The short answer
Friable asbestos is asbestos-containing material that can be crumbled, pulverised or reduced to powder by hand pressure when dry — or that is already a powder. Its fibres are held loosely, so they can be released into the air with very little disturbance.
Non-friable (bonded) asbestos is material in which the fibres are locked into a solid matrix, such as cement, vinyl or resin. Asbestos cement sheeting — "fibro" — in good condition is the classic example.
Both contain the same mineral fibres, and both are hazardous if the fibres are released and breathed in. The difference is how easily that happens. That is why the two are regulated differently, and why friable material is treated as the higher-risk category.
Why friability matters
Asbestos harms people when fibres become airborne and are inhaled. A bonded sheet left intact releases very little; the fibres stay locked in the cement until the sheet is cut, drilled, sanded, broken or weathered away.
Friable material is different. Touching it, knocking it or even air movement can release fibres. It can also spread: dust settles on surfaces, gets tracked through a house on shoes and clothes, and moves through roof spaces and wall cavities.
So the question is not only "is it asbestos?" but "how easily can the fibres get out?" That is what friability measures.
Friable vs non-friable at a glance
| Friable | Non-friable (bonded) | |
|---|---|---|
| What it is | Powder, or crumbles by hand pressure when dry | Fibres bound in cement, vinyl or resin |
| Fibre release | Easily, with little disturbance | Low while intact; higher when cut, broken or weathered |
| Typical examples | Loose-fill and sprayed insulation, pipe lagging, badly damaged sheeting | Fibro sheets, corrugated roofing, vinyl floor tiles, pipes |
| Who removes it in NSW | Class A licensed removalist | Class B or Class A licensed removalist, above small quantities |
| Controls | Enclosure, air monitoring, independent clearance | Wetting, removal intact where possible, wrapping, clearance |
Where friable asbestos is found
Friable asbestos is less common in houses than bonded fibro, but it does turn up — and it matters most when it does.
- Loose-fill insulation. Asbestos was blown into the roof spaces of some houses as insulation, mainly in the ACT and parts of NSW. NSW keeps a public register of affected properties.
- Sprayed insulation and fire protection, found mostly in older commercial and industrial buildings rather than houses.
- Pipe and boiler lagging — the wrapping on old hot-water pipes, boilers and heating systems.
- Some millboard, heater and stove linings, and insulation in old appliances.
- Some textured or sprayed ceiling finishes.
- Badly damaged bonded material — see below.
When bonded asbestos becomes friable
Non-friable does not mean permanently safe. Bonded asbestos can deteriorate to the point where it is treated as friable. Common causes include:
- Weathering. Decades of sun and rain erode the cement surface of roofing and cladding, leaving fibres exposed.
- Fire. Heat breaks down the cement matrix. Fire-damaged fibro is a common source of friable material.
- Hail and storm damage, which shatters sheets and scatters fragments.
- Water-blasting or pressure-cleaning asbestos roofs and walls, which strips the surface and spreads contaminated slurry. It should never be done.
- Demolition by machine without removal first, which crushes sheets and spreads fragments across the site.
- Contaminated soil, where broken fragments have been buried or left in the ground for years.
Whether damaged material has crossed the line from non-friable to friable is a judgement for a licensed asbestos assessor or removalist. If you are unsure, treat it as friable until someone qualified says otherwise.
Who can remove it
In NSW, asbestos removal is licensed through SafeWork NSW, and friability decides which licence is needed.
Class A licence. Required to remove friable asbestos, in any quantity. A Class A removalist can also remove non-friable asbestos.
Class B licence. Allows removal of non-friable asbestos, but not friable.
Friable removal is the most tightly controlled asbestos work there is. It typically involves:
- a written asbestos removal control plan and advance notice to the regulator
- an enclosure around the work area, often under negative air pressure
- decontamination facilities for workers
- air monitoring during the work by an independent licensed asbestos assessor
- a clearance inspection by a licensed asbestos assessor before the area can be reoccupied
The exact requirements depend on the job, and the removalist and assessor will set them out. What does not vary is that a homeowner should not attempt friable removal.
The rules on what a homeowner may do with small amounts of non-friable material are narrow and specific. Check with SafeWork NSW or a licensed asbestos assessor before touching anything, rather than relying on a general summary — including this one.
If you think you have found friable asbestos
- Stop work and leave the material alone.
- Keep people and pets away and close off the area if you can.
- Do not sweep, vacuum or hose it. An ordinary vacuum spreads fibres; hosing can carry them further.
- Avoid tracking it through the house. Change out of any clothing or shoes that may be contaminated.
- Call a licensed asbestos assessor or Class A removalist to inspect, sample and advise.
For material you are not sure about — damaged sheeting, old insulation, crumbling lagging — the first step is testing. Our guide on how to test for asbestos explains how samples are taken and analysed.
What it means for demolition
Friable asbestos changes the order and cost of a demolition more than anything else. It has to be identified in the survey, removed by a Class A removalist under controlled conditions, and cleared by an independent assessor before any demolition starts. Where bonded material has been damaged or buried, the contaminated area may also need testing and remediation.
A demolition licence does not authorise asbestos removal of any kind. On jobs arranged through this site, asbestos is always removed by a separately licensed removalist before the demolition crew arrives.
If you're on the Central Coast, we can arrange the survey, licensed removal and demolition in the right sequence, and quote it after a site inspection.
Where to go next
- Asbestos removal — how asbestos is surveyed and removed by licensed removalists before demolition.
- House demolition — the full demolition process, from approvals to a level block.
- Demolition cost guide — rough price bands, and why asbestos is priced as its own line.
Talk to someone who knows Coast blocks. Seven days, 6am–7pm.
Questions people ask before they commit
What does friable asbestos mean?
Friable asbestos is asbestos-containing material that is in powder form, or that can be crumbled, pulverised or reduced to powder by hand pressure when dry. Because the fibres are only loosely held, it releases them far more readily than bonded material.
Is fibro friable or non-friable?
Asbestos cement sheeting in sound condition is non-friable, because the fibres are bound in cement. Fibro that has been badly weathered, damaged by fire or hail, broken up or water-blasted can deteriorate to the point where it is treated as friable. A licensed assessor or removalist decides which applies.
Who can remove friable asbestos in NSW?
Only a removalist holding a Class A asbestos removal licence. Friable removal involves enclosures, air monitoring and independent clearance. A homeowner should never attempt to remove, sweep up or vacuum material that may be friable asbestos.
What should I do if I find damaged or crumbling asbestos?
Leave it alone, keep people and pets away, avoid walking through it and do not clean it up with a broom or ordinary vacuum. Contact a licensed asbestos assessor or Class A removalist, and check SafeWork NSW's guidance on what to do next.