PRICE GUIDE · TRADES & CONSTRUCTION · 2026–2027
Insulation Installer cost in the UK
£300–£8,000 per job. Typically £2,500.
Insulation jobs in UK homes run from £300 for topping up a loft to £8,000 for internal wall insulation, with around £2,500 typical for filling a semi's cavity walls. Which part of the house you insulate, its size and access, and whether a grant covers it decide what you pay.
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HOW MUCH IT COSTS
How much does an insulation installer cost in the UK?
| Low end | £300 | a loft top-up with easy access |
|---|---|---|
| Typical | £2,500 | what most people pay |
| High end | £8,000 | internal wall insulation across a whole house |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the builders and trades near you.
What moves the price
- Part of the house — loft insulation is the cheapest job, while solid wall insulation costs thousands
- Size of the home — more loft or wall area means more insulation material and installer time
- Access — boarded lofts, tight eaves and suspended floors make insulation slower to fit
- Material — mineral wool, rigid boards, blown fibre and spray foam each cost differently
- Grant funding — ECO4 and the Great British Insulation Scheme can cover insulation for eligible homes
- Making good — internal wall insulation means refitting skirting, sockets and decoration afterwards
Building and repair prices in the UK are up 6% over five years (ONS Consumer Price Inflation, Services for maintenance and repair, to 2026 August). Five years ago a typical insulation installer would have cost about £1420 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What an insulation installer booking includes
Takes: A few hours for a loft or cavity, several days for internal or external wall insulation. Not included: Boarding the loft, redecorating after wall insulation and repairs to damp or rotten timber are usually priced separately — see the related guides below.
WHAT PEOPLE BOOK
Common insulation jobs
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Insulation Installer near you, with prices shown
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How to pay less
- Check whether you qualify for ECO4 or the Great British Insulation Scheme before paying for insulation
- Start with the loft and any cavity walls, which are the cheapest insulation jobs for the heat saved
- Combine insulation with other planned work, such as a loft conversion or new floors, to share labour
Before you book
- Insulating solid walls can cause condensation if done badly, so ask how the insulation installer will manage moisture
- Ask for any insulation work to be registered with TrustMark if it is funded by a government scheme
- Check whether wall or floor insulation counts as renovating a thermal element under the Building Regulations
- Ask the insulation installer to keep the loft and wall vents clear once the insulation is fitted
Insulation Installer cost: questions people ask
£300–£8,000 per job, about £2,500 typical. A loft top-up costs least; internal wall insulation across a whole house costs the most.
A loft or cavity is usually done in a few hours. Internal or external wall insulation takes several days.
Possibly. ECO4 and the Great British Insulation Scheme, run through energy suppliers, fund insulation for households on certain benefits or in lower council tax bands.
For most homes, loft and cavity wall insulation give the biggest saving for the money. Solid wall insulation saves a lot of heat but costs much more.
Loft boarding, redecorating after wall insulation and repairs to damp or timber are usually extra.
They are Locufy guide prices for the UK, worked out from published UK insulation costs — a national range, not a quote. The part of the house and its size set your price.