Section J tips

1. Identify which spaces may be, or will be, mechanically heated or cooled.

2. Identify existing wall types. Identify proposed wall types as either :

  • fully masonry pre-cast panel/blockwork/brick or
  • lightweight.

If masonry identify if insulation is to be polystyrene foam board and battens or contained in a stud wall.
If lightweight identify if your preference is for battens fixed to studs or cladding directly fixed to studs.

3. Identify where roof/ceiling insulation is proposed to be located ie across rafters/purlins as is usual in non domestic style construction, between the rafters, or on the ceiling as is common in domestic type construction.

Confirm if a suspended ceiling is proposed.

Also confirm if lighting is proposed as ceiling mounted or recessed.

4. In climate zone 6 (Melbourne) – generally:

  • All new non residential roofs should achieve a total R value of 3.2 measured for heat ingress.
  • All external building envelope walls should generally achieve a total R value of 2.8 (some exemptions exist).
  • Internal envelope walls are required to achieve R1.0 or R1.8 depending on different conditions.

5. Skylights – should be no greater in area than 5% of the floor area of the room they serve (limited exemptions exist).

6. Glazing – large areas of unprotected glazing may have difficulty complying. In order to reduce the need for expensive glazing solutions or re-design, we recommend undertaking the glazing assessment in the early design phase rather than just prior to seeking the building permit.

7. Lighting Рa  lighting plan indicating proposed lamp wattages and whether or not fittings are recessed or ceiling mounted will be required to show compliance Рbut can be completed after the Section J report.