Part J4 Building fabric
NSW J4D1 Deemed-to-Satisfy Provisions2019: J1.0
- NSW J2D2; and
NSW J4D2 Application of Part2019: J1.1, NSW J(A)1.1
NSW J4D3 Thermal construction—general2019: J1.2, NSW J(A)1.2
- abuts or overlaps adjoining insulation other than at supporting members such as studs, noggings, joists, furring channels and the like where the insulation must be 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 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 not less than 50 mm; or
- taped together.
- it maintains its position and thickness, other than where it is compressed between cladding and supporting members, water pipes, electrical cabling or the like; and
- in a ceiling, where there is no bulk insulation or reflective insulation in the wall beneath, it overlaps the wall by not less than 50 mm.
- calculated in accordance with AS/NZS 4859.2 for a roof or floor; or
- determined in accordance with Specification 37 for wall-glazing construction; or
- determined in accordance with Specification 39 or Section 3.5 of CIBSE Guide A for soil or sub-floor spaces.
Notes
Where required is deemed to refer to “Where a development consent specifies that insulation is to be provided as part of the development.”.
NSW J4D6 Walls and glazing2019: J1.5
- for a Class 5, 6, 7, 8 or 9b building or a Class 9a building other than a ward area, U2.0; and
- for a Class 3 or 9c building or a Class 9a ward area—
- in climate zones 1, 3, 4, 6 or 7, U1.1; or
- in climate zones 2 or 5, U2.0; or
- in climate zone 8, U0.9.
- where the wall is less than 80% of the area of the wall-glazing construction, R1.0; or
- where the wall is 80% or more of the area of the wall-glazing construction, the value specified in NSW Table J4D6a.
- for a Class 5, 6, 7, 8 or 9b building or a Class 9a building other than a ward area, the values specified in NSW Table J4D6b; and
- for a Class 3 or 9c building or a Class 9a ward area, the values specified in NSW Table J4D6c.
Climate zone | Class 5, 6, 7, 8 or 9b building or a Class 9a building other than a ward area | Class 3 or 9c building or Class 9a ward area |
---|---|---|
1 | 2.4 | 3.3 |
2 | 1.4 | 1.4 |
3 | 1.4 | 3.3 |
4 | 1.4 | 2.8 |
5 | 1.4 | 1.4 |
6 | 1.4 | 2.8 |
7 | 1.4 | 2.8 |
8 | 1.4 | 3.8 |
Climate zone | Eastern aspect solar admittance | Northern aspect solar admittance | Southern aspect solar admittance | Western aspect solar admittance |
---|---|---|---|---|
1 | 0.12 | 0.12 | 0.12 | 0.12 |
2 | 0.13 | 0.13 | 0.13 | 0.13 |
3 | 0.16 | 0.16 | 0.16 | 0.16 |
4 | 0.13 | 0.13 | 0.13 | 0.13 |
5 | 0.13 | 0.13 | 0.13 | 0.13 |
6 | 0.13 | 0.13 | 0.13 | 0.13 |
7 | 0.13 | 0.13 | 0.13 | 0.13 |
8 | 0.2 | 0.2 | 0.42 | 0.36 |
Climate zone | Eastern aspect solar admittance | Northern aspect solar admittance | Southern aspect solar admittance | Western aspect solar admittance |
---|---|---|---|---|
1 | 0.07 | 0.07 | 0.10 | 0.07 |
2 | 0.10 | 0.10 | 0.10 | 0.10 |
3 | 0.07 | 0.07 | 0.07 | 0.07 |
4 | 0.07 | 0.07 | 0.07 | 0.07 |
5 | 0.10 | 0.10 | 0.10 | 0.10 |
6 | 0.07 | 0.07 | 0.07 | 0.07 |
7 | 0.07 | 0.07 | 0.08 | 0.07 |
8 | 0.08 | 0.08 | 0.08 | 0.08 |
Climate zone | Class 5, 6, 7, 8 or 9b building or a Class 9a building other than a ward area | Class 3 or 9c building or Class 9a ward area |
---|---|---|
1 | 2.4 | 3.3 |
2 | 1.4 | 1.4 |
3 | 1.4 | 3.3 |
4 | 1.4 | 2.8 |
5 | 1.4 | 1.4 |
6 | 1.4 | 2.8 |
7 | 1.4 | 2.8 |
8 | 1.4 | 3.8 |
Climate zone | Eastern aspect solar admittance | Northern aspect solar admittance | Southern aspect solar admittance | Western aspect solar admittance |
---|---|---|---|---|
1 | 0.12 | 0.12 | 0.12 | 0.12 |
2 | 0.13 | 0.13 | 0.13 | 0.13 |
3 | 0.16 | 0.16 | 0.16 | 0.16 |
4 | 0.13 | 0.13 | 0.13 | 0.13 |
5 | 0.13 | 0.13 | 0.13 | 0.13 |
6 | 0.13 | 0.13 | 0.13 | 0.13 |
7 | 0.13 | 0.13 | 0.13 | 0.13 |
8 | 0.2 | 0.2 | 0.42 | 0.36 |