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13.2
Part 13.2 Building fabricPart 13.2 Building fabric
13.2.1
Application of Part 13.2
2019: 3.12.1
13.2.1
Application of Part 13.2
2019: 3.12.1
Application of Part 13.2
- a Class 1 building; and
- a Class 10a building with a conditioned space.
13.2.2
Building fabric thermal insulation
2019: 3.12.1.1
13.2.2
Building fabric thermal insulation
2019: 3.12.1.1
- abuts or overlaps adjoining insulation other than at supporting members such as columns, studs, noggings, joists, furring channels and the like where the insulation must butt against the member; and
- forms a continuous barrier with ceilings, walls, bulkheads, floors or the like that inherently contribute to the thermal barrier; and
- does not affect the safe or effective operation of a domestic service or fitting.
- the necessary airspace, to achieve the required R-Value between a reflective side of the reflective insulation and a building lining or cladding; and
- the reflective insulation closely fitted against any penetration, door or window opening; and
- the reflective insulation adequately supported by framing members; and
- each adjoining sheet of roll membrane being—
- overlapped greater than or equal to 150 mm; or
- taped together.
- it maintains its position and thickness, other than where it crosses roof battens, water pipes, electrical cabling or the like; and
- in a ceiling, where there is no bulk insulation or reflective insulation in the external wall beneath, it overlaps the external wall by greater than or equal to 50 mm.
Explanatory information: Example
- In a two storey house with the second storey set back, the insulation in the first storey wall, the second storey wall and the roof over the set-back must be continuous. Therefore if the roof over the set-back has insulation on a horizontal ceiling, then insulation is also needed on the vertical in any ceiling space in order to connect the ceiling insulation to the second storey wall.
- To form a continuous barrier, insulation should be placed in gaps between window and door jambs, heads and sills, and the adjoining wall framing unless a gap is otherwise required. This may need to be compressible to allow for movement between members.
Explanatory information: Safety of domestic services
Care should be taken when installing insulation to ensure that it does not interfere with the safety or performance of domestic services and fittings such as heating flues, recessed light fittings, light transformers, gas appliances and general plumbing and electrical components. This includes providing appropriate clearance as detailed in relevant legislation and referenced standards such as for electrical, gas and fuel oil installations.
Explanatory information: Compression of insulation
The R-Value of insulation, including insulation used to mitigate thermal bridging, is reduced if it is compressed. The allocated space for insulation must therefore allow the insulation to be installed so that it maintains its correct thickness to achieve the product’s stated R-Value. Otherwise the R-Value needs to be reduced to account for any compression. This is particularly relevant to wall and cathedral ceiling framing whose members can only accommodate a limited thickness of insulation. In some instances, larger framing members or thinner insulation material, such as rigid boards, may be necessary to ensure that the insulation achieves its required R-Value.
Explanatory information: Installation of reflective insulation
For reflective insulation and the adjoining airspace to achieve its tested R-Value, the airspace needs to be a certain width. This width varies depending on the particular type of reflective insulation. The R-Value also depends on the orientation of the insulation.
Where reflective insulation also acts as a vapour barrier or sarking, both a minimum overlap and taping may be necessary.
13.2.3
Roofs and ceilings
2019: 3.12.1.2
13.2.3
Roofs and ceilings
2019: 3.12.1.2
- has metal sheet roofing directly fixed to metal purlins, metal rafters or metal battens; and
- does not have a ceiling lining or has a ceiling lining fixed directly to those metal purlins, metal rafters or metal battens,
must have a thermal break, consisting of a material with an R-Value of greater than or equal to 0.2, installed between the metal sheet roofing and its supporting metal purlins, metal rafters or metal battens.
Roofs and ceilings
- in climate zone 1, in accordance with Tables 13.2.3a, 13.2.3b, 13.2.3j and 13.2.3k as applicable; and
- in climate zone 2, in accordance with Tables 13.2.3c and 13.2.3l as applicable; and
- in climate zone 3, in accordance with Tables 13.2.3d and 13.2.3m as applicable; and
- in climate zone 4, in accordance with Tables 13.2.3e and 13.2.3n as applicable; and
- in climate zone 5, in accordance with Tables 13.2.3f and 13.2.3o as applicable; and
- in climate zone 6, in accordance with Tables 13.2.3g and 13.2.3p as applicable; and
- in climate zone 7, in accordance with Tables 13.2.3h and 13.2.3q as applicable; and
- in climate zone 8, in accordance with Tables 13.2.3i and 13.2.3r as applicable.
- have a surface emittance of not more than 0.05; and
- be adjacent to a roof space of not less than 20 mm; and
- in climate zones 3 to 8, be downward facing.
- for a pitched roof with a horizontal ceiling—
- achieving the Total R-Value in Table 13.2.3s, calculated using a method that accounts for the effects of thermal bridging; or
- increasing the R-Value of the insulation between the ceiling frames by R0.5 more than the R-Value derived from (1); or
- adding a continuous ceiling insulation layer with a minimum R-Value of R0.13 above or below the ceiling joists or the bottom chords of the trusses; or
- achieving the required ceiling R-Value derived from (1) by stacking two layers of insulation immediately on top of each other, such that the top layer is orientated to cover the ceiling joists or bottom chords of the trusses and has an R-Value of at least R0.5; or
- for a flat, skillion or cathedral roof—
- achieving the Total R-Value in Table 13.2.3t, calculated using a method that accounts for the effects of thermal bridging; or
- complying with Table 13.2.3u.
- greater than R3.0 and less than or equal to R4.5, it may be reduced to R3.0 within 450 mm of an external wall; or
- greater than R4.5, it may be reduced to R3.0 within 450 mm of an external wall, provided all other required ceiling insulation is increased by R0.5.
- has metal sheet roofing directly fixed to metal purlins, metal rafters or metal battens; and
- does not have a ceiling lining or has a ceiling lining fixed directly to those metal purlins, metal rafters or metal battens,
must have a thermal break, consisting of a material with an R-Value of greater than or equal to 0.2, installed between the metal sheet roofing and its supporting metal purlins, metal rafters or metal battens.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤0 .64 |
---|---|---|---|---|---|---|---|
Vented | Yes | < 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 3.5 |
≥ 1.0 to < 1.5 | 1.5 | 1.5 | 2.0 | 2.5 | 3.0 | ||
≥ 1.5 | 1.5 | 2.0 | 2.0 | 2.0 | 2.0 | ||
No | < 1.0 | 2.5 | 4.5 | X | X | X | |
≥ 1.0 to < 1.5 | 2.0 | 3.0 | 4.0 | 5.0 | X | ||
≥ 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 | ||
Standard | Yes | < 1.0 | 1.5 | 2.0 | 2.5 | 4.0 | X |
≥ 1.0 to < 1.5 | 1.5 | 1.5 | 2.0 | 3.0 | 4.0 | ||
≥ 1.5 | 1.5 | 1.5 | 2.0 | 2.5 | 3.0 | ||
No | < 1.0 | 3.5 | X | X | X | X | |
≥ 1.0 to < 1.5 | 2.0 | 3.5 | 5.5 | X | X | ||
≥ 1.5 | 2.0 | 2.0 | 3.5 | 4.0 | 6.0 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA≤ 0.23 | 0.23< SA≤0.32 | 0.32< SA≤0.42 | 0.42< SA≤0.53 | 0.53< SA≤0.64 |
---|---|---|---|---|---|---|---|
Vented | Yes | < 1.0 | 1.5 | 1.5 | 1.5 | 1.5 | 2.0 |
≥ 1.0 to < 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | ||
≥ 1.5 to < 2.0 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | ||
≥ 2.0 | 1.5 | 1.5 | 1.5 | 2.0 | 2.0 | ||
No | < 1.0 | 2.0 | 2.5 | 4.0 | 5.0 | X | |
≥ 1.0 to < 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 2.5 | ||
≥ 1.5 to < 2.0 | 1.5 | 1.5 | 1.5 | 2.0 | 2.0 | ||
≥ 2.0 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | ||
Standard | Yes | < 1.0 | 1.5 | 1.5 | 2.0 | 3.0 | 4.0 |
≥ 1.0 to < 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 2.5 | ||
≥ 1.5 to < 2.0 | 1.5 | 1.5 | 1.5 | 1.5 | 2.0 | ||
≥ 2.0 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | ||
No | < 1.0 | 2.5 | 4.0 | 6.0 | X | X | |
≥ 1.0 to < 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 4.0 | ||
≥ 1.5 to < 2.0 | 1.5 | 1.5 | 2.0 | 2.0 | 2.5 | ||
≥ 2.0 | 1.5 | 1.5 | 1.5 | 2.0 | 2.5 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.64 |
---|---|---|---|---|---|---|
Vented | Yes | Any | 2.5 | |||
