NT Part 13.3 External glazing
NT 13.3.1 Application of Part 13.3New for 2022
This Part applies to—
- a Class 1 building; and
- a Class 10a building with a conditioned space.
NT 13.3.2 External glazingNew for 2022
Compliance with this part is demonstrated with a “passed” result produced with the ABCB Glazing calculator certificate for the glazing in the building.
NT 13.3.3 ShadingNew for 2022
- be provided by an external permanent projection, such as a verandah, balcony, fixed canopy, eaves, shading hood or carport, which—
- be provided by an external shading device, such as a shutter, blind, vertical or horizontal building screen with blades, battens or slats, which—
- is capable of restricting at least 80% of the summer solar radiation; and
- if adjustable, is readily operated either manually, mechanically or electronically by the building occupants.
- Shading devices can include fixed louvres, shading screens and other types of perforated or fixed angle slatted shades. However, such devices need to be designed for the climate and latitude to ensure that summer sun penetration is restricted, while winter sun access is achieved.
- Gutters can only be considered as providing shading if attached to a shading projection such as a verandah, fixed canopy, eaves, shading hood, balcony or the like.
- Shading devices can be either attached or located adjacent to the building. For example, a free-standing lattice screen may be considered to provide shading to glazing if it complies with NT 13.3.3(b)(ii).
- An adjustable shading device should be readily operated from a safe location or platform that does not require ladders, rigging, harnessing or the like.