Home project cost
How Much Does Loft Insulation Cost?
Insulate a 1,000 sq ft loft to recommended R-value
DIY range
$400-$1,200
Professional range
$1,000-$3,000
What drives the cost
- Existing insulation depth and whether it needs removing
- Material — fibreglass batt, blown-in, or mineral wool
- Access difficulty and roof structure
- Target R-value for your climate zone
Loft insulation is one of the fastest-paying-back home upgrades on this list, often recovering its cost within two to five heating seasons depending on climate and current insulation levels.
Put this into practice
- Insulation R-Value CalculatorWhat R-value do I need, and how much?
- Energy Savings CalculatorWill this upgrade pay for itself?
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