Building Sealing Building Codes & Rules

- Enhance comfort & energy efficiency with Tools™ – your graphical guide to NCC compliance for thermal solutions & building sealing. Optimise R-Value for savings.

Framing Overview

Concrete Slab

Do not breach any Termite Barrier^[1]

Insulation for Slab on Ground RULES

NCC 2022 V6

Class 1 & 10a

NCC 2022 HP 13.2.6 [2019: 3.12.1.5]

May 2023

NCC 2022 HP, 13.2.6 (5)

NCC 2022 HP, 13.2.6 (5) (a) (i)

NCC 2022 HP, 13.2.6 (5) (a) (ii)

NCC 2022 HP, 13.2.6 (5) (b) (i)

NCC 2022 HP, 13.2.6 (5) (b) (ii)

NCC 2022 HP, 13.2.6 (4)

NCC 2022 HP, 13.2.6 (6) (b) (i)

NCC 2022 HP, 13.2.6 (6) (b) (ii)

NCC 2022 HP, 13.2.6 (6) (a)

NCC 2022 HP, 13.2.6 (6) (b)

NCC 2022 HP, 13.2.6 (7)

Standard Concrete Slabs excluding Waffle-Pods^{NCC 2022 HP, 13.2.6 (5)}
Climate Zones 6 & 7
R ≥ 0.64 Slab Edge^{NCC 2022 HP, 13.2.6 (5) (a) (i)}
R ≥ 0.64 Under Slab^{NCC 2022 HP, 13.2.6 (5) (a) (ii)}
Climate Zone 8
R ≥ 1.0 Slab Edge^{NCC 2022 HP, 13.2.6 (5) (b) (i)}
R ≥ 2.0 Under Slab^{NCC 2022 HP, 13.2.6 (5) (b) (ii)}
Insulation for Heated & Cooled Slabs for all climates
R ≥ 1.0 Slab Edge^{NCC 2022 HP, 13.2.6 (4)}
≥ 300mm depth or full depth of Slab Edge perimeter^{NCC 2022 HP, 13.2.6 (6) (b) (i)NCC 2022 HP, 13.2.6 (6) (b) (ii)}
Water-resistant material^{NCC 2022 HP, 13.2.6 (6) (a)}
Installed continuously from FFL^{NCC 2022 HP, 13.2.6 (6) (b)}
Bathroom Exception^{NCC 2022 HP, 13.2.6 (7)}
Heating & Cooling Systems solely in bathrooms or similar areas are exempted from perimeter insulation requirement

NCC 2022 HP, 13.2.6

Do not breach any Termite Barrier^{NCC 2022 HP, 13.2.6}

Insulation

NCC 2022 HP, 13.2.3 (7) (b)

Steel Framing (Roof)^{NCC 2022 HP, 13.2.3 (7) (b)}

R ≥ 0.2 for thermal breaks to prevent thermal bridging

NCC 2022 HP, 13.2.2 (3) (b)

≥ 50^{NCC 2022 HP, 13.2.2 (3) (b)}

Sarking

NCC 2022 HP, 13.2.5 (5)

Steel Framing (Wall)

For External & Internal Linings directly attached to Frame
R ≥ 0.2 for thermal breaks to prevent thermal bridging^{NCC 2022 HP, 13.2.5 (5)}

Lap or Tape

Insulation

NCC 2022 HP, 13.2.6

Under Floor insulation^{NCC 2022 HP, 13.2.6}

Insulated from unconditioned space below or Subfloor
Additional Insulation required where in Floor Heating System

NCC 2022 HP, 13.2.2 (2) (d) (i)

≥ 150^{NCC 2022 HP, 13.2.2 (2) (d) (i)}

NCC 2022 HP, 13.2.2 (2) (d) (i)

≥ 150^{NCC 2022 HP, 13.2.2 (2) (d) (i)}

Doors

Sealed to restrict air infiltration^[1]

Doors RULES

NCC 2022 V1

Class 1 & 10a

NCC 2022 Part 13.4.4 [2019: 3.12.3.3]

May 2023

NCC 2022 HP, 13.4.4 (2)

NCC 2022 HP, 13.4.4 (2) (a)

NCC 2022 HP, 13.4.4 (2) (b)

Fully sealed^{NCC 2022 HP, 13.4.4 (2)}
Bottom edge with draft protection^{NCC 2022 HP, 13.4.4 (2) (a)}
Other edges with foam or rubber Compressible Strips^{NCC 2022 HP, 13.4.4 (2) (b)}

