Why asbestos is still a real issue in New Zealand homes If your home was built before the late 1980s, there’s a decent chance it contains asbestos somewhere. In New Zealand, asbestos was widely used in roofing, cladding, backing boards, vinyl flooring, textured ceilings, insulation around pipes, and older fencing and garage linings. Even though asbestos was phased out, it was still present in many homes built up to the mid-1990s in some products.
The important thing to understand is that asbestos is not always dangerous if it’s intact and left alone. The risk rises when it’s cut, drilled, sanded, broken, water-damaged or weathered. That’s when fibres can be released into the air and inhaled.
For homeowners, the key question is not “Is there asbestos?” but “Has it become damaged, disturbed, or likely to be disturbed by planned work?” If the answer is yes, it’s time to call an asbestos removal specialist.
The clearest signs you should stop and get specialist advice Some warning signs are obvious, while others are easy to miss until a renovation starts.
1) Your home was built before asbestos was phased out Age is one of the biggest clues. If your house, garage or sleepout was built or altered before the 1990s, treat suspect materials with caution. Common places asbestos may be found include:
- corrugated roofing and eaves - soffits and cladding sheets - old vinyl floor tiles and vinyl sheet backing - textured ceilings and wall coatings - hot-water cylinder lagging and pipe insulation - wet area wall linings - fencing, garages, sheds and flat-roof outbuildings
If you’re unsure, don’t rely on appearance alone. Asbestos products can look like plain fibre-cement or older building board. A specialist can advise whether sampling or removal is needed.
2) You’ve found damaged, crumbling or weathered material A material that’s intact is one thing. A material that’s cracked, chipped, flaking or friable is another.
Call a specialist if you notice:
- broken roof sheets or shed panels - crumbling garage linings - chalky, soft or powdery insulation - damaged textured ceilings - loose debris around old flues or pipes - corrosion, water stains or delamination on suspect boards
In NZ’s damp coastal areas and places with big temperature swings, weathered asbestos-cement can deteriorate faster. After heavy rain, wind events or a rough winter, older outdoor products can become more fragile and more likely to release fibres when touched.
3) You’re planning renovations, demolition or DIY that could disturb it This is one of the most common reasons homeowners need help. Drilling, cutting, sanding, breaking or pulling out suspect material can release fibres even if the product looked fine beforehand.
Typical projects that can trigger the need for asbestos removal or assessment include:
- bathroom or laundry renovations - kitchen strip-outs - removing old vinyl flooring or underlay - replacing roofing or gutters - installing heat pumps, alarms, lights or extraction fans through old linings - opening walls, ceilings or service cavities - extending or recladding a house
If you are about to use an angle grinder, reciprocating saw, drill or sander near older materials, stop and check first. A small job can become a contamination job very quickly.
4) You can see dust, debris or fragments around suspect material Visible dust is a warning sign, especially if it appears after minor disturbance, a roof leak, repair work or storm damage.
Look for:
- powdery dust in ceiling cavities or on window sills - fragments under eaves or around roofing - debris near old hot-water cylinder cupboards or service pipes - broken pieces after removing nails or fixings - dust from old vinyl or backing boards in renovation areas
Do not sweep, vacuum with a standard household vacuum, or blow it away with compressed air. That can spread fibres around the home.
5) Water damage, fire damage or storm damage has affected the area Water damage can weaken asbestos-containing materials, and fire can make them more friable. Storms can crack roof sheets, loosen fixings and scatter debris.
After a leak, flood, fire or severe wind, get specialist advice if suspect materials have been affected. In many cases, the issue is not just the original asbestos material but also the mess it has made in nearby spaces.
6) Tradespeople have raised concerns during an inspection or quote Builders, roofers, plumbers, electricians and painters often spot suspect materials before a homeowner does. If a tradie says “this might be asbestos”, take it seriously.
Do not ask them to keep going unless they are appropriately trained and the work is clearly within their scope. If there is any doubt, pause the job and get an asbestos assessment.
7) You can’t safely confirm what the material is If a material is in a spot where it will be cut, disturbed or removed, uncertainty alone is reason enough to call a specialist. Guessing is not a sensible risk when it comes to asbestos.