No | < 0.5 | 2.5 | 3.0 | 3.0 | 3.5 | |
≥ 0.5 | 2.5 | |||||
Standard | Yes | Any | 2.5 | |||
No | < 0.5 | 3.0 | 3.0 | 3.5 | 4.0 | |
≥ 0.5 to < 1.0 | 2.5 | 2.5 | 2.5 | 3.0 | ||
≥ 1.0 | 2.5 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 |
---|---|---|---|---|---|---|---|
Vented | Yes | < 0.5 | 2.5 | ||||
≥ 0.5 to < 1.0 | 2.0 | ||||||
≥ 1.0 to < 1.5 | 2.0 | 2.5 | 2.5 | 2.5 | 2.5 | ||
≥ 1.5 to < 2.0 | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 | ||
≥ 2.0 | 2.5 | 2.5 | 3.0 | 3.0 | 3.0 | ||
No | < 0.5 | 3.5 | 4.0 | 4.5 | 5.0 | X | |
≥ 0.5 to < 1.0 | 3.0 | 3.5 | 3.5 | 4.0 | 4.5 | ||
≥ 1.0 to < 1.5 | 2.5 | 3.0 | 3.0 | 3.0 | 3.5 | ||
≥ 1.5 to < 2.0 | 2.5 | 3.0 | 3.0 | 3.0 | 3.0 | ||
≥ 2.0 | 2.5 | 2.5 | 3.0 | 3.0 | 3.0 | ||
Standard | Yes | < 0.5 | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 |
≥ 0.5 to < 1.0 | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 | ||
≥ 1.0 to < 1.5 | 2.0 | 2.0 | 2.0 | 2.0 | 2.5 | ||
≥ 1.5 to < 2.0 | 2.0 | 2.5 | 2.5 | 2.5 | 3.0 | ||
≥ 2.0 | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 | ||
No | < 0.5 | 3.5 | 4.0 | 5.0 | X | X | |
≥ 0.5 to < 1.0 | 3.0 | 3.0 | 3.5 | 4.0 | 5.0 | ||
≥ 1.0 to < 1.5 | 2.5 | 2.5 | 3.0 | 3.0 | 3.5 | ||
≥ 1.5 to < 2.0 | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 | ||
≥ 2.0 | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA ≤ 0.23 | 0.23 < SA ≤ 0.64 |
---|---|---|---|---|
Vented | Yes | < 0.5 | 3.0 | 3.5 |
≥ 0.5 | 3.0 | |||
No | Any | 3.5 | ||
Standard | Yes | Any | 3.0 | |
No | ≤ 0.5 | 3.5 | ||
> 0.5 | 3.0 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA ≤ 0.42 | 0.42 < SA ≤ 0.64 |
---|---|---|---|---|
Vented | Yes | < 0.5 | 3.0 | 2.5 |
≥ 0.5 | 2.5 | |||
No | < 2.0 | 3.0 | ||
≥ 2.0 | 2.5 | |||
Standard | Yes | Any | 2.5 | |
No | ≤ 0.5 | 3.0 | ||
> 0.5 to < 2.0 | 2.5 | |||
≥ 2.0 | 3.0 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | 0.23 ≤ SA ≤ 0.64 | 0.64 < SA ≤ 0.96 |
---|---|---|---|---|
Vented | Yes | < 1.0 | 4.0 | 3.5 |
≥ 1.0 | 3.5 | |||
No | < 1.0 | 4.0 | ||
≥ 1.0 | 3.5 | |||
Standard | Yes | < 1.0 | 3.5 | |
≥ 1.0 | 3.0 | |||
No | < 1.0 | 4.0 | ||
≥ 1.0 | 3.5 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is ventilated to outdoor air through evenly distributed openings with Table 10.8.3; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- In climate zones 6, 7 and 8, roof ventilation must comply with 10.8.3.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 | 0.64 < SA ≤ 0.73 | 0.73 < SA ≤ 0.85 | 0.85 < SA ≤ 0.96 |
---|---|---|---|---|---|---|---|---|---|---|
Vented | Yes | < 1.0 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 |
≥ 1.0 | 4.5 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | ||
No | < 1.0 | 5.0 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 3.5 | 3.5 | |
≥ 1.0 to < 1.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | ||
≥ 1.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | ||
Standard | Yes | < 1.0 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 |
≥ 1.0 | 4.0 | |||||||||
No | < 1.0 | 5.0 | 4.5 | 4.5 | 4.0 | 4.0 | 3.5 | 3.5 | 3.5 | |
≥ 1.0 to < 1.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | 3.5 | ||
≥ 1.5 to < 2.0 | 4.0 | |||||||||
≥ 2.0 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is ventilated to outdoor air through evenly distributed openings in accordance with Table 10.8.3; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Roof ventilation | Reflective insulation under-roof | Under-roof insulation R-Value | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 | 0.64 < SA ≤ 0.73 | 0.73 < SA ≤ 0.85 | 0.85 < SA ≤ 0.96 |
---|---|---|---|---|---|---|---|---|---|---|
Vented | Yes | < 1.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 |
≥ 1.5 to < 2.0 | 4.5 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | ||
≥ 2.0 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | ||
No | < 1.0 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 3.5 | 3.5 | 3.0 | |
≥ 1.0 to < 1.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | ||
≥1.5 | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | ||
Standard | Yes | < 1.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | 3.5 | 3.5 |
≥ 1.0 to < 1.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | 3.5 | ||
≥ 1.5 to < 2.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | ||
≥ 2.0 | 4.0 | |||||||||
No | < 1.0 | 4.5 | 4.0 | 4.0 | 3.5 | 3.5 | 3.0 | 3.0 | 3.0 | |
≥ 1.0 to < 1.5 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | 3.5 | 3.5 | 3.5 | ||
≥ 1.5 to < 2.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | 3.5 | 3.5 | ||
≥ 2.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | 3.5 |
Table Notes
- SA = solar absorptance.
- A roof is considered ‘vented’ if it—
- has one wind-driven roof ventilator per 50 m2 of ceiling area, with gable, eave or ridge vents; or
- has one powered roof ventilator per 200 m2 of ceiling area, with gable, eave or ridge vents; or
- is ventilated to outdoor air through evenly distributed openings in accordance with Table 10.8.3; or
- is a tiled roof without sarking-type material at roof level.
- If a roof is not ‘vented’, it is a ‘standard’ roof.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Reflective insulation under-roof | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 |
---|---|---|---|---|---|
Yes | 1.0 | 2.0 | 2.0 | 4.0 | 4.0 |
No | 1.0 | 3.5 | X | X | X |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on the top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
Reflective insulation under-roof | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 |
---|---|---|---|---|---|
Yes | 1.5 | 1.5 | 2.0 | 3.0 | 4.0 |
No | 1.5 | 3.5 | 5.0 | X | X |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
Reflective insulation under-roof | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 |
---|---|---|---|---|---|
Yes | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
No | 3.0 | 3.0 | 3.5 | 4.0 | 4.0 |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Reflective insulation under-roof | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 |
---|---|---|---|---|---|
Yes | 2.0 | 2.0 | 2.5 | 2.5 | 2.5 |
No | 3.5 | 4.0 | 5.0 | X | X |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
Reflective insulation under-roof | SA ≤ 0.64 |
---|---|
Yes | 3.0 |
No | 3.5 |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Reflective insulation under-roof | SA ≤ 0.64 |
---|---|
Yes | 2.5 |
No | 3.0 |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Reflective insulation under-roof | 0.23 ≤ SA < 0.64 | SA = 0.64 | 0.64 < SA ≤ 0.96 |
---|---|---|---|
Yes | 4.0 | 3.5 | 4.0 |
No | 4.0 | 4.0 | 4.0 |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Reflective insulation under-roof | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 | 0.64 < SA ≤ 0.73 | 0.73 < SA ≤ 0.85 | 0.85 < SA ≤ 0.96 |
---|---|---|---|---|---|---|---|---|
Yes | 4.5 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 |
No | 5.0 | 4.5 | 4.5 | 4.0 | 4.0 | 3.5 | 3.5 | 3.5 |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Reflective insulation under-roof | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 | 0.64 < SA ≤ 0.73 | 0.73 < SA ≤ 0.85 | 0.85 < SA ≤ 0.96 |
---|---|---|---|---|---|---|---|---|
Yes | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 3.5 | 3.5 | 3.5 |
No | 4.5 | 4.0 | 4.0 | 3.5 | 3.5 | 3.0 | 3.0 | 3.0 |
Table Notes
- SA = solar absorptance.
- The R-Value can be achieved by installing insulation under the roof or on top of the ceiling or a combination of both.
- The R-Value of reflective insulation is not to be included in the R-Value of any under-roof or ceiling insulation.
- R-Values listed are for the labelled, declared R-Value of insulation.
Minimum ceiling insulation R-Value from Tables 13.2.3a to 13.2.3i as applicable | Minimum ceiling Total R-Value |
---|---|
1.5 | 1.38 |
2.0 | 1.74 |
2.5 | 2.09 |
3.0 | 2.43 |
3.5 | 2.63 |
4.0 | 2.95 |
4.5 | 3.27 |
5.0 | 3.59 |
5.5 | 3.91 |
6.0 | 4.23 |
Table Notes
- The Total R-Value calculation only includes the ceiling frame, insulation and ceiling lining. It is not to include internal air films, roof space or roof lining.
- Minimum ceiling Total R-Values are in-situ values. They account for compression of insulation.
Minimum ceiling insulation R-Value from Tables 13.2.3j to 13.2.3r | Minimum Total R-Value to account for thermal bridging – heat flow down | Minimum Total R-Value to account for thermal bridging – heat flow up |
---|---|---|
1.0 | 1.40 | 1.32 |
1.5 | 1.86 | 1.78 |
2.0 | 2.29 | 2.21 |
2.5 | 2.71 | 2.63 |
3.0 | 3.11 | 3.02 |
3.5 | 3.31 | 3.22 |
4.0 | 3.66 | 3.57 |
4.5 | 3.98 | 3.90 |
5.0 | 4.32 | 4.22 |
5.5 | 4.63 | 4.53 |
6.0 | 4.93 | 4.82 |
Table Notes
- Minimum Total R-Values are in-situ values. They account for compression of insulation.
- Direction of heat flow must be determined in accordance with Table 13.2.3v.