NCC 2022 HP, 13.4.4 (2)

Sealed to restrict air infiltration^{NCC 2022 HP, 13.4.4 (2)}

Sarking

Airspace to external finish required by R-Value^[1]
Close fittings^[2]
Supported^[3]
≥ 150mm overlapping or tape^[4][5]

Thermal Insulation Sarking RULES

NCC 2022 V1

Class 1 & 10a

NCC 2022 Part 13.2.2 [2019: 3.12.1.1]

May 2023

NCC 2022 HP, 13.2.2 (2) (a)

NCC 2022 HP, 13.2.2 (2) (b)

NCC 2022 HP, 13.2.2 (2) (c)

NCC 2022 HP, 13.2.2 (2) (d) (i)

NCC 2022 HP, 13.2.2 (2) (d) (ii)

Provide necessary airspace to external finish as required by R-Value^{NCC 2022 HP, 13.2.2 (2) (a)}
Close fittings to any Penetrations, Windows, or Doors^{NCC 2022 HP, 13.2.2 (2) (b)}
Supported by Frames^{NCC 2022 HP, 13.2.2 (2) (c)}
Adjoining sheet
≥ 150mm overlap^{NCC 2022 HP, 13.2.2 (2) (d) (i)}, or
Taped^{NCC 2022 HP, 13.2.2 (2) (d) (ii)}

NCC 2022 HP, 13.2.2 (2) (d) (i)

NCC 2022 HP, 13.2.2 (2) (d) (ii)

NCC 2022 HP, 13.2.2 (2) (a)

NCC 2022 HP, 13.2.2 (2) (b)

NCC 2022 HP, 13.2.2 (2) (c)

Airspace to external finish required by R-Value^{NCC 2022 HP, 13.2.2 (2) (d) (i)}
Close fittings^{NCC 2022 HP, 13.2.2 (2) (d) (ii)}
Supported^{NCC 2022 HP, 13.2.2 (2) (a)}
≥ 150mm overlapping or tape^{NCC 2022 HP, 13.2.2 (2) (b)NCC 2022 HP, 13.2.2 (2) (c)}

Insulation

Abuts or overlaps adjoining^[1]
Continuous barrier^[2]
Maintain thickness & position^[3]

Insulation RULES

NCC 2022 V1

Class 1 & 10a

NCC 2022 Part 13.2.2 [2019: 3.12.1.1]

May 2023

NCC 2022 HP, 13.2.2 (1) (a)

NCC 2022 HP, 13.2.2 (1) (b)

NCC 2022 HP, 13.2.2 (2) (b)

NCC 2022 HP, 13.2.2 (2) (c)

NCC 2022 HP, 13.2.2 (3) (a)

NCC 2022 HP, 13.2.2 (1) (c)

Abuts or overlaps adjoining Insulation^{NCC 2022 HP, 13.2.2 (1) (a)}
Continuous Barrier^{NCC 2022 HP, 13.2.2 (1) (b)}
Fit firmly between supporting members^{NCC 2022 HP, 13.2.2 (2) (b)NCC 2022 HP, 13.2.2 (2) (c)}
Maintain specified thickness^{NCC 2022 HP, 13.2.2 (3) (a)}
Installation should not interfere with safety or performance of services & fittings^{NCC 2022 HP, 13.2.2 (1) (c)}

NCC 2022 HP, 13.2.2 (1) (a)

NCC 2022 HP, 13.2.2 (1) (b)

NCC 2022 HP, 13.2.2 (3) (a)

Abuts or overlaps adjoining^{NCC 2022 HP, 13.2.2 (1) (a)}
Continuous barrier^{NCC 2022 HP, 13.2.2 (1) (b)}
Maintain thickness & position^{NCC 2022 HP, 13.2.2 (3) (a)}

Recessed Lights

Non-IC type cannot be covered or abutted^[1]
CA90 type can be abutted, but not covered^[2]
IC type can be covered or abutted^[3]
IC4 type can be covered or abutted^[4]

Recessed Light Fittings TYPES

NCC 2022 V2

All Building Classes

NCC 2022 13.2.3 [2019: 3.12.1.2]

May 2023

AS/NZS 3000:2018, 4.5.2.3.4 (a)

AS/NZS 3000:2018, 4.5.2.3.4 (c)

