Independent costs, scores and savings data for loft insulation in the UK. Free comparison tool and local installer matching.
Loft insulation is the single most cost-effective home improvement for most UK homeowners. Up to 25% of a home's heat escapes through the roof — proper insulation stops this instantly. We recommend foil insulation (8.5/10) or fibreglass mineral wool (7.5/10) for most properties.
| Factor | Detail |
|---|---|
| Our Independent Score | 7.5/10 |
| Typical Cost (semi-det) | £300–£500 |
| Annual Energy Saving | £100–£200/yr |
| Payback Period | 2–4 years |
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