How much does insulation cost in Geelong?
Roof and ceiling insulation are among the jobs Geelong searches for most, and the roof is the cheapest place to start: batts laid in the roof space cost $11–$33 a square metre installed, or $1,125–$3,725 for a whole three-bedroom ceiling. That is the most common size of home locally. Three-bedroom homes make up 46.4% of Geelong dwellings, well above the 39% national share, and separate houses, each with a roof cavity of its own, account for 86.7% of homes (ABS 2021 Census). Underfloor batts cost $14–$42 a square metre, and wall batts $9–$23 while the frame is still open. Prices include GST.
Comparing cities, or after the Australia-wide picture? See the national guide: Insulation cost in Australia.
Detailed Pricing — Insulation Cost in Geelong 2026
| Service | Low | Typical | High |
|---|---|---|---|
| Ceiling insulation batts (per sqm installed) | $11/sqm | $19 | $33 |
| Wall insulation batts, open frame (new build or renovation, per sqm installed) | $9/sqm | $14 | $23 |
| Underfloor insulation (per sqm installed) | $14/sqm | $23 | $42 |
| Ceiling insulation – 3-bed home (total) | $1,125total | $2,325 | $3,725 |
| Wall insulation – 3-bed home (total) | $1,400total | $2,325 | $3,725 |
| Underfloor insulation – 3-bed home | $1,125total | $1,850 | $2,975 |
| Reflective foil insulation (per sqm) | $7/sqm | $13 | $20 |
| Spray foam insulation (per sqm) | $28/sqm | $46 | $93 |
| Blown-in / loose-fill (per sqm) | $17/sqm | $23 | $46 |
| Ceiling insulation top-up over existing (per sqm installed) | $9/sqm | $17 | $28 |
| Remove old insulation (per sqm) | $7/sqm | $14 | $23 |
| Labour only (insulation installer, per hr) | $37/hr | $56 | $74 |
| Retrofit wall insulation, existing walls (blown-in or injected, per sqm) | $23/sqm | $37 | $65 |
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Get Geelong quotes →Prices include GST. Based on Geelong metro area, October 2026. Outer suburbs may vary.
Geelong insulation: walls three ways, replacing old ceiling insulation, and acoustic
Insulating walls in Geelong: batts, foam or loose-fill
Wall batts are $9–$23 a square metre installed in our Geelong table, blown-in loose-fill $17–$46 and spray foam $28–$93. For 100 square metres of wall at the typical prices that is $1,400 in batts or $4,600 in spray foam.
Replacing or topping up old ceiling insulation in Geelong
Removing old insulation is $7–$23 a square metre in our Geelong table and new ceiling batts $11–$33; over 100 square metres that comes to $3,300 at the typical prices. Topping up what is already there is $9–$28 a square metre, or $1,700 over the same area.
Acoustic insulation in Geelong
Our Geelong table prices thermal insulation and has no acoustic rows, so we don't publish a price for soundproofing.
These answers use the prices in the table on this page.
What Affects Insulation Costs in Geelong
Start in the roof space
Warm air rises, so the ceiling is where a dollar of insulation does the most. If thin or patchy batts are already up there, a top-up layer over the existing batts is $9–$28 a square metre. A full new layer for a three-bedroom ceiling is $1,125–$3,725. A roomy manhole and a pitched roof keep labour down; a low-pitched roof or a cathedral ceiling pushes it up.
Zone 6 winters
Under the National Construction Code, central Geelong falls in climate zone 6, described as mild temperate. The Code's minimum insulation levels are a total R-value, set separately for roof, walls and floor, and they change from zone to zone. At the Breakwater station July, the coldest month, averages 14.4 °C by day and 6.4 °C overnight (BOM averages), so holding heat in is the main job. Have the quote name the R-value for zone 6.
Victorian Energy Upgrades
Ceiling insulation is one of the activities covered by Victorian Energy Upgrades, the state program that discounts energy-efficient products and services when an accredited provider does the work (Essential Services Commission). Before you sign, ask whether your installer holds accreditation and whether your home qualifies. Nothing comparable exists federally: the Australian Government offers no incentive for insulating a home, so any federal discount line on a quote needs a hard look.
Insulating beneath the house
Geelong residents often search for underfloor work, which suits a house raised on stumps with room to crawl beneath. It costs $14–$42 a square metre, or $1,125–$2,975 for a three-bedroom home. The installer has to work lying under the house, so dry ground helps. March is Geelong's driest month at 24.2 mm and October its wettest at 56.3 mm (BOM averages).
Open frames or finished walls
Walls are cheap to insulate while the plaster is off: open-frame batts cost $9–$23 a square metre. After plasterboard goes up, the only way in is to pump or inject material into the closed cavity, at $23–$65, more than double the typical open-frame rate. For a three-bedroom house the open-frame job comes to $1,400–$3,725.
Clearing out the old layer
Locals also search for insulation removal. Settled, damp or vermin-soiled batts are removed for $7–$23 per square metre, and that happens before the new product is laid. In an older house, have anything that might contain asbestos assessed before anyone disturbs it. Where the roof is too low to kneel in, blown-in loose fill at $17–$46 can reach corners that batts cannot.
Foil, foam and hourly rates
January is Geelong's warmest month at 26.0 °C on average (BOM averages), so reflective foil, at $7–$20, earns its place mostly against summer sun on the roof. Spray foam, $28–$93, seals odd gaps that batts cannot. Acoustic batts are not in our table, so ask for them on a separate line. Small jobs are sometimes billed hourly at $37–$74.
How to Save Money on Insulation Cost in Geelong
Insulation Cost in Geelong by Home Size
Locals search for insulation removal, so take a ceiling where the old layer comes out. Say 90 square metres of roof needs the old batts out and new ones in: removal at $7–$23 plus new batts at $11–$33 a square metre comes to $1,620–$5,040, while a top-up alone at $9–$28 a square metre comes to $810–$2,520.
A job of that size shifts with the roof and the floor beneath it. A low-pitched roof or cathedral ceiling raises labour, and a roof too low to kneel in may take loose fill. Underfloor for three bedrooms is $1,125–$2,975, with the installer working lying beneath the floor, which dry ground makes easier; acoustic batts are asked for on their own line.
Insulation Cost in Geelong: What the Quote Should Include
Geelong readers search for underfloor work and for removal of old insulation, so a Geelong quote should show those lines clearly rather than folding them into a lump sum. Ask for the roof, the floor and any strip-out each priced with its own area.
- Thin or patchy batts already in the roof: a top-up layer at $9–$28 a square metre priced beside a full new layer at $11–$33 a square metre.
- Strip-out of settled, damp or vermin-soiled batts at $7–$23 a square metre, written as a separate line that comes before the new product.
- Roof shape noted: a roomy manhole and pitched roof keep labour down, a low pitch or cathedral ceiling pushes it up.
- Underfloor work at $14–$42 a square metre, with the room beneath the house measured and any damp looked for before the price is set.
- Walls shown as open-frame batts at $9–$23 a square metre, or pumped or injected into a closed cavity at $23–$65, with the wall area for each.
- Loose fill at $17–$46 a square metre for a roof too low to kneel in, kept apart from the batt lines.
- Reflective foil at $7–$20 a square metre against summer sun on the roof, and spray foam at $28–$93 for odd gaps, each listed on its own.
- Acoustic batts, if wanted, asked for on a separate line, with the product named.
- Hourly billing for a small job at $37–$74 an hour, an R-value written for every area, then warranty and GST.
Frequently Asked Questions — Insulation Cost in Geelong
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 →