone (FZ) has been added.
Abbreviations Greenhouse and Energy Minimum Standards (GEMS) has been added.  
Abbreviations Hot dip galvanising (HDG) has been added.
Abbreviations Inorganic zinc silicate (IZS) has been added.
Abbreviations NATA has been amended to include reference to Australia.
Abbreviations National Sanitation Foundation (NSF) has been added.
Abbreviations Polyurethane (PUR) has been added.
Symbols   µg/N.s has been added.
Symbols   f’c has been added.
Symbols   f’y has been added.
Symbols   G has been added.
Symbols   N/m has been added.
Symbols   Q has been added.
Symbols   ULS has been added.
Glossary A defined term, ‘Above ground rainwater tank’, has been added.
Glossary A defined term, ‘Annual exceedance probability’, has been added as a consequence of amendments to Part 7.4 Gutters and downpipes of the ABCB Housing Provisions.
Glossary A defined term, ‘Assumed cooling thermostat set point’ has been added as a consequence of quantification in J1P2 and H6P1.
Glossary A defined term, ‘Average recurrence interval’, has been deleted as a consequence of amendments to Part 7.4 Gutters and downpipes of the ABCB Housing Provisions.
Glossary A defined term, ‘Bond breaker’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Building complexity criteria’, has been added.
Glossary A defined term, ‘Buried rainwater tank’, has been added as a consequence of amendments to Specification 41 of Volume Three.
Glossary A defined term, ‘Cooling degree hours’ has been added as a consequence of quantification in J1P2 and H6P1.
Glossary A defined term, ‘Daily outdoor temperature range’ has been added as a consequence of quantification in J1P2 and H6P1.
Glossary A defined term, ‘Dehumidification gram hours’, has been added as a consequence of quantification in J1P2 and H6P1.
Glossary A defined term, ‘Design bushfire’, has been added as a consequence of amendments to Part G5.
Glossary The defined term, ‘Domestic services’, has been amended to include on-site renewable energy equipment as a result of quantification in J1P3 and H6P2.
Glossary A defined term, ‘Drainage flange’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Drainage riser’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Efficacy’, has been added as a consequence of including quantified Performance Requirement H3P2 for automatic warning for occupants.
Glossary A defined term, ‘Energy value’, has been added as a consequence of quantification in J1P3 and H6P2.
Glossary A defined term, ‘Engaged pier’, has been added as a consequence of amendments to Section 5 of the ABCB Housing Provisions.
Glossary A defined term, ‘Fire actions’, has been added as a consequence of amendments to Part G5.
Glossary The defined term, ‘Flashing’, has been amended to clarify perimeter and vertical flashings as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary The defined term, ‘Floor area’, for Volume One, has been amended on account of new defined term ‘Volume’.
Glossary A defined term, ‘Floor waste’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary The defined term, ‘Glazing’, has been amended as a consequence of the updates to the energy efficiency Deemed-to-Satisfy provisions for Class 2 buildings.
Glossary A defined term, ‘Heating degree hours’, has been added as a consequence of quantification in J1P2 and H6P1.
Glossary A defined term, ‘Hob’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term ‘Irrigation system’, has been added as a consequence of amendments to S41C2 in Volume Three.
Glossary A defined term, ‘Lateral support’, has been added as a consequence of amendments to Part 5.3 of the ABCB Housing Provisions.
Glossary A defined term, ‘Main water heater’ has been added as a consequence of including new whole-of-home energy efficiency requirements.
Glossary A defined term, ‘Main space conditioning’ has been added as a consequence of including new whole-of-home energy efficiency requirements.
Glossary A defined term, ‘Maximum retained water level’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Membrane’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary The defined term, ‘NABERS Energy for Offices’ has been amended to be ‘NABERS Energy’ to reflect its use for multiple building classifications.
Glossary The defined term, ‘Performance-based design brief’ has been amended for clarity.
Glossary The defined term, ‘Point of connection’, has been amended for clarity.
Glossary A defined term, ‘Preformed shower base’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Primary insulation layer’, has been added as a consequence of amendments to condensation management provisions.
Glossary The defined term, ‘Rainwater harvesting system’, has been amended to ‘Rainwater service’ and ‘Rainwater storage’ as a consequence of amendments to Part B6 of Volume Three.
