How Much Does Loft Insulation Cost?
Clear, realistic price expectations and cost factors for UK homeowners considering a loft insulation upgrade, top-up, or removal.
Estimated Loft Insulation Costs by Property Type
Every loft is different, but the table below outlines typical budget expectations for a standard mineral wool installation to 270mm–300mm depth.
| Property Type | Loft Floor Area | Typical Price Range | Top-Up Only |
|---|---|---|---|
| 2 Bed Mid-Terrace | approx. 28m² – 35m² | £400 – £650 | £300 – £480 |
| 3 Bed Semi-Detached | approx. 40m² – 55m² | £550 – £850 | £420 – £620 |
| 4 Bed Detached House | approx. 65m² – 90m² | £750 – £1,200 | £550 – £880 |
| Detached Bungalow | approx. 70m² – 110m² | £850 – £1,450 | £650 – £1,050 |
*Note: Figures above are indicative estimates including VAT and fitting. Final written quotation issued after assessment.
Key Factors Influencing Your Quotation
1. Loft Floor Size & Access
Larger floor footprints require more rolls. Awkward hatch sizes or restricted headroom add labor time.
2. Old Insulation Removal
If existing insulation is water-logged, compressed or contaminated by pests, removal, vacuuming and bagging adds labor.
3. Raised Boarding Subframes
Fitting raised legs (e.g. Loftleg) above 300mm insulation for storage adds materials and boarding labor.
4. Eaves & Roof Ventilation
Installing lap vents or eaves baffles to maintain timber airflow ensures moisture protection alongside insulation.
Frequently Asked Cost Questions
Do you charge for a survey or assessment?
No. Our initial desktop or in-person loft assessment is completely free with no obligation to proceed.
When do I pay?
Payment details are outlined in your written quotation before work commences. We never ask for full upfront payments prior to survey confirmation.
Get an Exact Price
Request your free assessment for a tailored written quotation.