Sydney insulation prices, updated October 2026

Insulation Cost in Sydney

Insulation removal in Sydney typically costs $15–$30 per m² of ceiling, and new Knauf Earthwool® batts typically cost $15–$30 per m² installed. Removing old insulation and installing new batts together typically costs $30–$60 per m². Prices are indicative and confirmed in writing after a free on-site assessment by our Prestons team.

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On-Site

Tile Roof Retrofit

Extraction & Batts

1. Old blown-in removal via vacuum

2. Earthwool® batts install

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Updated 27 October 2026

What the price includes

Our Sydney prices are quoted per square metre of ceiling and include:

Removal
Vacuum extraction of the old insulation, dust and debris from the roof space through hoses into a sealed truck, and disposal.
New batts
Supply and installation of Knauf Earthwool® glasswool batts fitted between the ceiling joists, with clearances kept around downlights and flues.
Assessment
A free on-site assessment first, and a written quote before any work starts.

Step-by-step ceiling batt installation between timber joists

What changes the price

Every roof is measured and inspected before we quote. These are the things that move a job up or down the range:

Roof size

Prices are per square metre of ceiling, so the area to be done is the biggest factor.

Roof pitch and access

A low-pitched roof or a small manhole means slower, more careful work in a tight space, which sits at the top of the range. A high roof with good access sits towards the bottom.

What is in the roof

Heavy droppings, nesting material, old loose-fill or several layers of old batts take longer to vacuum out than a single layer of tired batts.

The R-value you choose

Higher R-value batts are thicker and cost more to supply. We recommend an R-value for your home at the assessment.

Sydney homes

Sydney's housing ranges from federation homes and inner-west terraces to brick veneer homes in the west. Federation homes often have high roofs that are easy to work in, while terraces can be tight. Some NSW homes built before 1980 were insulated with loose-fill asbestos, so check the NSW Government's Loose-fill Asbestos Insulation Register before any roof work. We don't work where asbestos is present.

What R-value do Sydney homes need?

Coastal and eastern Sydney is in climate zone 5 and western Sydney is in climate zone 6 under the National Construction Code. You can check your address on the ABCB climate zone map, linked under Sources below.

For a new home built to the NCC 2022 deemed-to-satisfy provisions, the minimum ceiling insulation for a pitched roof with a flat ceiling is R2.5 to R3.0 in climate zone 5 and R3.0 to R4.0 in climate zone 6, depending on the roof colour, ventilation and what is under the roof (ABCB Housing Provisions, Tables 13.2.3f and 13.2.3g). In NSW, the BASIX certificate for a new home sets its insulation.

Upgrading the insulation in an existing home doesn't have to meet the new-home minimums, but they are a sensible starting point. We recommend an R-value for your roof at the free assessment.

Worn, uneven insulation lying across ceiling joists in a roof space

Getting an exact price

Book a free on-site assessment and we'll measure the roof, check what's in it and give you a written quote. Call (02) 7233 1266, Monday to Friday, 7:30am–4pm, or use the quote form on this page.

Before and after comparison of a roof space cleared of old insulation

Typical prices in Sydney

Old insulation removal: typically $15–$30 per m²Covers vacuum extraction of old insulation, dust and debris from the roof space, and disposal.
New batts installed: typically $15–$30 per m²Covers supply and installation of new Knauf Earthwool® batts, depending on R-value, roof size and pitch.

Indicative only. Your price is confirmed in writing after a free on-site assessment. Prices are the same in Perth, Melbourne, Sydney and Brisbane. Updated October 2026.

Worked examples for Sydney homes

Removal at $15–$30 per m², new batts at $15–$30 per m², or both together at $30–$60 per m². Ceiling areas are examples; we measure your roof at the free assessment.

Typical insulation costs for two example ceiling sizes
Home	Old insulation removed	New batts installed	Removal and new batts
Smaller three-bedroom homeabout 120 m² of ceiling	$1,800–$3,600	$1,800–$3,600	$3,600–$7,200
Larger four-bedroom homeabout 180 m² of ceiling	$2,700–$5,400	$2,700–$5,400	$5,400–$10,800

Indicative only. Your price is confirmed in writing after a free on-site assessment.

Cost guides by city

Sources

Frequently Asked Questions

How much does insulation removal cost in Sydney?

Old insulation removal in Sydney typically costs $15–$30 per m² of ceiling. For a larger four-bedroom home with about 180 m² of ceiling that is roughly $2,700–$5,400, confirmed in writing after a free on-site assessment.

How much does ceiling insulation cost in Sydney?

New Knauf Earthwool® ceiling batts typically cost $15–$30 per m² installed in Sydney. Removing old insulation and installing new batts together typically costs $30–$60 per m², about $5,400–$10,800 for a 180 m² ceiling.

How do I check for loose-fill asbestos in Sydney?

Search the NSW Government's Loose-fill Asbestos Insulation Register for your address. The register only lists homes that have tested positive, so if your home was built before 1980 and has loose, fluffy insulation, have a licensed assessor test it before anyone works in the roof.

What R-value insulation should I use in Sydney?

Coastal Sydney is climate zone 5 and western Sydney is zone 6. New homes built to the NCC 2022 deemed-to-satisfy provisions need R2.5 to R3.0 ceiling insulation in zone 5 and R3.0 to R4.0 in zone 6, depending on the roof. We recommend an R-value for your home at the assessment.

Where are you based in Sydney?

Our Sydney depot is at Unit 4/1 Powdrill Rd, Prestons NSW 2170. Call (02) 7233 1266, Monday to Friday, 7:30am–4pm. Site visits are by appointment.