Australian Capital Territory Numbered Regulations

BUILDING (GENERAL) REGULATION 2008 (NO 3 OF 2008) - REG 29

    (1)     Relevant external glazing in the unaltered part of a class 1 or class 10 building need not comply with the building code, volume 2, part 3.12.2 (External Glazing) if the glazing is coated, and permanently bonded, on at least 1 side with a continuous polymeric coating, sheet or film that achieves—

        (a)     a total U value of 5.0 or less; and

        (b)     a solar heat gain coefficient of 0.25 or less.

    (2)     Incidental glazing in the unaltered part of a class 1 or class 10 building need not comply with the building code, volume 2, part 3.12.2 (External Glazing).

Example—incidental glazing

A bathroom has an external window of frosted glass that is 1.8m ² . An alteration to another part of the house is proposed. The frosted glass window of the bathroom need not comply with the building code requirements for external glazing, whether or not the alteration is a substantial alteration.

Note     An example is part of the regulation, is not exhaustive and may extend, but does not limit, the meaning of the provision in which it appears (see Legislation Act, s 126 and s 132).

    (3)     In this section:

"incidental glazing "means glazing in a non-habitable room that is completely separated by walls and doors from habitable areas of the building if the total area of glazing in the room is 2m ² or less.

"glazing" includes transparent and translucent roof lights.

"relevant external glazing" does not include incidental glazing.

"solar heat gain coefficient "means the fraction of incident irradiance on glazing that adds heat to the space inside a building.

"total U value" means transmittance (W/m ² .K) of the composite element allowing for the effect of any airspace and associated surface resistance.