How much does insulation cost in Canberra?
Ceiling batts in Canberra cost $13–$38 a square metre installed, or $1,325–$4,400 to do the ceiling of a typical three-bedroom house. Walls are priced two ways: $11–$28 for batts fitted before the plasterboard goes on, and $28–$77 to blow or inject fill into walls that are already lined. Underfloor insulation is $16–$50. Canberra is a cool temperate city, NCC climate zone 7, with winter nights that dip below freezing on average (BOM averages), and the ACT backs ceiling insulation with its own loans, rebates and a rental standard. Prices include GST.
Comparing cities, or after the Australia-wide picture? See the national guide: Insulation cost in Australia.
Detailed Pricing — Insulation Cost in Canberra 2026
| Service | Low | Typical | High |
|---|---|---|---|
| Ceiling insulation batts (per sqm installed) | $13/sqm | $22 | $38 |
| Wall insulation batts, open frame (new build or renovation, per sqm installed) | $11/sqm | $16 | $28 |
| Underfloor insulation (per sqm installed) | $16/sqm | $28 | $50 |
| Ceiling insulation – 3-bed home (total) | $1,325total | $2,750 | $4,400 |
| Wall insulation – 3-bed home (total) | $1,650total | $2,750 | $4,400 |
| Underfloor insulation – 3-bed home | $1,325total | $2,200 | $3,525 |
| Reflective foil insulation (per sqm) | $9/sqm | $15 | $24 |
| Spray foam insulation (per sqm) | $33/sqm | $55 | $110 |
| Blown-in / loose-fill (per sqm) | $20/sqm | $28 | $55 |
| Ceiling insulation top-up over existing (per sqm installed) | $11/sqm | $20 | $33 |
| Remove old insulation (per sqm) | $9/sqm | $16 | $28 |
| Labour only (insulation installer, per hr) | $44/hr | $66 | $88 |
| Retrofit wall insulation, existing walls (blown-in or injected, per sqm) | $28/sqm | $44 | $77 |
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Get Canberra quotes →Prices include GST. Based on Canberra metro area, October 2026. Outer suburbs may vary.
Insulating a Canberra home: walls, ceiling and floor together, materials compared, old insulation out
Walls, ceiling and underfloor for a Canberra 3-bedroom home
For a 3-bedroom home our Canberra table prices ceiling insulation at $1,325–$4,400, wall insulation at $1,650–$4,400 and underfloor insulation at $1,325–$3,525. All three at the typical prices add up to $7,700. By the square metre, installed batts are $13–$38 for ceilings, $11–$28 for walls and $16–$50 underfloor.
Batts, blown-in, spray foam or foil in Canberra
Per square metre in our Canberra table: blown-in or loose-fill is $20–$55, spray foam $33–$110 and reflective foil $9–$24. At the typical figures spray foam costs $39 a square metre more than wall batts.
Topping up or replacing old insulation in Canberra
Topping up existing insulation is $11–$33 a square metre in our Canberra table. Taking old insulation out first is $9–$28 a square metre; removing it from a 100 square metre ceiling and laying new batts comes to $3,800 at the typical prices.
Canberra's climate zone and the building code
On the Australian Building Codes Board climate zone map Canberra is in zone 7 (cool temperate). The Australian Government's YourHome guide notes: "The NCC specifies that vertical edges of a slab-on-ground must be insulated if located in Climate zones 7 or 8 (cold climates)".
These answers use the prices in the table on this page.
Local figures: Australian Building Codes Board climate zone map (National Construction Code); YourHome (Australian Government), insulation.
What Affects Insulation Costs in Canberra
The R5 benchmark
The ACT's rental standard sets a useful yardstick: a rental home with no ceiling insulation, or insulation rated below R2, must be brought up to at least R5, which the ACT Government calls the standard level for new builds. Up to 35 per cent of heat escapes through the ceiling of an uninsulated Canberra house in the colder months, the ACT Renting Book says. Topping up over old batts is $11–$33.