Minimum ceiling insulation R-Value from Tables 13.2.3j to 13.2.3r | Option 1 – increase insulation between roof frame members to specified minimum R-Value | Option 2 – add a layer of continuous insulation with specified minimum R-Value above or below the roof frame members |
---|---|---|
1.0 | 1.5 | 0.13 |
1.5 | 2.5 | 0.30 |
2.0 | 3.5 | 0.30 |
2.5 | 5.0 | 0.40 |
3.0 | 6.0 | 0.60 |
3.5 | X | 0.60 |
4.0 | X | 0.60 |
4.5 | X | 0.60 |
5.0 | X | 0.60 |
5.5 | X | 0.60 |
6.0 | X | 0.60 |
Table Notes
- Minimum R-Values are in-situ values. They account for compression of insulation.
- X = not permitted.
Climate zone | Direction of heat flow |
---|---|
1 | Down |
2 (altitude less than 300 m) | Down |
2 (altitude 300 m or more) | Down and up |
3 | Down and up |
4 | Up |
5 | Up |
6 | Up |
7 | Up |
8 | Up |
Percentage of ceiling area uninsulated | Minimum R-Value of ceiling insulation required to satisfy 13.2.3(1) and (3) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | |
0.5 to less than 1.0% | 1.0 | 1.6 | 2.2 | 2.8 | 3.4 | 4.0 | 4.7 | 5.4 | 6.2 | 6.9 |
1.0% to less than 1.5% | 1.1 | 1.7 | 2.3 | 2.9 | 3.6 | 4.4 | 5.2 | 6.1 | 7.0 | x |
1.5% to less than 2.0% | 1.1 | 1.7 | 2.4 | 3.1 | 3.9 | 4.8 | 5.8 | 6.8 | x | x |
2.0% to less than 2.5% | 1.1 | 1.8 | 2.5 | 3.3 | 4.2 | 5.3 | 6.5 | x | x | x |
2.5% to less than 3.0% | 1.2 | 1.9 | 2.6 | 3.6 | 4.6 | 5.9 | x | x | x | x |
3.0% to less than 4.0% | 1.2 | 2.0 | 3.0 | 4.2 | 5.7 | x | x | x | x | x |
4.0% to less than 5.0% | 1.3 | 2.2 | 3.4 | 5.0 | x | x | x | x | x | x |
Table Notes
- Interpolation is allowed for values between those shown.
- X = not permitted.
Climate zone | SA ≤ 0.23 | 0.23 < SA ≤ 0.32 | 0.32 < SA ≤ 0.42 | 0.42 < SA ≤ 0.53 | 0.53 < SA ≤ 0.64 | 0.64 < SA ≤ 0.73 | 0.73 < SA ≤ 0.85 | 0.85 < SA ≤ 0.96 |
---|---|---|---|---|---|---|---|---|
1 (single storey dwelling) | 1.40 | 3.31 | X | X | X | X | X | X |
1 (two or more storey dwelling) | 1.86 | 3.31 | 4.32 | X | X | X | X | X |
2 (heat flow down) | 3.11 | 3.11 | 3.31 | 3.66 | 3.66 | X | X | X |
2 (heat flow up) | 3.02 | 3.02 | 3.22 | 3.57 | 3.57 | X | X | X |
3 (heat flow down) | 3.31 | 3.66 | 4.32 | X | X | X | X | X |
3 (heat flow up) | 3.22 | 3.57 | 4.22 | X | X | X | X | X |
4 | 3.22 | 3.22 | 3.22 | 3.22 | 3.22 | X | X | X |
5 | 3.02 | 3.02 | 3.02 | 3.02 | 3.02 | X | X | X |
6 | 3.57 | 3.57 | 3.57 | 3.57 | 3.57 | 3.57 | 3.57 | 3.57 |
7 | 4.22 | 3.90 | 3.90 | 3.57 | 3.57 | 3.22 | 3.22 | 3.22 |
8 | 3.90 | 3.57 | 3.57 | 3.22 | 3.22 | 3.02 | 3.02 | 3.02 |
Table Notes
- SA = solar absorptance.
- Direction of heat flow must be determined in accordance with Table 13.2.3v.
- X = not permitted.
Explanatory information: Table 13.2.3w
- When considering the reduction of insulation because of exhaust fans, flues or recessed downlights, 0.5% of the ceiling area for a 200 m2 house would permit 2 bathroom heater-light assemblies, a laundry exhaust fan, a kitchen exhaust fan and either approximately 20 recessed down-lights with 50 mm clearance to insulation, 10 recessed downlights with 100 mm clearance to insulation or only 3 recessed downlights with 200 mm clearance to insulation.
- Note that 13.2.3(5) does not require an increase in ceiling insulation for roof lights.
- Placing some of the required insulation at the roof level may result in a more practical outcome. Insulation at the roof level is effective in warm climates and significantly moderates the roof space extremes and condensation risk in cold climates. Note that Part 10.8 contains specific provisions for condensation.
Explanatory information: Thermal bridging calculation methods
The effect of thermal bridging through repeating framing elements such as ceiling joists and the bottom chord of ceiling trusses must be considered when calculating the Total R-Value of metal-framed roofs. Other types of thermal bridges may be calculated if considered significant.
13.2.4
Roof lights
2019: 3.12.1.3
13.2.4
Roof lights
2019: 3.12.1.3
Roof lights
13.2.4 does not apply in NSW.
Roof lights (including any associated shaft and diffuser) serving a habitable room or an interconnecting space such as a corridor, hallway, stairway or the like must have—
- a total area of not more than 5% of the floor area of the room or space served; and
- transparent and translucent elements, including any imperforate ceiling diffuser, with a combined performance of—
- for Total System SHGC, in accordance with Table 13.2.4; and
- for Total System U-Value, not more than U3.9.
Roof light shaft index Note 1 | Total area of roof lights up to 3.5% of the floor area of the room or space | Total area of roof lights more than 3.5% and up to 5% of the floor area of the room or space |
---|---|---|
< 1.0 | ≤ 0.45 | ≤ 0.29 |
≥ 1.0 to < 2.5 | ≤ 0.51 | ≤ 0.33 |
≥ 2.5 | ≤ 0.76 | ≤ 0.49 |
Table Notes
- The roof light shaft index is determined by measuring the distance from the centre of the shaft at the roof to the centre of the shaft at the ceiling level and dividing it by the average internal dimension of the shaft opening at the ceiling level (or the diameter for a circular shaft) in the same units of measurement.
- The area of a roof light is the area of the roof opening that allows light to enter the building. The total area of roof lights is the combined area for all roof lights serving the room or space.
Explanatory information
The Total System SHGC and Total System U-Values are expressed as Australian Fenestration Rating Council (AFRC) values.
13.2.5
External walls
2019: 3.12.1.4
13.2.5
External walls
2019: 3.12.1.4
- does not have a wall lining or has a wall lining that is fixed directly to the metal frame; and
- is clad with weatherboards, fibre-cement or the like, or metal sheeting fixed to the metal frame.
Explanatory information
- A lightweight wall has no high thermal mass cladding on the outside or lining on the inside. Typically, this would represent a framed wall, clad externally with timber weatherboards, fibre-cement sheet, metal or autoclaved aerated concrete.
- Because of the high thermal conductance of metal, a thermal break is needed when a metal framing member directly connects the external cladding to the internal lining or the internal environment. For the purposes of NSW 13.2.5(1)(b), expanded polystyrene strips greater than or equal to 12 mm thickness and timber greater than or equal to 20 mm thickness are deemed to achieve an R-Value greater than or equal to 0.2.
- Continuous insulation placed outside the primary insulation layer, including reflective insulation, may also be subject to vapour permeance requirements of 10.8.1(2). Many continuous insulation products and foils have a low vapour permeance. Some reflective insulation products have perforations to increase their vapour permeance. Many perforated reflective insulation products are not classified as a water barrier by AS 4200.1. Accordingly, these products are not suitable for use as a water control layer.
- Many reflective insulation products that use perforations to increase their vapour permeance are not suitable for use behind vertical or diagonally orientated timber cladding boards, where required by clause 7.5.2 of the ABCB Housing Provisions, or behind open jointed or unsealed cladding systems.
External walls
- in climate zone 1, in accordance with Table 13.2.5a; and
- in climate zone 2, in accordance with Tables 13.2.5c and 13.2.5d as applicable; and
- in climate zone 3, in accordance with Table 13.2.5e; and
- in climate zone 4, in accordance with Tables 13.2.5g and 13.2.5h as applicable; and
- in climate zone 5, in accordance with Tables 13.2.5i and 13.2.5j as applicable; and
- in climate zone 6, in accordance with Tables 13.2.5k and 13.2.5l as applicable; and
- In climate zone 7, in accordance with Tables 13.2.5m and 13.2.5n as applicable.
- in climate zone 1, in accordance with Table 13.2.5b; and
- in climate zone 2, in accordance with Table 13.2.5c, with R0.3 added; and
- in climate zone 3, in accordance with Table 13.2.5f; and
- in climate zone 4, in accordance with Table 13.2.5g, with R0.3 added; and
- in climate zone 5, in accordance with Table 13.2.5i, with R0.3 added; and
- in climate zone 6, in accordance with Table 13.2.5k, with R0.3 added; and
- in climate zone 7, in accordance with Table 13.2.5m, with R0.3 added; and
- in climate zone 8, in accordance with Table 13.2.5o.
- achieving the Total R-Value in Tables 13.2.5p, 13.2.5q and 13.2.5r, calculated in accordance with AS/NZS 4859.2; or
- complying with one of the options in Tables 13.2.5s, 13.2.5t and 13.2.5u.
- does not have a wall lining or has a wall lining that is fixed directly to the metal frame; and
- is clad with weatherboards, fibre-cement or the like, or metal sheeting fixed to the metal frame.
