In New Zealand, removing asbestos — even from a simple shed roof — is governed by strict health and safety regulations. The short answer is: it depends on how much asbestos you're removing and whether it's friable or non-friable, but in many cases notification to WorkSafe NZ is legally required, and some work must only be done by a licensed asbestos removalist. Getting this wrong can put your health, your family's health, and your legal standing at serious risk.
Why Asbestos Is So Dangerous
Asbestos fibres, when disturbed, become airborne and can be inhaled deep into the lungs. Long-term exposure is linked to serious and often fatal diseases including mesothelioma, asbestosis, and lung cancer. Older corrugated roofing sheets — commonly called fibro or super six — were widely used on NZ sheds and farm buildings up until the late 1980s and frequently contain asbestos. Even if the sheets look intact, cutting, drilling, or breaking them releases dangerous fibres.
WorkSafe NZ is the primary regulator for asbestos work in New Zealand and sets out the rules under the Health and Safety at Work (Asbestos) Regulations 2016.
The Two Classes of Asbestos Removal
NZ law divides asbestos removal into two classes based on risk:
| Class | Type of Work | Who Can Do It | WorkSafe Notification Required? |
|---|---|---|---|
| Class A | Friable asbestos (crumbly, easily broken) or bonded asbestos over 10 m² | Licensed Class A removalist only | Yes — at least 5 working days before work starts |
| Class B | Bonded (non-friable) asbestos up to 10 m² | Licensed Class B (or A) removalist | Yes — at least 24 hours before work starts |
Bonded asbestos (like corrugated roofing sheets) is the most common type found on shed roofs. It is held in a cement or resin matrix, which makes it less immediately dangerous than friable asbestos — but it still poses a serious risk if broken or cut.
Can a Homeowner Do It Themselves?
This is where many people are surprised. Under the Health and Safety at Work (Asbestos) Regulations 2016, homeowners working on their own domestic premises are not automatically exempt from the rules. However, there is a limited provision: a homeowner may remove bonded asbestos from their own home (including outbuildings like sheds) if the total area is no more than 10 m² — but this is still classified as Class B work, and WorkSafe must still be notified at least 24 hours beforehand.
So to be absolutely clear: you cannot remove asbestos from your shed roof without notifying WorkSafe NZ, even for small jobs. Failure to notify is a breach of the regulations and can result in significant fines.
If your shed roof is larger than 10 m², or if the asbestos is friable, you must use a licensed Class A asbestos removalist — this is not optional.
How to Notify WorkSafe NZ
Notification is done through the WorkSafe NZ website. You'll need to provide details including:
- The location and description of the work
- The type and estimated quantity of asbestos
- The planned start date and duration
- Your contact details
Always check the WorkSafe website directly for the current notification form and requirements, as processes can be updated.
Safe Removal Practices for Homeowners (Class B, Under 10 m²)
If you are legally permitted to do the work yourself, you must still follow strict safety procedures:
- Do not use power tools — no angle grinders, drills, or saws. Use hand tools only.
- Wet the sheets thoroughly before and during removal to suppress dust.
- Wear a P2 or P3 respirator (not a dust mask), disposable coveralls, gloves, and eye protection.
- Never break sheets — keep them whole where possible.
- Double-bag all waste in heavy-duty polythene bags labelled as asbestos waste.
- Dispose of waste only at a council-approved disposal facility — contact your local council to find the nearest site, as not all transfer stations accept asbestos.
- Shower and change clothes immediately after the work.
Disposing of Asbestos Waste
Asbestos waste cannot go in your general rubbish or skip bin. Contact your local council for approved disposal sites and any specific local requirements. Some councils have particular drop-off days or procedures. Always transport asbestos waste in a sealed vehicle or covered trailer.
Building Consent Considerations
Replacing a shed roof may also require a building consent, depending on the scope of work and your local council's rules. Schedule 1 of the Building Act 2004 lists some exemptions for minor work, but these exemptions do not override asbestos regulations. Always check with your local council before starting. You can find general guidance at MBIE Building Performance.
When to Call a Professional
Honestly, for most homeowners, hiring a licensed asbestos removalist is the safest and most straightforward option. A professional will:
- Confirm whether the material actually contains asbestos (testing may be needed)
- Handle all WorkSafe notifications on your behalf
- Use correct PPE and containment procedures
- Arrange compliant disposal
- Provide a clearance certificate where required
If your shed roof is over 10 m², the asbestos is damaged or friable, or you have any doubt at all, do not attempt this yourself. You can find qualified, local asbestos removal specialists on tradedirectory.co.nz.
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