AS/NZS 3000:2018, 4.5.2.3.4 (e)

AS/NZS 3000:2018, 4.5.2.3.4 (f)

AS/NZS 3000:2018, 4.5.2.3.1 (b) (iii) (B)

NCC 2022 HP, 13.2.3

Building elements requiring energy use to be protected, secure, & energy efficient to the NCC^{AS/NZS 3000:2018, 4.5.2.3.4 (a)}
Non-IC type^{AS/NZS 3000:2018, 4.5.2.3.4 (c)}
Cannot be covered or placed next to flammable materials & insulation
CA90 type^{AS/NZS 3000:2018, 4.5.2.3.4 (e)}
Can be next to insulation but cannot be covered during normal use
Limited access for insulation & debris to hot parts
IC type^{AS/NZS 3000:2018, 4.5.2.3.4 (f)}
Can be covered & placed next to flammable materials & insulation
IC4 type^{AS/NZS 3000:2018, 4.5.2.3.1 (b) (iii) (B)}
Can be covered & placed next to flammable materials & insulation
Sealed with restricted airflow
≥ 100mm Clearance ^{NCC 2022 HP, 13.2.3}

AS/NZS 3000:2018, 4.5.2.3.4 (a)

AS/NZS 3000:2018, 4.5.2.3.4 (c)

AS/NZS 3000:2018, 4.5.2.3.4 (e)

AS/NZS 3000:2018, 4.5.2.3.4 (f)

Non-IC type cannot be covered or abutted^{AS/NZS 3000:2018, 4.5.2.3.4 (a)}
CA90 type can be abutted, but not covered^{AS/NZS 3000:2018, 4.5.2.3.4 (c)}
IC type can be covered or abutted^{AS/NZS 3000:2018, 4.5.2.3.4 (e)}
IC4 type can be covered or abutted^{AS/NZS 3000:2018, 4.5.2.3.4 (f)}

Roof Lights

Sealed to restrict air infliltration^[1]

Rooflight RULES

NCC 2022 V1

All Building Classes

NCC 2022 Part 13.2.4 [2019: 3.12.1.3]

May 2023

NCC 2022 HP, 13.2.4 (a)

NCC 2022 HP, 13.2.4 (b) (i)

NCC 2022 HP, 13.2.4 (b) (ii)

≤ 5% of Floor Area it serves^{NCC 2022 HP, 13.2.4 (a)}
Material performance of transparent & translucent elements including Diffusers
Follow Solar Heat Gain Coefficient (SHGC) Table below^{NCC 2022 HP, 13.2.4 (b) (i)}
≤ U3.9 Thermal U-Value^{NCC 2022 HP, 13.2.4 (b) (ii)}

Sealing Climate Zone 4 to 8 RULES

NCC 2022 V1

Class 1 & 10a

NCC 2022 HP13.4.3 [2019: 3.12.3.2]

May 2023

NCC 2022 HP, 13.4.3 (2) (b)

NCC 2022 HP, 13.4.3 (2) (a)

NCC 2022 HP, 13.4.3 (2) (c)

Seal with a weatherproof material^{NCC 2022 HP, 13.4.3 (2) (b)}
Install ceiling Diffuser at Ceiling or internal lining level^{NCC 2022 HP, 13.4.3 (2) (a)}
Install manual, mechanical, or electronic Shutter system^{NCC 2022 HP, 13.4.3 (2) (c)}
Readily operated

NCC 2022 HP, 13.4.3

Sealed to restrict air infliltration^{NCC 2022 HP, 13.4.3}

Windows & Glazing

Sealed to restrict air infiltration^[1]

Window SEALING

NCC 2022 V1

Class 1 & 10a

NCC 2022 Part 13.4.4 [2019: 3.12.3.3]

May 2023

NCC 2022 HP, 13.4.4 (2)

NCC 2022 HP, 13.4.4 (2) (a)

NCC 2022 HP, 13.4.4 (2) (b)

Fully sealed^{NCC 2022 HP, 13.4.4 (2)}
Bottom edge with draft protection^{NCC 2022 HP, 13.4.4 (2) (a)}
Other edges with foam or rubber Compressible Strips^{NCC 2022 HP, 13.4.4 (2) (b)}

NCC 2022 HP, 13.4.4 (2)

Sealed to restrict air infiltration^{NCC 2022 HP, 13.4.4 (2)}