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.3 | 0 | X | X | X | X |
> 0 to ≤ 300 | Reflective | X | X | X | |
> 300 to ≤ 450 | 0.0 | Reflective | 1.5 | X | |
> 450 to ≤ 600 | 0.0 | Reflective | 1.0 | X | |
> 600 to ≤ 900 | 0.0 | 0.0 | Reflective | 2.0 | |
> 900 to ≤ 1200 | 0.0 | 0.0 | Reflective | 1.0 | |
> 1200 to ≤ 1500 | 0.0 | 0.0 | 0.0 | Reflective | |
> 1500 to ≤ 1800 | 0.0 | 0.0 | 0.0 | Reflective | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | 0.0 | Reflective | |
> 0.3 to ≤ 0.4 | 0 | X | X | X | X |
> 0 to ≤ 300 | 1.0 | X | X | X | |
> 300 to ≤ 450 | 1.0 | 1.0 | X | X | |
> 450 to ≤ 600 | Reflective | Reflective | 2.0 | X | |
> 600 to ≤ 900 | 0.0 | Reflective | Reflective | X | |
> 900 to ≤ 1200 | 0.0 | 0.0 | Reflective | 1.5 | |
> 1200 to ≤ 1500 | 0.0 | 0.0 | Reflective | Reflective | |
> 1500 to ≤ 1800 | 0.0 | 0.0 | 0.0 | Reflective | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | 0.0 | Reflective | |
> 0.4 to ≤ 0.5 | 0 | X | X | X | X |
> 0 ≤ 300 | 1.0 | X | X | X | |
> 300 to ≤ 450 | 1.0 | 1.5 | X | X | |
> 450 to ≤ 600 | Reflective | 1.0 | X | X | |
> 600 to ≤ 900 | 0.0 | Reflective | 1.0 | X | |
> 900 to ≤ 1200 | 0.0 | Reflective | Reflective | 2.0 | |
> 1200 to ≤ 1500 | 0.0 | 0.0 | Reflective | 1.0 | |
> 1500 to ≤ 1800 | 0.0 | 0.0 | Reflective | Reflective | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | 0.0 | Reflective | |
> 0.5 to ≤ 0.6 | 0 | X | X | X | X |
> 0 to ≤ 300 | 1.5 | X | X | X | |
> 300 to ≤ 450 | 1.0 | X | X | X | |
> 450 to ≤ 600 | Reflective | 1.5 | X | X | |
> 600 to ≤ 900 | Reflective | Reflective | 1.5 | X | |
> 900 to ≤ 1200 | 0.0 | Reflective | Reflective | X | |
> 1200 to ≤ 1500 | 0.0 | Reflective | Reflective | 1.5 | |
> 1500 to ≤ 1800 | 0.0 | 0.0 | Reflective | 1.0 | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | Reflective | Reflective | |
> 0.6 to ≤ 0.7 | 0 | X | X | X | X |
> 0 to ≤ 300 | X | X | X | X | |
> 300 to ≤ 450 | X | X | X | X | |
> 450 to ≤ 600 | Reflective | 2.0 | X | X | |
> 600 to ≤ 900 | Reflective | 1.0 | 2.0 | X | |
> 900 to ≤ 1200 | Reflective | Reflective | 1.0 | X | |
> 1200 to ≤ 1500 | 0.0 | Reflective | Reflective | 2.0 | |
> 1500 to ≤ 1800 | 0.0 | Reflective | Reflective | 1.0 | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | Reflective | Reflective |
Table Notes
- SA = solar absorptance.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
- Reflective = reflective insulation with an airspace with a minimum width of at least 20 mm. The surface emittance of the reflective surface facing the airspace must be a maximum of 0.1, where the airspace is exposed to the sun during construction to reduce glare (an outward facing surface), or 0.05 if not exposed to the sun (an inward facing surface).
- This table shows wall heights for single storey dwellings. For two storey (or more) dwellings with a wall height up to 2.4 m, add R0.5 to the R-Values given in this Table. For two storey (or more) dwellings with a wall height greater than 2.4 m, add R1.0.
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.3 | 0 | X | X | X | X |
> 0 to ≤ 300 | 2.5 | X | X | X | |
> 300 to ≤ 450 | 1.0 | X | X | X | |
> 450 to ≤ 600 | Reflective | 2.0 | X | X | |
> 600 to ≤ 900 | Reflective | 1.0 | 2.0 | X | |
> 900 to ≤ 1200 | Reflective | Reflective | 1.0 | X | |
> 1200 to ≤ 1500 | Reflective | Reflective | Reflective | 2.5 | |
> 1500 to ≤ 1800 | 0.0 | Reflective | Reflective | 1.5 | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | Reflective | 1.0 | |
> 0.3 to ≤ 0.4 | 0 | X | X | X | X |
> 0 to ≤ 300 | X | X | X | X | |
> 300 to ≤ 450 | 1.0 | X | X | X | |
> 450 to ≤ 600 | Reflective | 2.0 | X | X | |
> 600 to ≤ 900 | Reflective | 1.0 | 2.0 | X | |
> 900 to ≤ 1200 | Reflective | Reflective | 1.0 | X | |
>1200 to ≤ 1500 | Reflective | Reflective | Reflective | 2.5 | |
> 1500 to ≤ 1800 | 0.0 | Reflective | Reflective | 1.5 | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | Reflective | 1.0 | |
> 0.4 to ≤ 0.5 | 0 | X | X | X | X |
> 0 to ≤ 300 | X | X | X | X | |
> 300 to ≤ 450 | 1.0 | X | X | X | |
> 450 to ≤ 600 | Reflective | 2.0 | X | X | |
> 600 to ≤ 900 | Reflective | 1.0 | 2.0 | X | |
> 900 to ≤ 1200 | Reflective | Reflective | 1.0 | X | |
> 1200 to ≤ 1500 | Reflective | Reflective | Reflective | 2.5 | |
> 1500 to ≤ 1800 | 0.0 | Reflective | Reflective | 1.5 | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | Reflective | 1.0 | |
> 0.5 to ≤ 0.6 | 0 | X | X | X | X |
> 0 to ≤ 300 | X | X | X | X | |
> 300 to ≤ 450 | 1.0 | X | X | X | |
> 450 to ≤ 600 | Reflective | 2.0 | X | X | |
> 600 to ≤ 900 | Reflective | 1.0 | 2.0 | X | |
> 900 to ≤ 1200 | Reflective | Reflective | 1.0 | X | |
> 1200 to ≤ 1500 | Reflective | Reflective | Reflective | 2.5 | |
> 1500 to ≤ 1800 | 0.0 | Reflective | Reflective | 1.5 | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | Reflective | 1.0 | |
> 0.6 to ≤ 0.7 | 0 | X | X | X | X |
> 0 to ≤ 300 | X | X | X | X | |
> 300 to ≤ 450 | 1.0 | X | X | X | |
> 450 to ≤ 600 | Reflective | 2.0 | X | X | |
> 600 to ≤ 900 | Reflective | 1.0 | 2.0 | X | |
> 900 to ≤ 1200 | Reflective | Reflective | 1.0 | X | |
> 1200 to ≤ 1500 | Reflective | Reflective | Reflective | 2.5 | |
> 1500 to ≤ 1800 | 0.0 | Reflective | Reflective | 1.5 | |
> 1800 to ≤ 2400 | 0.0 | 0.0 | Reflective | 1.0 |
Table Notes
- SA = solar absorptance.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
- Reflective = reflective insulation with an airspace with a minimum width of at least 20 mm. The surface emittance of the reflective surface facing the airspace must be a maximum of 0.1 where the airspace is exposed to the sun during construction to reduce glare (an outward facing surface), or 0.05 of not exposed to the sun (an inward facing surface).
- This Table shows wall heights for single storey dwellings. For two storey (or more) dwellings with a wall height up to 2.4 m, add R0.5 to R-Values from this Table. For two storey (or more) dwellings with a wall height greater than 2.4 m, add R1.0.
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | X | X | X | X |
> 0 to ≤ 300 | 2.0 | X | X | X | |
> 300 to ≤ 450 | 1.5 | X | X | X | |
> 450 to ≤ 600 | 1.5 | 2.0 | X | X | |
> 600 to ≤ 900 | 1.5 | 1.5 | 2.5 | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 1.5 | X | |
> 1200 to ≤ 1500 | 1.5 | 1.5 | 1.5 | 2.5 | |
> 1500 to ≤ 1800 | 1.5 | 1.5 | 1.5 | 2.0 | |
> 0.35 to ≤ 0.5 | 0 | X | X | X | X |
> 0 to ≤ 300 | 2.0 | X | X | X | |
> 300 to ≤ 450 | 1.5 | X | X | X | |
> 450 to ≤ 600 | 1.5 | 2.5 | X | X | |
> 600 to ≤ 900 | 1.5 | 1.5 | 2.5 | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 1.5 | X | |
> 1200 to ≤ 1500 | 1.5 | 1.5 | 1.5 | 2.5 | |
> 1500 to ≤ 1800 | 1.5 | 1.5 | 1.5 | 2.0 | |
> 0.5 to ≤ 0.7 | 0 | X | X | X | X |
> 0 to ≤ 300 | 2.0 | X | X | X | |
> 300 to ≤ 450 | 1.5 | X | X | X | |
> 450 to ≤ 600 | 1.5 | 2.0 | X | X | |
> 600 to ≤ 900 | 1.5 | 1.5 | 2.5 | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 1.5 | X | |
> 1200 to ≤ 1500 | 1.5 | 1.5 | 1.5 | X | |
> 1500 to ≤ 1800 | 1.5 | 1.5 | 1.5 | 2.0 |
Table Notes
- SA = solar absorptance.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
- This Table shows wall heights for single storey dwellings. For two storey (or more) dwellings with a wall height of up to 2.4 m add R0.4 to the R-Values from this Table. For two storey (or more) dwellings with a wall height greater than 2.4 m, add R0.8.
