The HSE position
HSE requires an asbestos licence for higher-risk work. This includes work on asbestos coatings and higher-risk work on asbestos insulation and AIB where the regulatory conditions for exemption are not met. Examples include sprayed coatings, work likely to disturb pipe lagging, loose-fill insulation, asbestos millboard and major or non-short-duration work on AIB.
Some work does not require a licence but must still be notified and brings additional requirements including designated work areas, medical surveillance and health records. The decision depends on the task, the ACM and its condition. Examples can include substantially damaged asbestos cement, short-duration removal of AIB as part of refurbishment, minor work on damaged asbestos insulation and some large-scale textured-coating removal.
Lower-risk work may be non-licensed where exposure is sporadic and low intensity and the relevant legal conditions are met. HSE examples include careful intact removal of sound asbestos cement, work on many firmly bonded products such as floor tiles and bitumen materials, and certain tightly controlled minor AIB tasks.
What does that actually mean?
Do not start with the question “what colour asbestos is it?” Start with: what is the material, what condition is it in, and what are you going to do to it?
A laboratory result saying chrysotile does not make an insulating board low risk. Chrysotile AIB is still AIB and chrysotile thermal insulation is still asbestos insulation. Conversely, an old asbestos-cement product may contain crocidolite or amosite and still be asbestos cement.
The matrix matters. Fibres locked into a hard cement, resin or bitumen matrix behave differently when handled from fibres in a more friable insulation, coating or insulating board. Then the method matters again: carefully unscrewing and lowering an intact cement sheet is a different proposition from dropping the roof and smashing the sheets on the floor.
Non-licensed does not mean unregulated, harmless or DIY by default. It means an HSE asbestos licence is not required for that particular work when the legal conditions are satisfied. The people doing it still need the right competence, training, risk assessment, controls, PPE/RPE and waste arrangements.
A few real-world comparisons
Sound asbestos-cement roof sheets: careful removal intact can normally be non-licensed. Smash or substantially break badly damaged sheets and the classification and controls can change.
AIB: most significant removal is licensed. HSE does allow specific minor/short-duration work to fall outside licensing where the risk assessment and conditions support it; some of that work is NNLW.
Pipe lagging / thermal insulation: inherently more friable and capable of substantial fibre release. Removal or disturbance is generally licensed, with only limited minor short-duration work potentially falling into NNLW.
Textured coatings, floor tiles, bitumen and other firmly bonded products: many tasks are non-licensed, but the method and condition still matter.
Related: ACM definitions · Common questions · Sampling & verification
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