Asbestos exposure is often called a “silent killer” — and for good reason. You can’t see, smell, or taste asbestos fibres when they’re in the air. But once inhaled, they can lodge deep in the lungs and cause serious health issues — often decades later.
Whether you’re renovating an old home, managing a property, or simply curious about the risks, this guide explains the dangers of asbestos and how to protect yourself and others.
How Do People Get Exposed to Asbestos?
Asbestos becomes a health risk when it’s disturbed — through cutting, drilling, sanding, or breaking materials that contain it. This releases tiny, sharp fibres into the air, which can be inhaled without even realising.
In New Zealand, exposure often happens during:
- DIY home renovations
- Demolition of older buildings
- Trades work (plumbing, electrical, roofing, flooring)
- Poorly managed asbestos removal
Once inhaled, those fibres can stay in the body for years — and that’s where the danger lies.
Who’s Most at Risk?
- Tradespeople and contractors working in older homes and buildings
- DIYers undertaking renovations without asbestos checks
- Occupants of buildings where asbestos has been disturbed
- Family members of exposed workers (via contaminated clothing or tools)
What Are the Health Effects of Asbestos?
Asbestos doesn’t cause immediate symptoms. In fact, most health issues take 10–40 years to develop after exposure. But the long-term consequences can be devastating.
Here are the most serious asbestos-related diseases:
- Mesothelioma
A rare but aggressive cancer affecting the lining of the lungs or abdomen. It’s almost exclusively caused by asbestos exposure. - Lung Cancer
Asbestos exposure increases the risk of lung cancer — especially for smokers. The risk rises with the level and duration of exposure. - Asbestosis
A chronic lung condition caused by heavy, prolonged exposure to asbestos. It leads to scarring of lung tissue, causing shortness of breath, coughing, and fatigue. - Pleural Thickening & Plaques
These are non-cancerous changes in the lining of the lungs but can still affect breathing and quality of life.
They also signal past exposure and increased risk of further complications.
Is There a Cure for Asbestos-Related Diseases?
Unfortunately, there is no cure for mesothelioma or asbestosis. Treatment options are limited, and early detection is difficult. That’s why prevention and awareness are critical.
If you believe you’ve been exposed to asbestos, talk to your GP. They may recommend a medical history review, lung function tests, or ongoing monitoring.
Can Asbestos Be Safe If Left Alone?
In some cases — yes. Non-friable asbestos (solid and undamaged) is often low-risk when it’s left undisturbed. But the moment you drill into a wall, rip up old lino, or cut into eaves, the risk increases dramatically.
That’s why asbestos testing is the first and safest step before starting any work on an older property.
How to Stay Safe
- Don’t disturb suspicious materials in older homes
- Get professional asbestos sampling or a survey before renovations
- Never sand, cut, or drill asbestos-containing products
- Always use WorkSafe NZ licensed professionals for removal www.asbestosservices.co.nz
- Wear PPE and follow safety procedures if you’re in a high-risk job