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 0.25 | 0.25 | 0.25 | 0.51 |
> 0 to ≤ 300 | 0.0 | 0.25 | 0.25 | 0.51 | |
> 300 to ≤ 450 | 0.0 | 0.0 | 0.25 | 0.51 | |
> 450 to ≤ 600 | 0.0 | 0.0 | 0.25 | 0.51 | |
> 600 to ≤ 900 | 0.0 | 0.0 | 0.25 | 0.25 | |
> 900 to ≤ 1200 | 0.0 | 0.25 | 0.25 | 0.25 | |
> 1200 to ≤ 1500 | 0.0 | 0.25 | 0.25 | 0.25 | |
> 1500 to ≤ 1800 | 0.0 | 0.25 | 0.25 | 0.25 | |
> 0.35 to ≤ 0.5 | 0 | 0.25 | 0.25 | 0.25 | 0.51 |
> 0 to ≤ 300 | 0.0 | 0.25 | 0.25 | 0.51 | |
> 300 to ≤ 450 | 0.0 | 0.0 | 0.25 | 0.51 | |
> 450 to ≤ 600 | 0.0 | 0.0 | 0.25 | 0.51 | |
> 600 to ≤ 900 | 0.0 | 0.0 | 0.25 | 0.25 | |
> 900 to ≤ 1200 | 0.0 | 0.0 | 0.0 | 0.25 | |
> 1200 to ≤ 1500 | 0.25 | 0.0 | 0.25 | 0.25 | |
> 1500 to ≤ 1800 | 0.25 | 0.25 | 0.25 | 0.25 | |
> 0.5 to ≤ 0.7 | 0 | 0.25 | 0.25 | 0.51 | 0.51 |
> 0 to ≤ 300 | 0.0 | 0.25 | 0.25 | 0.51 | |
> 300 to ≤ 450 | 0.0 | 0.0 | 0.25 | 0.51 | |
> 450 to ≤ 600 | 0.0 | 0.0 | 0.25 | 0.51 | |
> 600 to ≤ 900 | 0.0 | 0.0 | 0.25 | 0.25 | |
> 900 to ≤ 1200 | 0.0 | 0.0 | 0.0 | 0.25 | |
> 1200 to ≤ 1500 | 0.0 | 0.0 | 0.0 | 0.25 | |
> 1500 to ≤ 1800 | 0.0 | 0.0 | 0.25 | 0.25 |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.3 | 0 | X | X | X | X |
> 0 to ≤ 300 | 2.5 | X | X | X | |
> 300 to ≤ 450 | 1.5 | X | X | X | |
> 450 to ≤ 600 | 1.5 | 2.5 | X | X | |
> 600 to ≤ 900 | 1.5 | 1.5 | 2.5 | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 1.5 | X | |
> 1200 to ≤ 1500 | Reflective | 1.5 | 1.5 | 2.5 | |
> 1500 to ≤ 1800 | Reflective | 1.5 | 1.5 | 2.0 | |
> 1800 to ≤ 2400 | Reflective | Reflective | 1.5 | 1.5 | |
> 0.3 to ≤ 0.4 | 0 | X | X | X | X |
> 0 to ≤ 300 | 2.5 | X | X | X | |
> 300 to ≤ 450 | 2.0 | X | X | X | |
> 450 to ≤ 600 | 1.5 | 2.5 | X | X | |
> 600 to ≤ 900 | 1.5 | 1.5 | 2.5 | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 2.0 | X | |
> 1200 to ≤ 1500 | Reflective | 1.5 | 1.5 | 2.7 | |
> 1500 to ≤ 1800 | Reflective | 1.5 | 1.5 | 2.0 | |
> 1800 to ≤ 2400 | Reflective | Reflective | 1.5 | 1.5 | |
> 0.4 to ≤ 0.5 | 0 | X | X | X | X |
> 0 to ≤ 300 | X | X | X | X | |
> 300 to ≤ 450 | 2.0 | X | X | X | |
> 450 to ≤ 600 | 1.5 | X | X | X | |
> 600 to ≤ 900 | 1.5 | 2.0 | 2.7 | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 2.0 | X | |
> 1200 to ≤ 1500 | 1.5 | 1.5 | 1.5 | X | |
> 1500 to ≤ 1800 | Reflective | 1.5 | 1.5 | 2.5 | |
> 1800 to ≤ 2400 | Reflective | Reflective | 1.5 | 1.5 | |
> 0.5 to ≤ 0.6 | 0 | X | X | X | X |
> to ≤ 300 | X | X | X | x | |
> 300 to ≤ 450 | 2.0 | X | X | X | |
> 450 to ≤ 600 | 1.5 | X | X | X | |
> 600 to ≤ 900 | 1.5 | 2.0 | X | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 2.0 | X | |
> 1200 to ≤ 1500 | 1.5 | 1.5 | 1.5 | X | |
> 1500 to ≤ 1800 | 1.5 | 1.5 | 1.5 | 2.5 | |
> 1800 to ≤ 2400 | Reflective | 1.5 | 1.5 | 2.0 | |
> 0.6 to ≤ 0.7 | 0 | X | X | X | X |
> 0 to ≤ 300 | X | X | X | X | |
> 300 to ≤ 450 | 2.5 | X | X | X | |
> 450 to ≤ 600 | 2.0 | X | X | X | |
> 600 to ≤ 900 | 1.5 | 2.0 | X | X | |
> 900 to ≤ 1200 | 1.5 | 1.5 | 2.5 | X | |
> 1200 to ≤ 1500 | 1.5 | 1.5 | 2.0 | X | |
> 1500 to ≤ 1800 | Reflective | 1.5 | 1.5 | 2.7 | |
> 1800 to ≤ 2400 | Reflective | 1.5 | 1.5 | 2.0 |
Table Notes
- SA = solar absorptance.
- R-Values listed are for the labelled, declared R-Value for insulation.
- X = not permitted.
- Reflective = reflective insulation with an airspace with a minimum width of at least 20 mm. The surface emittance of the reflective surface facing the airspace must be a maximum 0.1, where the airspace is exposed to the sun during construction to reduce glare (an outward facing surface), or 0.05 if not exposed to the sun (an inward facing surface).
- This Table shows wall heights for single storey dwellings. For two storey (or more) dwellings with a wall height up to 2.4 m, add R1.0 to the R-Values given in this Table. For two storey (or more) dwellings with a wall height greater than 2.4 m, add R1.5.
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 2.0 | 2.5 | 2.5 | X |
> 0 to ≤ 300 | 2.0 | 2.0 | 2.5 | X | |
> 300 to ≤ 450 | 2.0 | 2.0 | 2.5 | 3.0 | |
> 450 to ≤ 600 | 2.0 | 2.5 | 2.5 | 3.0 | |
> 600 to ≤ 900 | 2.5 | 2.5 | 2.5 | 3.0 | |
> 900 to ≤ 1200 | X | 3.0 | 3.0 | 3.0 | |
> 1200 to ≤ 1500 | X | X | 3.0 | X | |
> 0.35 to ≤ 0.5 | 0 | 2.0 | 2.5 | 2.5 | X |
> 0 to ≤ 300 | 2.0 | 2.0 | 2.5 | X | |
> 300 to ≤ 450 | 2.0 | 2.0 | 2.5 | 3.0 | |
> 450 to ≤ 600 | 2.0 | 2.0 | 2.5 | 3.0 | |
> 600 to ≤ 900 | 2.5 | 2.5 | 2.5 | 3.0 | |
> 900 to ≤ 1200 | X | 2.5 | 2.5 | 3.0 | |
> 1200 to ≤ 1500 | X | X | 3.0 | 3.0 | |
> 0.5 to ≤ 0.7 | 0 | 2.0 | 2.5 | 2.5 | X |
> 0 to ≤ 300 | 2.0 | 2.0 | 2.5 | X | |
> 300 to ≤ 450 | 2.0 | 2.0 | 2.5 | 3.0 | |
> 450 to ≤ 600 | 2.0 | 2.0 | 2.5 | 3.0 | |
> 600 to ≤ 900 | 2.0 | 2.0 | 2.5 | 3.0 | |
> 900 to ≤ 1200 | 3.0 | 2.5 | 2.5 | 3.0 | |
> 1200 to ≤ 1500 | X | 3.0 | 2.5 | 3.0 |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 0.25 | 0.25 | 0.51 | 0.75 |
> 0 to ≤ 300 | 0.51 | 0.51 | 0.51 | 0.75 | |
> 300 to ≤ 450 | 0.51 | 0.51 | 0,51 | 0.75 | |
> 450 to ≤ 600 | 0.51 | 0.51 | 0.51 | 0.75 | |
> 600 to ≤ 900 | 1.08 | 0.75 | 0.75 | 1.08 | |
> 900 to ≤ 1200 | 1.44 | 1.08 | 1.08 | 1.08 | |
> 1200 to ≤ 1500 | X | 1.44 | 1.44 | 1.08 | |
> 1500 to ≤ 1800 | X | X | X | 1.44 | |
> 0.35 to ≤ 0.5 | 0 | 0.25 | 0.25 | 0.51 | 0.62 |
> 0 to ≤ 300 | 0.25 | 0.25 | 0.51 | 0.62 | |
> 300 to ≤ 450 | 0.51 | 0.51 | 0.51 | 0.62 | |
> 450 to ≤ 600 | 0.51 | 0.51 | 0.51 | 0.75 | |
> 600 to ≤ 900 | 0.75 | 0.62 | 0.62 | 0.75 | |
> 900 to ≤ 1200 | 1.08 | 1.08 | 0.75 | 1.08 | |
> 1200 to ≤ 1500 | X | 1.44 | 1.08 | 1.08 | |
> 1500 to ≤ 1800 | X | X | 1.44 | 1.44 | |
> 0.5 to ≤ 0.7 | 0 | 0.0 | 0.25 | 0.25 | 0.51 |
> 0 to ≤ 300 | 0.25 | 0.25 | 0.25 | 0.51 | |
> 300 to ≤ 450 | 0.25 | 0.25 | 0.51 | 0.51 | |
> 450 to ≤ 600 | 0.25 | 0.25 | 0.51 | 0.51 | |
> 600 to ≤ 900 | 0.25 | 0.51 | 0.51 | 0.62 | |
> 900 to ≤ 1200 | 0.51 | 0.62 | 0.62 | 0.75 | |
> 1200 to ≤ 1500 | 1.08 | 1.08 | 1.08 | 1.08 | |
> 1500 to ≤ 1800 | 1.44 | 1.44 | 1.08 | 1.08 |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 1.5 | 2.0 | 2.0 | 2.5 |
> 0 to ≤ 300 | 1.5 | 2.0 | 2.0 | 2.5 | |
> 300 to ≤ 450 | 1.5 | 1.5 | 2.0 | 2.5 | |
> 450 to ≤ 600 | 1.5 | 2.0 | 2.0 | 2.5 | |
> 600 to ≤ 900 | 2.0 | 2.0 | 2.0 | 2.5 | |
> 900 to ≤ 1200 | 3.0 | 2.0 | 2.0 | 2.5 | |
> 1200 to ≤ 1500 | X | 3.0 | 2.5 | 2.5 | |
> 0.35 to ≤ 0.5 | 0 | 1.5 | 2.0 | 2.0 | 2.5 |
> 0 to ≤ 300 | 1.5 | 1.5 | 2.0 | 2.5 | |