Glossary The defined term ‘Reference building’ has been amended to remove reference to Thermal comfort levels and as a consequence of the introduction of J1V5.
Glossary A defined term, ‘Reliability’, has been added as a consequence of including quantified Performance Requirements for automatic warning for occupants.
Glossary A defined term, ‘Screed’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary The defined term, ‘Shower area’, has been amended to clarify enclosed and unenclosed shower areas as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Shower screen’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Thermal energy load’, has been added as a consequence of quantification in J1P2 and H6P1.
Glossary The defined term ‘Total R-Value’ in the ABCB Housing Provisions has been amended to align with Volume One.
Glossary The defined term ‘Total System U-Value’ in the ABCB Housing Provisions has been amended to align with Volume One.
Glossary A defined term ‘Unprotected water service’, has been added as a consequence of introducing new provision for unprotected water service – B5D5 of Volume Three.
Glossary A defined term, ‘Vapour permeance’, has been added as a consequence of amendments to the condensation management provisions.
Glossary A defined term, ‘Volume’, has been added to clarify the volume space with respect to a building, fire compartment and atrium.  
Glossary A defined term, ‘Waterproofing system’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Water stop’, has been added as a consequence of amendments to Part 10.2 of the ABCB Housing Provisions.
Glossary A defined term, ‘Weighted average’, has been added as a consequence of amendments to A5G4.
Glossary A defined term, ‘Wetted surface area’, has been added to provide clarification to the defined term ‘Weighted average’.
Schedule 2—Referenced documents
AS/NZS 1170.2 The 2021 edition of AS/NZS 1170 Part 2 ‘Structural design actions — Wind actions’ has been referenced.
AS 1288 The 2021 edition of AS 1288 ‘Glass in buildings — Selection and installation’ has been referenced.
AS 1397 The 2021 edition of AS 1397 ‘Continuous hot-dip metallic coated steel sheet and strip — Coatings of zinc and zinc alloyed with aluminium and magnesium’ has been referenced. A note has been included to outline transitional arrangements.
AS 1530 Parts 1 to 4 The notes to AS 1530 Parts 1 to 4 have been deleted.
AS 1530.8.1 The 2018 edition of AS 1530 Part 8.1 ‘Methods for fire tests on building materials, components and structures — Tests on elements of construction for buildings exposed to simulated bushfire attack — Radiant heat and small flaming sources’ has been referenced.
AS/NZS 1546.1 The 2008 edition of AS/NZS 1546 Part 1 ‘On-site domestic wastewater treatment units — Septic tanks’ has been referenced.
AS/NZS 1546.2 The 2008 edition of AS/NZS 1546 Part 2 ‘On-site domestic wastewater treatment units — Waterless composting toilets’ has been referenced.
AS 1546.3 Amdt 1 of the 2017 edition of AS 1546 Part 3 ‘On-site domestic wastewater treatment units — Secondary treatment systems (incorporating amendment 1)’ has been referenced.
AS 1546.4 The 2016 edition of AS 1546 Part 4 ‘On-site domestic wastewater treatment units — Domestic greywater treatment systems’ has been referenced.
AS/NZS 1547 The 2012 edition of AS/NZS 1547 ‘On-site domestic wastewater management’ has been referenced.
AS/NZS 1562.2 The 1999 edition of AS/NZS 1562 Part 2 ‘Design and installation of sheet roof and wall cladding — Corrugated fibre-reinforced cement’ has been deleted.
AS 1562.3 The 2006 edition of AS 1562 Part 3 ‘Design and installation of sheet roof and wall cladding — Plastic’ has been referenced.  
AS 1670.1 Amdt 1 of the 2018 edition AS 1670 Part 1 ‘Fire detection, warning, control and intercom systems — System design, installation and commissioning — Fire (incorporating amendment 1)’ has been referenced. Notes to AS 1670 have been amended to outline transitional arrangements.  
AS 1670.3 Amdt 1 of the 2018 edition AS 1670 Part 3 ‘Fire detection, warning, control and intercom systems — System design, installation and commissioning — Fire alarm monitoring (incorporating amendment 1)’ has been referenced. Notes to AS 1670 have been amended to outline transitional arrangements.
