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Ceiling insulation is being installed in a rental in zone 3 (the colder central and southern areas). What minimum R-value, when installed, meets the healthy homes insulation standard?

Correct Answer

D) R 3.3 for the ceiling, with underfloor insulation of at least R 1.3.

Regulation 14 requires qualifying ceiling insulation to have an installed R-value of at least 2.9 in zones 1 and 2, or 3.3 in zone 3, be installed to NZS 4246:2016, and be in reasonable condition. Regulation 16 requires underfloor insulation of at least R 1.3.

Answer Options
A
R 2.9 for the ceiling, with underfloor insulation of at least R 1.3.
B
R 1.3 for the ceiling, the same minimum as for underfloor insulation.
C
Any R-value is enough, provided the ceiling is fully covered with insulation.
D
R 3.3 for the ceiling, with underfloor insulation of at least R 1.3.

Why This Is the Correct Answer

Regulation 14(1)(a)(ii) sets R 3.3 for ceilings in zone 3; reg 16 sets R 1.3 underfloor.

Why the Other Options Are Wrong

Option A: R 2.9 for the ceiling, with underfloor insulation of at least R 1.3.

R 2.9 is the ceiling minimum for zones 1 and 2; zone 3 needs R 3.3.

Option B: R 1.3 for the ceiling, the same minimum as for underfloor insulation.

R 1.3 is the underfloor figure under reg 16; ceilings need much more.

Option C: Any R-value is enough, provided the ceiling is fully covered with insulation.

Regulation 14 sets minimum R-values by climate zone as well as full coverage.

Background Knowledge for Property Management

Source: https://www.legislation.govt.nz/regulation/public/2019/0088/latest/whole.html

Exam Tip for Property Management

Ceilings R 2.9 (zones 1โ€“2) or R 3.3 (zone 3); underfloor R 1.3.

Common Mistakes to Avoid on Property Management Questions

  • โ€ขApplying the zone 1โ€“2 ceiling figure to zone 3.
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