> 300 to ≤ 450 | 1.5 | 1.5 | 2.0 | 2.5 | |
> 450 to ≤ 600 | 1.5 | 1.5 | 2.0 | 2.5 | |
> 600 to ≤ 900 | 2.0 | 2.0 | 2.0 | 2.5 | |
> 900 to ≤ 1200 | 2.5 | 2.0 | 2.0 | 2.5 | |
> 1200 to ≤ 1500 | 3.0 | 2.5 | 2.5 | 2.5 | |
> 0.5 to ≤ 0.7 | 0 | 1.5 | 2.0 | 2.0 | 3.0 |
> 0 to ≤ 300 | 1.5 | 2.0 | 2.0 | 3.0 | |
> 300 to ≤ 450 | 1.5 | 1.5 | 2.0 | 2.5 | |
> 450 to ≤ 600 | 1.5 | 2.0 | 2.0 | 2.5 | |
> 600 to ≤ 900 | 2.0 | 2.0 | 2.0 | 2.5 | |
> 900 to ≤ 1200 | 2.5 | 2.0 | 2.0 | 2.5 | |
> 1200 to ≤ 1500 | X | 3.0 | 2.5 | 2.5 |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 0.0 | 0.0 | 0.25 | 0.25 |
> 0 to ≤ 300 | 0.0 | 0.25 | 0.25 | 0.25 | |
> 300 to ≤ 450 | 0.25 | 0.25 | 0.25 | 0.25 | |
> 450 to ≤ 600 | 0.25 | 0.25 | 0.25 | 0.25 | |
> 600 to ≤ 900 | 0.25 | 0.25 | 0.25 | 0.51 | |
> 900 to ≤ 1200 | 0.51 | 0.51 | 0.51 | 0.51 | |
> 1200 to ≤ 1500 | 0.62 | 0.51 | 0.51 | 0.51 | |
> 0.35 to ≤ 0.5 | 0 | 0.0 | 0.0 | 0.25 | 0.25 |
> 0 to ≤ 300 | 0.0 | 0.0 | 0.25 | 0.25 | |
> 300 to ≤ 450 | 0.0 | 0.25 | 0.25 | 0.25 | |
> 450 to ≤ 600 | 0.25 | 0.25 | 0.25 | 0.25 | |
> 600 to ≤ 900 | 0.25 | 0.25 | 0.25 | 0.25 | |
> 900 to ≤ 1200 | 0.51 | 0.25 | 0.25 | 0.51 | |
> 1200 to ≤ 1500 | 0.62 | 0.51 | 0.51 | 0.51 | |
> 0.5 to ≤ 0.7 | 0 | 0.0 | 0.0 | 0.0 | 0.25 |
> 0 to ≤ 300 | 0.0 | 0.0 | 0.25 | 0.25 | |
> 300 to ≤ 450 | 0.0 | 0.0 | 0.25 | 0.25 | |
> 450 to ≤ 600 | 0.25 | 0.25 | 0.25 | 0.25 | |
> 600 to ≤ 900 | 0.25 | 0.25 | 0.25 | 0.25 | |
> 900 to ≤ 1200 | 0.51 | 0.25 | 0.25 | 0.25 | |
> 1200 to ≤ 1500 | 0.51 | 0.51 | 0.51 | 0.51 |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 2.0 | 2.4 | X | X |
> 0 to ≤ 300 | 2.4 | 2.4 | X | X | |
> 300 to ≤ 450 | 2.5 | X | X | X | |
> 450 to ≤ 600 | X | X | X | X | |
> 600 to ≤ 900 | X | X | X | X | |
> 0.35 to ≤ 0.5 | 0 | 2.0 | 2.4 | 2.5 | X |
> 0 to ≤ 300 | 2.4 | 2.5 | X | X | |
> 300 to ≤ 450 | 2.4 | X | X | X | |
> 450 to ≤ 600 | X | X | X | X | |
> 600 to ≤ 900 | X | X | X | X | |
> 0.5 to ≤ 0.7 | 0 | 2.0 | 2.0 | 2.4 | X |
> 0 to ≤ 300 | 2.0 | 2.4 | 2.5 | X | |
> 300 to ≤ 450 | 2.4 | 2.4 | 2.5 | X | |
> 450 to ≤ 600 | 2.5 | 2.5 | X | X | |
> 600 to ≤ 900 | X | X | X | X | |
> 0.7 to ≤ 0.85 | 0 | 1.5 | 2.0 | 2.4 | X |
> 0 to ≤ 300 | 2.0 | 2.0 | 2.4 | X | |
> 300 to ≤ 450 | 2.4 | 2.4 | 2.4 | X | |
> 450 to ≤ 600 | 2.4 | 2.4 | 2.4 | X | |
> 600 to ≤ 900 | X | X | X | X |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 0.51 | 0.62 | 1.08 | 1.44 |
> 0 to ≤ 300 | 1.08 | 1.08 | 1.08 | 1.44 | |
> 300 to ≤ 450 | 1.44 | 1.08 | 1.08 | 1.44 | |
> 450 to ≤ 600 | 1.44 | 1.44 | 1.08 | 1.44 | |
> 600 to ≤ 900 | X | X | 1.44 | X | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.35 to ≤ 0.5 | 0 | 0.51 | 0.62 | 0.75 | 1.08 |
> 0 to ≤ 300 | 0.75 | 0.75 | 1.08 | 1.44 | |
> 300 to ≤ 450 | 1.08 | 1.08 | 1.08 | 1.44 | |
> 450 to ≤ 600 | 1.44 | 1.08 | 1.08 | 1.44 | |
> 600 to ≤ 900 | X | X | 1.44 | 1.44 | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.5 to ≤ 0.7 | 0 | 0.25 | 0.51 | 0.62 | 1.08 |
> 0 to ≤ 300 | 0.62 | 0.62 | 0.75 | 1.08 | |
> 300 to ≤ 450 | 1.08 | 0.75 | 1.08 | 1.08 | |
> 450 to ≤ 600 | 1.44 | 1.08 | 1.08 | 1.08 | |
> 600 to ≤ 900 | X | 1.44 | 1.44 | 1.44 | |
> 900 to ≤ 1200 | X | X | X | 1.44 | |
> 0.7 to ≤ 0.85 | 0 | 0.25 | 0.51 | 0.51 | 1.08 |
> 0 to ≤ 300 | 0.62 | 0.51 | 0.75 | 1.08 | |
> 300 to ≤ 450 | 1.08 | 0.62 | 0.75 | 1.08 | |
> 450 to ≤ 600 | 1.08 | 1.08 | 1.08 | 1.08 | |
> 600 to ≤ 900 | X | 1.44 | 1.08 | 1.44 | |
> 900 to ≤ 1200 | X | X | 1.44 | 1.44 |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 1.5 | 1.5 | 1.5 | 2.4 |
> 0 to ≤ 300 | 2.0 | 1.5 | 2.0 | 2.4 | |
> 300 to ≤ 450 | 2.4 | 2.0 | 2.0 | 2.4 | |
> 450 to ≤ 600 | X | 2.4 | 2.0 | 2.4 | |
> 600 to ≤ 900 | X | X | X | X | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.35 to ≤ 0.5 | 0 | 1.5 | 1.5 | 1.5 | 2.0 |
> 0 to ≤ 300 | 1.5 | 1.5 | 2.0 | 2.4 | |
> 300 to ≤ 450 | 2.4 | 2.0 | 2.0 | 2.4 | |
> 450 to ≤ 600 | X | 2.0 | 2.0 | 2.4 | |
> 600 to ≤ 900 | X | X | 2.5 | 2.4 | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.5 to ≤ 0.7 | 0 | 1.5 | 1.5 | 1.5 | 2.0 |
> 0 to ≤ 300 | 1.5 | 1.5 | 1.5 | 2.0 | |
> 300 to ≤ 450 | 2.0 | 1.5 | 1.5 | 2.0 | |
> 450 to ≤ 600 | 2.5 | 2.0 | 2.0 | 2.0 | |
> 600 to ≤ 900 | X | X | 2.4 | 2.4 | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.7 to ≤ 0.85 | 0 | 1.5 | 1.5 | 1.5 | 1.5 |
> 0 to ≤ 300 | 1.5 | 1.5 | 1.5 | 2.0 | |
> 300 to ≤ 450 | 2.0 | 1.5 | 1.5 | 2.0 | |
> 450 to ≤ 600 | 2.4 | 2.0 | 2.0 | 2.0 | |
> 600 to ≤ 900 | X | X | 2.4 | 2.0 | |
> 900 to ≤ 1200 | X | X | X | 2.4 |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 1.08 | 1.44 | X | X |
> 0.35 to ≤ 0.5 | 0 | 1.08 | 1.44 | X | X |
> 0.5 to ≤ 0.7 | 0 | 0.75 | 1.44 | 1.44 | X |
> 0 to ≤ 300 | 1.44 | X | X | X | |
> 0.7 to ≤ 0.85 | 0 | 0.75 | 1.08 | 1.44 | X |
> 0 to ≤ 300 | 1.44 | 1.44 | X | X |
SA | Overhang (mm) | Wall height (m) | |||
---|---|---|---|---|---|
≤ 2.4 | > 2.4 to ≤ 2.7 | > 2.7 to ≤ 3.0 | > 3.0 to ≤ 3.6 | ||
≤ 0.35 | 0 | 1.5 | 2.0 | 2.0 | X |
> 0 to ≤ 300 | 2.0 | 2.0 | 2.4 | X | |
> 300 to ≤ 450 | X | 2.4 | 2.4 | X | |
> 450 to ≤ 600 | X | X | 2.5 | X | |
> 600 to ≤ 900 | X | X | X | X | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.35 to ≤ 0.5 | 0 | 1.5 | 1.5 | 2.0 | 2.4 |
> 0 to ≤ 300 | 2.0 | 2.0 | 2.0 | 2.5 | |
> 300 to ≤ 450 | 2.5 | 2.0 | 2.4 | 2.5 | |
> 450 to ≤ 600 | X | 2.5 | 2.4 | X | |
> 600 to ≤ 900 | X | X | X | X | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.5 to ≤ 0.7 | 0 | 1.5 | 1.5 | 2.0 | 2.7 |
> 0 to ≤ 300 | 2.0 | 2.0 | 2.0 | 2.7 | |
> 300 to ≤ 450 | 2.7 | 2.0 | 2.0 | 2.7 | |
> 450 to ≤ 600 | X | 2.7 | 2.5 | 2.5 | |
> 600 to ≤ 900 | X | X | X | X | |
> 900 to ≤ 1200 | X | X | X | X | |
> 0.7 to ≤ 0.85 | 0 | 1.5 | 1.5 | 1.5 | 2.0 |
> 0 to ≤ 300 | 2.0 | 1.5 | 2.0 | 2.4 | |
> 300 to ≤ 450 | 2.4 | 2.0 | 2.0 | 2.4 | |
> 450 to ≤ 600 | X | 2.4 | 2.0 | 2.4 | |
> 600 to ≤ 900 | X | X | X | X | |
> 900 to ≤ 1200 | X | X | X | X |
Table Notes
- SA = solar absorptance.
- R-Values listed are for the labelled, declared R-Value of insulation.
- X = not permitted.
- This Table shows wall heights for single storey dwellings. For two storey (or more) dwellings with a wall height up to 2.4 m, add R0.5 to the R-Values given in this Table. For two storey (or more) dwellings with a wall height greater than 2.4 m, add R1.0. In both cases, the maximum insulation level must be not more than R2.7, or R3.1 if there is a reflective airspace.
