Some existing insulation will need to be topped up or replaced. Depending on location, ceiling insulation needs to meet minimum R-values,* or existing ceiling insulation needs to be at least 120mm thick. Underfloor insulation needs a minimum R-value of 1.3.
*R stands for resistance – an R-value is a measure of how well insulation resists heat flow.
>> View full details of Healthy Homes Insulation Standards