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AnswerHow much does room-in-roof insulation cost?
Room-in-roof insulation typically costs £1,500–£4,000 in the UK and saves around £150–£400 a year on heating, with payback of about 5–10 years.
Insulation is the cheapest way to cut bills and is the smart first step before a heat pump — a warmer, tighter home needs a smaller, cheaper system.
| Cost | £1,500–£4,000 (for loft conversions) |
|---|---|
| Annual saving | £150–£400 |
| Payback | 5–10 years |
2026 figures, based on Energy Saving Trust, Ofgem & gov.uk data · always confirm with a professional survey.