How much does insulation cost?

Insulation typically costs $8–$22 per m² installed, or about $1,600–$3,200 to insulate the ceiling of an average Australian home.

Typical price band

$2,300typical

$700 low$8,000 high

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Real-world examples

Ceiling top-up$700 – $1,400

Full ceiling install$1,600 – $3,200

Ceiling & underfloor with removal$4,000 – $8,000

— Area to insulate. Total square metres is the core driver of both material and labour.

— R-value & product. Higher R-value and acoustic or foil-backed products cost more per square metre.

— Ceiling vs underfloor vs walls. Ceilings are cheapest; underfloor and wall installs take much longer per square metre.

— Old insulation removal. Vacuuming out old or contaminated insulation can add $1,000–$2,500 on an average home.

— Roof space access. Tight, low or cluttered roof spaces with lots of downlights slow installers down.

— Check the quoted R-value, not just the price — a cheap quote with thin batts is a false economy.

— Installers must keep clearances around downlights and flues — ask how they'll handle yours.

— If your home pre-dates 1990, ask about checking for asbestos-containing materials before anyone disturbs the roof space.

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Indicative range only, not a quote. Get quotes from local tradies for an exact price. Last updated 13 July 2026.

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