Australian Capital Territory Numbered Regulations

BUILDING LEGISLATION AMENDMENT REGULATION 2010 (NO 1) (NO 15 OF 2010) - REG 16

substitute

    (1)     For section 24 (2), the alternative energy efficiency requirements for the unaltered part of a substantially altered building are as follows:

        (a)     for the walls—the external walls in the unaltered part have a total R-value that complies with the applicable value stated in the building code, volume 2, part 3.12.1.4 (External walls);

        (b)     for the roof—the roof in the unaltered part has a total R-value that complies with the applicable value stated in the building code, volume 2, part 3.12.1.2 (Roofs), adjusted as required under that part to compensate for insulation loss associated with any exhaust fans, flues or recessed down lights;

        (c)     for a suspended floor—any suspended floor (excluding an intermediate floor in a building with more than 1 storey) in the unaltered part has a total R-value that complies with the applicable value stated in the building code, volume 2, part 3.12.1.5 (Floors);

        (d)     any interface between a wall cavity and a suspended floor (excluding an intermediate floor in a building with more than 1 storey)—

              (i)     is continuously bridged with bulk thermal insulation of loose mineral, glass or plastic fibres preventing convection air movement from the sub-floor area through the wall cavity to the roof space; or

              (ii)     otherwise has a convection barrier that complies with the building code, volume 2, part 3.12.1.5 (Floors).