Wall insulation R-Value from Tables 13.2.5a and 13.2.5e | Minimum Total R-Value to account for thermal bridging |
---|---|
0.5 | 0.94 |
1.0 | 1.15 |
1.5 | 1.66 |
2.0 | 2.04 |
2.5 | 2.24 |
2.8 | 2.38 |
3.0 | 2.48 |
Table Notes
Minimum Total R-Values are in-situ values. They account for compression of insulation.
Wall insulation R-Value required in accordance with 13.2.5(2) | Minimum Total R-Value to account for thermal bridging |
---|---|
1.0 | 1.32 |
1.5 | 1.64 |
2.0 | 1.89 |
2.5 | 2.06 |
2.7 | 2.15 |
≥3.0 | 2.27 |
Table Notes
- Where the wall insulation R-Value from Tables 13.2.5b, 13.2.5c, 13.2.5d, 13.2.5e, 13.2.5f, 13.2.5g, 13.2.5h, 13.2.5i, 13.2.5j, 13.2.5k, 13.2.5l, 13.2.5m, 13.2.5n and 13.2.5o falls between the values shown in this Table, the required Total R-Value may be interpolated.
- Minimum Total R-Values are in-situ values. They account for compression of insulation.
Wall insulation from Tables 13.2.5c, 13.2.5g, 13.2.5i, 13.2.5k and 13.2.5m | Minimum Total R-Value to account for thermal bridging |
---|---|
1.5 | 1.79 |
2.0 | 2.08 |
2.5 | 2.34 |
2.7 | 2.44 |
≥3.0 | 2.57 |
Table Notes
Minimum Total R-Values are in-situ values. They account for compression of insulation.
Wall insulation R-Values from Tables 13.2.5a to 13.2.5e | Option 1 – increase insulation between wall framing to specified minimum R-Value | Option 2 – add a layer of continuous insulation with specified minimum R-Value on the inside or outside of the wall framing |
---|---|---|
0 or reflective | Not required | Not required |
0.5 or 1.0 | 1.5 | 0.13 |
1.5, 2.0 or 2.5 | X | 0.30 |
Table Notes
- X = not permitted.
- Minimum R-Values are in-situ values. They account for compression of insulation.
Wall insulation R-Value from Tables 13.2.5a to 13.2.5o | Thermal bridging mitigation |
---|---|
0 or reflective | Not required |
>0 to ≤1.5 | Either install reflective insulation outside the frame to create a minimum 20 mm reflective airspace between frame and cladding, or increase insulation between frames by R0.5. |
>1.5 | Either install reflective insulation outside the frame to create a minimum 20 mm reflective airspace between frame and cladding, or add a layer of continuous insulation with an R-Value of at least R0.30 on the inside or the outside of the frame. |
Table Notes
- Minimum R-Values are in-situ values. They account for compression of insulation.
- The surface emittance of a reflective surface facing an airspace must be a maximum of 0.1.
Wall insulation R-Value from Tables 13.2.5c, 13.2.5g, 13.2.5i, 13.2.5k and 13.2.5m | Thermal bridging mitigation options |
---|---|
> 0 | Either install reflective insulation outside the frame to a minimum 20 mm reflective airspace between the frame and veneer, or add a layer of continuous insulation with an R-Value of at least R0.30 on the inside or the outside of the frame. |
Table Notes
- Minimum R-Values are in-situ values. They account for compression of insulation.
- The surface emittance of a reflective surface facing an airspace must be a maximum of 0.1.
Explanatory information
- A lightweight wall has no high thermal mass cladding on the outside or lining on the inside. Typically, this would represent a framed wall, clad externally with timber weatherboards, fibre-cement sheet, metal or autoclaved aerated concrete.
- Because of the high thermal conductance of metal, a thermal break is needed when a metal framing member directly connects the external cladding to the internal lining or the internal environment. For the purposes of 13.2.5(5)(b), expanded polystyrene strips greater than or equal to 12 mm thickness and timber greater than or equal to 20 mm thickness are deemed to achieve an R-Value greater than or equal to 0.2.
- Continuous insulation placed outside the primary insulation layer, including reflective insulation, may also be subject to vapour permeance requirements of 10.8.1(2). Many continuous insulation products and foils have a low vapour permeance. Some reflective insulation products have perforations to increase their vapour permeance. Many perforated reflective insulation products are not classified as a water barrier by AS 4200.1. Accordingly, these products are not suitable for use as a water control layer.
- Many reflective insulation products that use perforations to increase their vapour permeance are not suitable for use behind vertical or diagonally orientated timber cladding boards, where required by clause 7.5.2 of the ABCB Housing Provisions, or behind open jointed or unsealed cladding systems.
13.2.6
Floors and subfloor walls
2019: 3.12.1.5
13.2.6
Floors and subfloor walls
2019: 3.12.1.5
- be water resistant; and
- be continuous from the adjacent finished ground level—
- to a depth of greater than or equal to 300 mm; or
- for at least the full depth of the vertical edge of the concrete slab-on-ground (see Figure 13.2.6).
Explanatory information
- NSW 13.2.6(3) provides an exemption for an in-screed heating or cooling system used solely in bathrooms, amenity areas and the like, as these are typically small areas.
- Care should be taken to ensure that the type of termite management system selected is compatible with the slab edge insulation.
Floors and subfloor walls
- in climate zone 1, be subfloor wall insulation with an R-Value of R1.5; and
- in climate zone 2, be subfloor wall insulation in accordance with Table 13.2.6b; and
- in climate zone 3, be subfloor wall insulation in accordance with Table 13.2.6c; and
- in climate zone 4, be in accordance with Table 13.2.6d; and
- in climate zone 5, be in accordance with Table 13.2.6e; and
- in climate zone 6, be in accordance with Table 13.2.6f; and
- in climate zone 7, be in accordance with Table 13.2.6g; and
- in climate zone 8, be in accordance with Table 13.2.6h.
- achieving the Total R-Value in Table 13.2.6i, calculated by—
- using a method that accounts for the effect of thermal bridging in a suspended floor above an enclosed subfloor space; or
- using AS/NZS 4859.2 for all other floors; or
- complying with one of the options in Table 13.2.6j.
- in climate zones 6 and 7—
- in climate zone 8—
- be water resistant; and
- be continuous from the adjacent finished ground level—
- to a depth of greater than or equal to 300 mm; or
- for at least the full depth of the vertical edge of the concrete slab-on-ground (see Figure 13.2.6).
