Who we help · Insulation
Insulation for bungalows — big roof, big floor, quick wins.
In a bungalow, the roof and floor are a big share of the heat loss, because there's so much of both for the size of the home. Most from the 1950s–1980s have cavity walls, so the loft, the cavity and the floor are the usual measures — with room-in-roof for chalet and dormer bungalows.
Typical prices
Bungalow
- Loft insulation (new or top-up)£900–£2,000
- Cavity wall insulation£1,000–£2,000
- Suspended floor insulation£2,500–£6,000
- Room-in-roof£4,500–£9,000chalet
- External wall insulation + render£12,000–£20,000
- Draught-proofing£300–£800
Before grants · updated 11 October 2026 · a survey confirms the final figure.
Property types covered
Construction, heat loss and watch-outs
Detached bungalow
Full guide- Typical construction
- 1950s–1980s cavity; large loft and floor area
- Where heat is lost
- Roof and floor are a big share
- Usual measures
- Loft (large area), cavity, floor, solar on large roof
- Watch-outs
- Heat pump friendly; single storey EWI is quick
Semi and terraced bungalow
Full guide- Typical construction
- Cavity walls
- Where heat is lost
- Roof and floor
- Usual measures
- Loft, cavity, floor
- Watch-outs
- Good value per £
Chalet and dormer bungalow
Full guide- Typical construction
- Room-in-roof upstairs
- Where heat is lost
- Sloping ceilings, dormers, stud walls
- Usual measures
- Room-in-roof insulation, dormer cheeks, floor
- Watch-outs
- Often missed by competitors
Good to know
What makes these homes different
Large loft, shallow eaves
Bungalow lofts are large and often shallow at the eaves, so blown insulation can reach the corners rolls can't. The large loft area is why bungalow loft prices sit higher than for many houses.
Chalet and dormer bungalows
Upstairs rooms in the roof need room-in-roof insulation — sloping ceilings, knee walls and dormer cheeks. It's often missed.
Heat pump friendly
With the fabric insulated, bungalows suit heat pumps well, and single-storey EWI is quick to install where walls need it.
Recommended measures
Where to start
Loft insulation
Mineral wool laid between and across the joists to 270–300 mm so heat stays in the rooms below.
Blown loft insulation
Loose-fill insulation blown into awkward, shallow or low-headroom lofts that rolls can't reach.
Cavity wall insulation
A borescope survey, then blown mineral wool or bonded bead injected into empty cavity walls.
Suspended timber floor insulation
Mineral wool or rigid board between the joists with an airtight membrane.
Room-in-roof insulation
Insulating the sloping ceilings, stud walls, flat ceiling, gables and dormer cheeks of an attic room.
External wall insulation (EWI)
A complete certified build-up of insulation board, mesh and render from one system holder.
Bay, dormer and reveal insulation
Insulating bay walls, dormer cheeks and window reveals to remove cold spots.
Draught-proofing
Sealing doors, windows, letterboxes, hatches, floorboards and unused chimneys — every home's quick win.
Prices
Insulation prices for bungalows
| Measure | Bungalow |
|---|---|
| Loft insulation (new or top-up) | £900–£2,000 |
| Cavity wall insulation | £1,000–£2,000 |
| Suspended floor insulation | £2,500–£6,000 |
| Room-in-roof | £4,500–£9,000chalet |
| External wall insulation + render | £12,000–£20,000 |
| Draught-proofing | £300–£800 |
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.
Grants and savings that may help
- ECO4Closes in 73 days
Up to fully funded; paid by energy suppliers per measure
Grant via local councils (£960m nationally in 2026/27)
- Social Housing Fund
Landlord-led bids
Saves 20% VAT
- Local schemes
Varies
Eligibility depends on your circumstances and is confirmed by evidence and the funder or council.
0% VAT on energy-saving materials
Insulation, solar panels, batteries and heat pumps installed in homes in Great Britain are zero-rated for VAT until 31 March 2027. Windows and doors are not included.Questions
Common questions
What's the best insulation for a bungalow?
Start with the loft — it's a big share of a bungalow's heat loss — then cavity walls if they're empty, then the floor. Chalet bungalows also need room-in-roof insulation upstairs.
Why does bungalow loft insulation cost more than a house's?
A bungalow's loft covers the whole footprint of the home, so there's more area to insulate than in a two-storey house of similar floor space.
Can a chalet bungalow be insulated?
Yes — the sloping ceilings, knee walls, flat ceiling and dormer cheeks are insulated as room-in-roof, with loft insulation in the eaves voids where they're accessible.
Are bungalows good for heat pumps?
Often, yes — once the loft, walls and floor are insulated, the heat loss is low enough for a heat pump to work well. Our EPC planner ranks the steps for your home.
Begin your project
Price insulation for your home in two minutes
Tell us your property type and see a price range, with grants and 0% VAT applied where they fit. A survey always confirms the final figure.