AS 1670.4 Amdt 1 of the 2018 edition AS 1670 Part 4 ‘Fire detection, warning, control and intercom systems — System design, installation and commissioning — Emergency warning and intercom systems (incorporating amendment 1)’ has been referenced. Notes to AS 1670 have been amended to outline transitional arrangements.
AS 1684.2 The 2021 edition of AS 1684 Part 2 ‘Residential timber-framed construction — Non-cyclonic areas’ has been referenced.
AS 1684.3 The 2021 edition of AS 1684 Part 3 ‘Residential timber-framed construction —Cyclonic areas’ has been referenced.
AS/NZS 1720.4 The 2019 edition of AS/NZS 1720 Part 4 ‘Timber structures — Fire resistance of timber elements’ has been referenced.
AS 1720.5 Amdt 1 of the 2015 edition of AS 1720 Part 5 ‘Timber structures —Nailplated timber roof trusses (incorporating amendment 1)’ has been referenced.
AS/NZS 1859.4 The note to AS/NZS 1859 Part 4 has been deleted.
AS 2118.1 Amdt 2 of the 2017 edition of AS 2118 Part 1 ‘Automatic fire sprinkler systems — General systems (incorporating amendments 1 and 2)’ has been referenced.
AS 2118.4 The 2012 edition of AS 2118 Part 4 ‘Automatic fire sprinkler systems — Sprinkler protection for accommodation buildings not exceeding four storeys in height’.
AS 2118.5 The 2008 edition of AS 2118 Part 5 ‘Automatic fire sprinkler systems — Home fire sprinkler systems’ has been referenced.
AS 2118.6 The 2012 edition of AS 2118 Part 6 ‘Automatic fire sprinkler systems — Combined sprinkler and hydrant systems in multistorey buildings.’
AS/NZS 2293.1 Amdt 1 of the 2018 edition of AS/NZS 2293 Part 1 ‘Emergency lighting and exit signs for buildings — System design, installation and operation (incorporating amendment 1)’ has been referenced.
AS 2312.1 The 2014 edition of AS 2312 Part 1 ‘Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings — Paint coatings’ has been referenced.
AS/NZS 2312.2 The 2014 edition of AS/NZS 2312 Part 2 ‘Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings — Hot dip galvanizing’ has been referenced.
AS/NZS 2327 Amdt 1 of the 2017 edition of AS/NZS 2327 ‘Composite structures — composite steel-concrete construction in buildings (incorporating amendment 1)’ has been referenced.
AS 2419.1 The 2021 edition of AS 2419 Part 1 ‘Fire hydrant installations — System design, installation and commissioning’ has been referenced.
AS 2441 The 2005 edition of AS 2441 ‘Installation of fire hose reels (incorporating amendment 1) has been referenced.
AS 2699.1 The 2020 edition of AS 2699 Part 1 ‘Built-in components for masonry construction — Wall ties’ has been referenced. A note has been included to outline transitional arrangements.
AS 2699.3 The 2020 edition of AS 2699 Part 3 ‘Built-in components for masonry construction — Lintels and shelf angles (durability requirements)’ has been referenced. A note has been included to outline transitional arrangements.
AS/NZS 3500.0 The 2021 edition of AS 3500 Part 0 ‘Plumbing and drainage — Glossary of terms’ has been referenced.
AS/NZS 3500.1 The 2021 edition of AS 3500 Part 1 ‘Plumbing and drainage — Water services’ has been referenced.
AS/NZS 3500.2 Amdt 1 of the 2021 edition of AS 3500 Part 2 ‘Plumbing and drainage — Sanitary plumbing and drainage (incorporating amendment 1)’ has been referenced.
AS/NZS 3500.3 The 2021 edition of AS 3500 Part 3 ‘Plumbing and drainage — Stormwater drainage’ has been referenced. A note has been included to outline transitional arrangements.
AS/NZS 3500.4 The 2021 edition of AS 3500 Part 4 ‘Plumbing and drainage — Heated water services’ has been referenced.
AS 3600 Amdt 2 of the 2018 edition of AS 3600 ‘Concrete structures (incorporating amendments 1 and 2)’ has been referenced.
AS 3740 The 2021 edition of AS 3740 ‘Waterproofing of domestic wet areas’ has been referenced.