Common home situations where homeowners delay too long Many people delay because the material “looks fine” or the job seems too small to matter. That’s where problems often start.
| Situation | Why it matters | What to do | |---|---|---| | Old vinyl flooring in a hallway or kitchen | Vinyl sheet backing and adhesive can contain asbestos in older homes | Stop sanding or ripping it up; get it tested or assessed first | | Crack in an exterior wall board | Weathering can make asbestos-cement brittle | Avoid pressure washing, sanding or patching until assessed | | Roof leak in a garage or sleepout | Water can weaken sheets and spread debris | Keep the area closed off and arrange specialist advice | | Bathroom renovation | Behind tiles or linings may be suspect board | Do not start demolition until materials are checked | | New light fitting or heat pump install | Cutting through ceiling linings may release fibres | Tell the installer the house age and ask for asbestos-safe procedures |
What happens if you delay Delaying can cost you more than peace of mind.
Health risk increases when materials are disturbed Asbestos-related disease is linked to inhalation of fibres over time. You may not notice any immediate symptoms after exposure, which is one reason people underestimate the risk. The danger is cumulative and serious. There is no safe level of careless exposure.
A small job can turn into a larger, more expensive one If the material is left until after demolition starts, fibres can spread into spaces that were meant to stay clean. That can mean:
- extra containment and decontamination - more labour hours - specialist cleaning of adjacent areas - delays to renovation schedules - replacement of contaminated insulation, flooring or linings
In practice, a planned removal is usually far simpler than an emergency clean-up after someone has already broken into the material.
You may create compliance and disposal problems In New Zealand, asbestos work is tightly controlled by WorkSafe guidance and the Health and Safety at Work Act framework. Certain asbestos removal work must be carried out by a licensed asbestos removalist, particularly larger or higher-risk jobs. Even for smaller work, the contractor should follow the right controls, notify where required, and dispose of asbestos waste correctly at approved facilities.
If you delay and then disturb material yourself, you risk making the site harder to clean, harder to prove safe, and potentially more expensive to dispose of.
It can affect future renovation and resale plans If asbestos is discovered late in a project, it can push back trades, affect council-related work sequencing, and complicate property sales disclosures. Many buyers in New Zealand now ask more questions about cladding, roofing, flooring and renovation history, especially in older homes.
When to call a specialist straight away You should not wait if any of the following apply:
- the material is damaged, friable or weathered - renovation, demolition or drilling is planned - the home is pre-1990 and the material is in a likely asbestos location - a leak, storm, fire or impact has affected suspect material - you have already disturbed it and there is dust or debris - children, tenants or pets may be exposed to the area
If you only do one thing, do this: stop work in the area and keep people out until it has been assessed.
What a good asbestos removal specialist will do A proper specialist does more than just take material away. Expect them to:
- inspect the suspect material and advise on likely risk - arrange or recommend laboratory testing where needed - explain whether removal, encapsulation or leaving it in place is the best option - set up containment, signage and decontamination controls - use appropriate PPE and dust suppression methods - bag, seal and dispose of asbestos waste legally - provide documentation for your records
For larger jobs, the contractor should be licensed where required and should be able to explain how they manage notifiable or higher-risk work. Ask for written quotes and a clear scope so you know exactly what is included.
How to choose the right person for the job Not every general builder is the right person to handle suspect asbestos. Before hiring, check:
- relevant asbestos removal licence if the work requires it - insurance, including public liability cover - experience with homes similar to yours - how they contain dust and protect the rest of the house - where they take the waste and how they document disposal - whether the quote includes testing, removal, cleaning and certification if needed
It is smart to get at least two or three written quotes. The cheapest price is not always the best value if it leaves out containment, clean-up or proper disposal.
What homeowners can do while waiting for help Until the specialist arrives:
- keep children, pets and other household members away - close doors and limit movement through the area - do not sweep, vacuum, sand or hose down suspect material - avoid touching, drilling or removing anything nearby - if possible, switch off fans or air movement that may spread dust - tell any other trades on site to stop work in the affected area
If the material is outside, try to prevent further disturbance from wind, people or animals, but do not attempt a DIY fix unless a professional has advised it is safe and appropriate.
The bottom line Call an asbestos removal specialist as soon as you suspect asbestos is damaged, likely to be disturbed, or already has been. In New Zealand homes, the risk is often hidden until renovation, weather damage or a routine trade job exposes it.
The earlier you act, the cheaper, safer and cleaner the job is likely to be. Delaying can turn a manageable issue into a contaminated site, a bigger bill and unnecessary exposure for your household.
If you’re unsure, stop work, keep the area clear and get a specialist opinion before you go any further.