INSULATION STANDARD
Ceiling and underfloor insulation has been required in rental properties since 2019, but the HHS introduced higher expectations around quality, coverage, and R-values. From 1 July 2025, all rental homes must meet these upgraded requirements, even if insulation was previously compliant.
Insulation must be in good condition, free from moisture, gaps, or compression, and meet the minimum R-values for your climate zone. In some cases, topping up or replacing older insulation is required.
COMMON INSULATION COMPLIANCE QUESTIONS
What condition should my insulation be in? It must be dry, secure, and at least 120mm thick- without mould, gaps, or pests. If it’ s compressed or degraded, it likely needs topping up.
What are the required R-values? This varies by region, see the current R-value map shown here to check
Do I need to reinsulate if I met the 2016 rules? Some landlords may need to upgrade existing insulation if it has settled or no longer meets the required R-values. In these cases, an update is necessary to remain compliant.
Are there any exemptions? Yes- if access is unsafe or impractical( e. g., slab foundations or tight ceiling spaces), or if another dwelling sits directly above or below. Partial exemptions may apply to underfloor insulation installed legally before 2008 with a Code Compliance Certificate( CCC).
Zone 1 Ceiling R 2.9, underfloor R 1.3
Zone 2 Ceiling R 2.9, underfloor R 1.3 Zone 3 Ceiling R 3.3, underfloor R 1.3
22 LANDLORD INFORMATION GUIDE