Removing asbestos cement internal wall linings is not a simple DIY job in New Zealand — and in most cases, it is legally restricted work that must be carried out by a licensed asbestos removalist. Even in a small room, disturbing asbestos-containing materials (ACM) without the right controls can release dangerous fibres that cause serious, irreversible lung disease. Before you pick up a crowbar, read this carefully.
Why Asbestos Cement Wall Linings Are a Serious Risk
Asbestos cement (sometimes called "fibrous cement" or "AC sheet") was widely used in NZ homes built before the mid-1980s as an internal wall and ceiling lining. Common brand names included Hardiflex and Villaboard — though today's versions of these products from James Hardie are asbestos-free. Older sheets typically contain 5–15% chrysotile (white) asbestos bonded into the cement matrix.
When the material is in good condition and left undisturbed, the risk is relatively low. The danger rises sharply when sheets are cut, drilled, broken, sanded, or levered off walls — all actions that release fine asbestos fibres into the air. These fibres are invisible to the naked eye and can remain airborne for hours.
What NZ Law Says About Asbestos Removal
The WorkSafe NZ regulations under the Health and Safety at Work (Asbestos) Regulations 2016 set out clear rules:
- Class A asbestos removal covers friable (crumbly) asbestos and any work involving more than 10 square metres of non-friable (bonded) asbestos cement. This must be done by a licensed Class A removalist.
- Class B asbestos removal covers non-friable ACM up to 10 square metres in total. This must be done by a licensed Class B (or Class A) removalist.
- Homeowner exemption: The regulations include a limited exemption that may allow a homeowner to remove non-friable ACM from their own home without a licence in certain circumstances. Check directly with WorkSafe NZ to confirm the precise conditions that apply. However, this exemption is narrow and does not remove your duty to manage the risk safely.
Important: Even if you technically fall within the homeowner exemption, WorkSafe strongly advises against DIY asbestos removal unless you fully understand the requirements. The exemption does not mean it is safe or straightforward — it simply means it may not be illegal in very limited circumstances. Check directly with WorkSafe NZ if you are unsure whether your situation qualifies.
The Risks of Getting It Wrong
Asbestos fibres cause mesothelioma, asbestosis, and lung cancer — diseases that can take 20–40 years to develop after exposure. There is no safe level of exposure. Beyond your own health, you risk:
- Contaminating your home and exposing family members
- Creating a costly decontamination problem for future owners
- Potential legal liability if others are harmed
- Fines for breaching health and safety regulations
BRANZ and WorkSafe both publish guidance confirming that professional removal is the safest and most reliable approach.
How to Identify Asbestos Cement Linings
You cannot identify asbestos by sight alone. If your home was built or renovated before 1990, assume any cement-based wall lining sheet may contain asbestos until proven otherwise. The only reliable way to confirm is to have a sample tested by an accredited laboratory. A qualified asbestos assessor can take samples safely and arrange testing — do not attempt to sample the material yourself without proper PPE and training.
What a Licensed Asbestos Removalist Will Do
A professional removalist will:
- Conduct or arrange an asbestos survey and air monitoring
- Set up containment and negative pressure if required
- Wet-down sheets to suppress fibre release during removal
- Remove sheets as whole panels where possible to minimise breakage
- Double-bag and label waste as hazardous material
- Arrange disposal at an approved NZ landfill that accepts asbestos waste
- Provide a clearance certificate confirming the area is safe
Disposal requirements vary by region — your local council can advise on approved facilities.
Building Consent Considerations
Removing internal wall linings may also trigger building consent requirements depending on what's behind the wall (e.g., structural elements, plumbing, or electrical wiring). Schedule 1 of the Building Act 2004 lists some exemptions for minor work, but these do not override health and safety obligations around asbestos. Always check with your local council before starting any removal work. You can find general guidance at MBIE Building Performance.
When to Call a Professional
Call a licensed asbestos removal specialist if:
- The total area of ACM meets or exceeds the Class A threshold (check with WorkSafe NZ for the current applicable limits)
- The sheets are damaged, crumbling, or water-affected
- You are not confident in identifying or safely handling the material
- Anyone in the household is vulnerable (children, elderly, or immunocompromised)
- You simply want the peace of mind that comes with a professional clearance certificate
You can find qualified, local asbestos removal specialists on tradedirectory.co.nz — look for contractors who hold a current WorkSafe-issued removal licence and can provide references.
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