Climate zone 7
Under the NCC each climate zone has its own minimum insulation levels for the roof, the walls and the floor, and Canberra falls in zone 7, so every quote should name the R-value it delivers. In zones 7 and 8 the code also requires the vertical edges of a slab-on-ground to be insulated, which matters if you are building new or extending on a slab. July days at Canberra Airport average just 11.4 °C (BOM averages).
Open walls or lined walls
Wall insulation tops the searches that bring Canberra readers here, and its price turns on whether the wall is open. Open-frame batts cost $11–$28, about $1,650–$4,400 for three bedrooms. Blowing or injecting fill into lined walls costs more, at $28–$77, and YourHome warns cavity fill carries a high moisture risk in timber-framed walls.
No federal rebate, but ACT loans
Canberra owners will find no federal insulation rebate. ACT homeowners can instead apply to the Sustainable Household Scheme, which lends $2,000 to $20,000 at 3 per cent interest, repayable over up to 10 years, for a list of products that includes ceiling insulation.
Concession card rebate
ACT homeowners who hold a Pensioner Concession Card, a DVA Gold Card or a Health Care Card, and who live in the home, can claim a Home Energy Support rebate of half the supply and installation cost of ceiling insulation, up to $2,500. On a typical three-bedroom ceiling that half would be $1,375. Anyone eligible for that rebate may also be able to borrow up to $10,000 interest-free to cover the rest.
Renters and units
About 30.7% of Canberra households rent (ABS 2021 Census). Landlords must say whether a home meets the ceiling insulation standard when they advertise it and when the lease is signed, and must hand over their records if the tenant asks. Flats are 19.4% of the housing here, so the exemptions matter: lower-floor units are exempt, and a top-floor unit can get a temporary exemption if the owners corporation refuses permission.
Asbestos, wiring and old batts
In some older homes loose-fill asbestos was used as ceiling insulation, and the ACT keeps a public register of the small number of affected homes that remain. If you suspect any asbestos, call a licensed asbestos assessor before anyone enters the roof, as all asbestos removal in the ACT needs a licensed removalist. Have an electrician check wiring and downlights too. Clearing old insulation that is safe to handle is $9–$28.
How to Save Money on Insulation Cost in Canberra
Insulation Cost in Canberra by Home Size
Walls scale with the area of wall, so size them in square metres. Say 120 square metres of wall is open during a renovation: at $11–$28 a square metre that comes to $1,320–$3,360, and the same area filled through lined walls at $28–$77 a square metre comes to $3,360–$9,240. The three-bedroom wall row, $1,650–$4,400, prices a whole house as one job.
The build and the building both move a Canberra job of that size. How the walls are built is checked before a fill method is chosen, a unit brings an owners corporation to consult, and a rental needs the landlord's agreement. July days are cold in Canberra, and a top-up over old batts is $11–$33 a square metre.
Insulation Cost in Canberra: What the Quote Should Include
Wall insulation leads the searches behind this Canberra page, so a quote should say plainly whether the wall line is an open-frame job or a fill job in lined walls. Ask for walls, ceiling and underfloor on separate lines.
- A wall line labelled open frame or lined wall: open-frame batts at $11–$28 a square metre, or blown or injected fill at $28–$77 a square metre.
- How the walls are built, noted by the installer before a fill method is chosen, with the wall area in square metres for each method.
- Ceiling batts at $13–$38 a square metre installed, with the roof area, the product and the R-value it is rated at.
- A top-up over old batts at $11–$33 a square metre, set against clearing old insulation at $9–$28, each with its area.
- Underfloor area and price at $16–$50 a square metre, with the whole-floor row of $1,325–$3,525 for a three-bedroom home as a cross-check.
- Blown-in fill at $20–$55 a square metre for a tight roof space where batts cannot reach the corners, as a separate area.
- For a unit or a rental, the owners corporation or landlord who has agreed to the work named on the quote.
- Roof-space work booked outside the height of summer, since the ceiling cavity runs hot, with the dates written down.
- Warranty on the product and the work, payment stages and GST.
Frequently Asked Questions — Insulation Cost in Canberra
Our Methodology
These are independent estimates from public cost guides, marketplaces and industry rate data, and no tradesperson can influence them, so always get a few quotes. Last reviewed October 2026. Read our full methodology →