AS 3959 Amdts 1 and 2 of the 2018 edition of AS 3959 ‘Construction of buildings in bushfire-prone areas (incorporating amendments 1 and 2)’ has been referenced.
AS 4055 The 2021 edition of AS 4055 ‘Wind loads for housing’ has been referenced.
AS 4072.1 The note to AS 4072 Part 1 has been deleted.
AS 4100 The 2020 edition of AS 4100 ‘Steel structures’ has been referenced.
AS 4200.1 Amdt 1 of the 2017 edition of AS 4200 Part 1 ‘Pliable building membranes and underlays — Materials (incorporating amendment 1)’ has been referenced.
AS 4200.2 Amdts 1 and 2 of the 2017 edition of AS 4200 Part 2 ‘Pliable building membranes and underlays — Installation (incorporating amendments 1 and 2)’ has been referenced.
AS/NZS 4234 The 2021 edition of AS/NZS 4234 ‘Heated water systems — Calculation of energy consumption’ has been referenced.
AS 4254.1 The 2021 edition of AS 4254 Part 1 ‘Ductwork for air-handling systems in buildings — Flexible duct’ has been referenced.
AS/NZS 4256.1 The 1994 edition of AS/NZS 4256 Part 1 ‘Plastic roof and wall cladding materials — General requirements’ has been deleted.
AS/NZS 4256.2 The 1994 edition of AS/NZS 4256 Part 2 ‘Plastic roof and wall cladding materials — Unplasticized polyvinyl chloride (uPVC) building sheets’ has been deleted.
AS/NZS 4256.3 The 1994 edition of AS/NZS 4256 Part 3 ‘Plastic roof and wall cladding materials — Glass fibre reinforced polyester (GRP)’ has been deleted.
AS/NZS 4256.5 The 1996 edition of AS/NZS 4256 Part 5 ‘Plastic roof and wall cladding materials — Polycarbonate’ has been deleted.
AS 4773.2 Amdt 1 of the 2015 edition of AS 4773 Part 2 ‘Masonry in small buildings — Construction’ has been referenced.
AS/NZS 4858 The 2004 edition of AS/NZS 4858 ‘Wet area membranes’ has been referenced.
AS 5146.3 The 2018 edition of AS 5146 Part 3 ‘Reinforced Autoclaved Aerated Concrete — Construction’ has been referenced.
AS 5216 The 2021 edition of AS 5216 ‘Design of post-installed and cast-in fastenings in concrete’ has been referenced.
AS/NZS 5601.1 The 2013 edition of AS/NZS 5601 Part 1 ‘Gas installations — General installations’ has been referenced.
AIRAH-DA07 The 2021 edition of AIRAH-DA07 ‘Criteria for moisture control design analysis in buildings’ has been referenced.
ASTM E903 The 2012 edition of ASTM E903 ‘Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres’ has been deleted.
ASTM E96 The 2016 edition of ASTM E96 ‘Standard Test Methods for Water Vapor Transmission of Materials’ has been referenced.
ABCB The 2022 version of the ABCB ‘Fire Safety Verification Method’ Standard has been referenced. As a consequence, the FSVM is deleted as a standalone schedule.
ABCB The 2022 version of the ABCB ‘Housing Provisions’ Standard has been referenced.
ABCB The 2022 version of the ABCB ‘Livable Housing Design’ Standard has been referenced.
ABCB The 2022 version of the ABCB ‘Standard for NatHERS Heating and Cooling Load Limits’ has been referenced.
ABCB The 2022 version of the ABCB ‘Standard for Whole-of-home Efficiency Factors’ has been referenced.
FPAA101D The 2021 edition of FPAA101D ‘Automatic Fire Sprinkler System Design and Installation — Drinking Water Supply’ has been referenced.
FPAA101H Amdt 1 of the 2018 edition of FPAA101H ‘Automatic Fire Sprinkler System Design and Installation — Hydrant Water Supply (incorporating amendment 1)’ has been referenced.
NASH Standard The 2021 edition of NASH Standard ‘Steel Framed Construction in Bushfire Areas’ has been referenced.
NSF/ANSI/CAN 372 The 2020 edition of NSF/ANS/CAN 372 ‘Drinking Water System Components — Lead Content’ has been referenced.