Group A · Loft and roof insulation
Loft clearance and replacement
Old, damp or damaged insulation removed, the loft cleaned, then new mineral wool fitted.
Price by property type
Loft clearance and replacement
- Mid-terrace£1,200–£2,500
- Semi / end-terrace£1,500–£3,000
- Detached£2,000–£4,000
- Bungalow£2,000–£4,500
- Flat / block£900–£2,000
Before grants · updated 11 October 2026 · a survey confirms the final figure.
- Best for
- Older or failed lofts, pre-sale
- Guarantee or standard
- Waste transfer notes
- Time on site
- Usually one to two days for a typical house: clearance, a clean and new insulation.
- Typical price
- From £900
What it is
What is loft clearance and replacement?
Old, damp or damaged insulation removed, the loft cleaned, then new mineral wool fitted.
Best for: Older or failed lofts, pre-sale.
Build-up
Loft insulation
Cold, ventilated loft
Warm room below
- 1Cross layer laid over the joistsSecond roll laid at right angles
- 2First layer between the joists
- 3Ceiling
Mineral wool to 270–300 mm, with the eaves kept clear for ventilation.
Who it suits
Which homes is loft clearance and replacement suitable for?
Is my home suitable?
Pick your property type for a straight answer on loft clearance and replacement.
Guidance only — every home is different, and a survey confirms what suits yours.
Houses
- Detached house
- Semi-detached house
- End-of-terrace
- Mid-terrace
- Townhouse
- Mews house and cottage
- Detached bungalow
- Semi and terraced bungalow
- Chalet and dormer bungalow
- Period home
- 1930s home
- Post-war and ex-council house
- Non-traditional / system-built
- Listed building or conservation area
- Farmhouse, barn conversion or rural home
- New build or self-build
Flats and blocks of flats
Commercial and public buildings
Usually suitable Depends — a survey confirms
Not usually suitable for 1 property type
- Park and mobile home — Park and mobile homes need specialist systems, which we arrange through a partner rather than standard measures.
Materials and brands
What we use
Removal of old, damp, compressed, rodent-damaged or contaminated insulation, loft clean, then new mineral wool.
Insulation brands we work with
- Knauf Insulation (Earthwool, Supafil blown)
- Rockwool
- Superglass
- Isover
- Kingspan
- Celotex
- Recticel
- Xtratherm
- Steico wood-fibre
- YBS and Actis multifoil
The exact system and brand for your home are confirmed in your written quote.
Heat, bills and EPC
What it does for your heat loss, bills and EPC
Heat rises, so a poorly insulated roof is often the largest single route out for heat. Insulating it lowers the roof's U-value — how easily heat passes through — so the heating runs less and the EPC rating usually improves. The gain is largest where there's little insulation now; topping up a loft that's already reasonably insulated gains less.
See the EPC points and savings for your home in the EPC plannerU-value before and after, typical heat and bill saving, and EPC points — worked out for your property.Price
How much does loft clearance and replacement cost?
Prices change with your property type. Pick your column — the quote builder then refines it for your home.
| Measure | Mid-terrace | Semi / end-terrace | Detached | Bungalow | Flat / block |
|---|---|---|---|---|---|
| Loft clearance and replacement | £1,200–£2,500 | £1,500–£3,000 | £2,000–£4,000 | £2,000–£4,500 | £900–£2,000 |
Indicative ranges for London and the South East, supplied and installed, including VAT, before grants. Updated 11 October 2026. A survey confirms your final price.
VAT on this work
Insulation installed in homes in Great Britain is zero-rated for VAT until 31 March 2027. Other parts of a job like this — such as a new roof covering, structural work or waterproofing — may be standard-rated. Your quote shows the split.What to expect
Time on site, disruption and approvals
Time on site
Usually one to two days for a typical house: clearance, a clean and new insulation.
Disruption
Moderate in the loft and landing — old insulation is bagged and carried out, so we protect the route through your home.
Planning and building control
Loft insulation doesn't need planning permission or building control. Re-roofing, flat roof replacement and turning a roof space into a room must meet Building Regulations Part L, and we handle the notification.
Guarantee and standard
Waste transfer notes. The guarantee and certification for your job are confirmed in writing in your quote.
60-second grant check
Could a grant help pay for it?
Grant eligibility checker
About 60 seconds · plain results: likely, possibly or not eligible
Before we start
What type of property is it?
Questions
Loft clearance and replacement: your questions answered
How much does loft clearance and replacement cost?
Typical installed prices in London and the South East, including VAT and before any grant: £1,200–£2,500 for a mid-terrace; £1,500–£3,000 for a semi-detached or end-of-terrace house; £2,000–£4,000 for a detached house; £2,000–£4,500 for a bungalow; £900–£2,000 for a flat. Prices updated 11 October 2026. A survey confirms your final figure.
When does old loft insulation need removing?
When it's damp, compressed, soiled by rodents or birds, contaminated, or so patchy that a top-up won't fix it. A pre-sale clear-out is another common reason.
What happens to the old insulation?
It's bagged and removed by registered waste carriers, and you get waste transfer notes for your records.
Do you check anything else while the loft is empty?
Yes — an empty loft is the best time to spot leaks, damaged timbers, missing ventilation and unsafe wiring. We report anything we find before the new insulation goes down.
Group A
More in loft and roof insulation
Loft insulation
Mineral wool laid between and across the joists to 270–300 mm so heat stays in the rooms below.
Loft insulation top-up
An extra cross-layer over existing insulation to reach the recommended 270 mm or more.
Blown loft insulation
Loose-fill insulation blown into awkward, shallow or low-headroom lofts that rolls can't reach.
Raised loft boarding and storage
Loft legs or raised boarding over full-depth insulation, so storage doesn't crush it.
Insulated loft hatch and ladders
An insulated, draught-sealed hatch and loft ladder — a small add-on that stops a big leak.
Room-in-roof insulation
Insulating the sloping ceilings, stud walls, flat ceiling, gables and dormer cheeks of an attic room.
Begin your project
Price loft clearance and replacement in two minutes
See a price range for your property type, with grants and 0% VAT applied where they fit. A survey always confirms the final figure.