Climate zone | R-Value |
---|---|
1 | 2.0 |
2 | 2.0 |
3 | 1.5 |
4 | X |
5 | X |
6 | 4.0, or 3.5 if used in conjunction with a reflective airspace |
7 | |
8 |
Subfloor wall height (mm) | Minimum subfloor wall insulation R-Value |
---|---|
≤600 | 0.5 |
>600 to ≤900 | 1.0 |
>900 to ≤1200 | 1.5 |
>1200 to ≤1500 | 1.5 |
>1500 to ≤1800 | 1.5 |
Table Notes
- Under-floor insulation is not permitted in climate zone 2.
- R-Values listed are for the labelled, declared R-Value of insulation.
- Subfloor wall insulation must not obstruct ventilation openings in the subfloor walls.
Subfloor wall height (mm) | Minimum subfloor wall insulation R-Value |
---|---|
≤600 | 0.5 |
>600 to ≤900 | 0.5 |
>900 to ≤1200 | 0.5 |
>1200 to ≤1500 | 0.5 |
>1500 to ≤1800 | 0.5 |
Table Notes
- Under-floor insulation is not permitted in climate zone 3.
- R-Values listed are for the labelled, declared R-Value of insulation.
- Subfloor wall insulation must not obstruct any ventilation openings in subfloor walls.
Subfloor wall height (mm) | Reflective insulation facing down over the subfloor space | Minimum subfloor wall insulation R-Value | Minimum suspended floor insulation R-Value |
---|---|---|---|
≤600 | No | 0.5 | 1.0 |
≤600 | No | 1.0 | 0.5 |
≤600 | Yes | 0.0 | 1.5 |
≤600 | Yes | 0.5 | 1.0 |
≤600 | Yes | 2.0 | 0.5 |
>600 to ≤900 | No | 0.0 | 1.5 |
>600 to ≤900 | No | 1.5 | 0.5 |
>600 to ≤900 | Yes | 0.0 | 1.5 |
>600 to ≤900 | Yes | 0.5 | 1.0 |
>900 to ≤1200 | No | 0.0 | 1.5 |
>900 to ≤1200 | No | 0.5 | 1.0 |
>900 to ≤1200 | Yes | 0.5 | 1.0 |
>900 to ≤1200 | Yes | 2.0 | 0.5 |
>1200 to ≤1500 | No | 0.0 | 1.5 |
>1200 to ≤1500 | Yes | 0.0 | 1.5 |
>1200 to ≤1500 | Yes | 0.5 | 1.0 |
>1500 to ≤1800 | No | 0.5 | 1.5 |
>1500 to ≤1800 | No | 1.0 | 1.0 |
>1500 to ≤1800 | Yes | 0.0 | 2.0 |
Subfloor wall height (mm) | Reflective insulation facing down over the subfloor surface | Minimum subfloor wall insulation R-Value | Minimum suspended floor insulation R-Value |
---|---|---|---|
≤600 | No | 0.0 | 1.5 |
≤600 | Yes | 0.0 | 2.0 |
>600 to ≤900 | No | 0.0 | 1.5 |
>600 to ≤900 | Yes | 0.0 | 2.0 |
>900 to ≤1200 | No | 0.0 | 2.0 |
>900 to ≤1200 | Yes | 0.0 | 2.0 |
>1200 to ≤1500 | No | 0.0 | 2.0 |
>1200 to ≤1500 | Yes | 0.0 | 2.0 |
>1500 to ≤1800 | No | 0.0 | 2.5 |
>1500 to ≤1800 | No | 0.5 | 2.0 |
>1500 to ≤1800 | Yes | 0.0 | 2.5 |
>1500 to ≤1800 | Yes | 0.5 | 2.0 |
Subfloor wall height (mm) | Reflective insulation facing down over the subfloor area | Minimum subfloor wall insulation R-Value | Minimum suspended floor insulation R-Value |
---|---|---|---|
≤600 | No | 0.0 | 2.0 |
≤600 | Yes | 0.0 | 1.5 |
>600 to ≤900 | No | 0.0 | 2.0 |
>600 to ≤900 | Yes | 0.0 | 1.5 |
>900 to ≤1200 | No | 0.0 | 2.0 |
>900 to ≤1200 | Yes | 0.0 | 1.5 |
>1200 to ≤1500 | No | 0.0 | 2.5 |
>1200 to ≤1500 | No | 0.5 | 2.0 |
>1200 to ≤1500 | Yes | 0.0 | 1.5 |
>1500 to ≤1800 | No | 0.0 | 2.5 |
>1500 to ≤1800 | Yes | 0.0 | 2.0 |
>1500 to ≤1800 | Yes | 0.5 | 1.5 |
Subfloor wall height (mm) | Reflective insulation facing down over the subfloor space | Minimum subfloor wall insulation R-Value | Minimum suspended floor insulation R-Value |
---|---|---|---|
≤600 | No | 0.0 | 2.5 |
≤600 | Yes | 0.0 | 1.5 |
>600 to ≤900 | No | 0.0 | 2.5 |
>600 to ≤900 | Yes | 0.0 | 1.5 |
>900 to ≤1200 | No | 0.0 | 3.0 |
>900 to ≤1200 | Yes | 0.0 | 1.5 |
>1200 to ≤1500 | No | 0.0 | 3.0 |
>1200 to ≤1500 | Yes | 0.0 | 1.5 |
>1500 to ≤1800 | No | 0.0 | 3.0 |
>1500 to ≤1800 | Yes | 1.0 | 1.5 |
>1500 to ≤1800 | Yes | 0.0 | 2.0 |
Subfloor wall height (mm) | Reflective insulation facing down over the subfloor space | Minimum subfloor wall insulation R-Value | Minimum suspended floor insulation R-Value |
---|---|---|---|
≤600 | No | 0.0 | 2.5 |
≤600 | Yes | 0.0 | 1.5 |
>600 to ≤900 | No | 0.0 | 2.5 |
>600 to ≤900 | Yes | 0.0 | 1.5 |
>900 to ≤1200 | No | 0.0 | 3.0 |
>900 to ≤1200 | Yes | 0.0 | 1.5 |
>1200 to ≤1500 | No | 0.0 | 3.0 |
>1200 to ≤1500 | Yes | 0.0 | 1.5 |
>1500 to ≤1800 | No | 0.0 | 3.0 |
>1500 to ≤1800 | Yes | 1.0 | 1.5 |
>1500 to ≤1800 | Yes | 0.0 | 2.0 |
Floor insulation from Tables 13.2.6a and 13.2.6d to 13.2.6h as applicable | Floor covering | Minimum Total R-Value of floor |
---|---|---|
0.0 | Carpet | 0.36 |
0.0 | Other | 0.22 |
0.5 | Carpet | 0.86 |
0.5 | Other | 0.71 |
1.0 | Carpet | 1.30 |
1.0 | Other | 1.15 |
1.5 | Carpet | 1.65 |
1.5 | Other | 1.50 |
2.0 | Carpet | 1.97 |
2.0 | Other | 1.83 |
2.5 | Carpet | 2.27 |
2.5 | Other | 2.11 |
3.0 | Carpet | 2.52 |
3.0 | Other | 2.37 |
3.5 | Carpet | 2.59 |
3.5 | Other | 2.47 |
4.0 | Carpet | 2.79 |
4.0 | Other | 2.65 |
Table Notes
- The Total R-Value can be adjusted using area weightings where there is a combination of floor coverings. Invert the Total R-Value for each floor type before applying area weightings.
- The Total R-Value for the floor plane only includes the floor frame, insulation, flooring and floor coverings. It does not include the internal air film, subfloor airspace, subfloor walls or external air film.
- Minimum Total R-Values are in-situ values. They account for compression of insulation.
- Direction of heat flow must be determined in accordance with Table 13.2.6k.
Floor insulation from Tables 13.2.6a and 13.2.6d to 13.2.6h as applicable | Option 1 – increase insulation between floor framing to specified minimum R-Value | Option 2– add a layer of continuous insulation product above or below the floor framing with specified R-Value |
---|---|---|
0.5 | 1.0 | 0.13 |
1.0 | 1.5 | 0.30 |
1.5 | 2.5 | 0.40 |
2.0 | 3.0 | 0.40 |
2.5 | 4.0 | 0.40 |
≥ 3.0 | X | 0.60 |
Table Notes
- X = not permitted.
- Minimum R-Values are in-situ values. They account for compression of insulation.
Climate zone | Direction of heat flow |
---|---|
1 | Up |
2 | Up |
3 | Up |
4 | Down |
5 | Down |
6 | Down |
7 | Down |
8 | Down |
Explanatory information
- For 13.2.6(3) the effect of thermal bridging through repeating framing elements must be considered when calculating the Total R-Value of metal-framed floors. Other types of thermal bridges may be calculated if considered significant.
- 13.2.6(7) provides an exemption for an in-screed heating or cooling system used solely in bathrooms, amenity areas and the like, as these are typically small areas.
- Care should be taken to ensure that the type of termite management system selected is compatible with the slab edge insulation.
13.2.7
Attached Class 10a buildings
2019: 3.12.1.6
13.2.7
Attached Class 10a buildings
2019: 3.12.1.6
Attached Class 10a buildings
13.2.7 does not apply in NSW.
Explanatory information
The attachment of a Class 10a building, such as a garage, glasshouse, solarium, pool enclosure or the like should not compromise the thermal performance of the Class 1 building. In addition, the Class 10a building may be insulated and so assist the Class 1 building achieve the required thermal performance.
Explanatory Figure 13.2.7 below depicts examples of a Class 1 building with an attached Class 10a garage.