Asbestos is a naturally occurring mineral once valued for its strength, heat resistance, and insulation properties. It was widely used in New Zealand homes and buildings before the 1990s, but today, it’s recognised as a serious health hazard when disturbed.
Knowing whether asbestos is present in your property is essential for protecting the health of occupants and ensuring compliance with safety regulations. That’s where asbestos testing comes in. This guide explains how asbestos testing is performed, what the process involves, and why it’s crucial for New Zealand property owners.
What is Asbestos and Why is Asbestos Dangerous?
What is asbestos?
Asbestos refers to a group of six naturally occurring silicate minerals made up of thin, microscopic fibres. In the past, it was used in products such as roofing materials, vinyl flooring, insulation, cement, and textured coatings due to its durability and resistance to fire.
Why is asbestos dangerous?
The problem arises when asbestos-containing materials (ACMs) become damaged, releasing fibres into the air. When inhaled, these fibres can lodge in the lungs and cause serious diseases such as:
- Asbestosis (lung scarring)
- Mesothelioma (a rare cancer)
- Lung cancer
Because asbestos fibres are invisible to the naked eye, the only safe way to determine their presence is through professional asbestos inspection and testing.
Why is Asbestos Testing Important in New Zealand?
In New Zealand, asbestos remains one of the leading causes of workplace-related diseases. The Health and Safety at Work (Asbestos) Regulations 2016 set strict standards for identifying and managing asbestos risks.
Asbestos testing is important because it:
- Protects occupants, contractors, and neighbours from exposure.
- Ensures compliance with health and safety regulations.
- Prevents costly contamination during renovations or demolitions.
- Helps buyers and property managers make informed decisions.
If your home was built or renovated before 2000, professional asbestos testing is strongly recommended before any structural changes are made.
When Should Asbestos Testing Be Done?
You should consider asbestos testing in the following situations:
Before Renovations or Demolition
Renovation work often disturbs materials that may contain asbestos, releasing fibres into the air. Testing before starting work helps identify risk areas.
Before Buying or Selling Property
Including asbestos testing as part of your home inspection or building inspection can prevent unpleasant surprises later and help with negotiations.
If You Suspect Asbestos Presence
If your building contains materials such as textured ceilings, old vinyl tiles, or cement sheeting, it’s best to get an asbestos inspector to check it professionally.
During Property Maintenance
Property managers and owners of commercial buildings are legally obligated to identify asbestos and maintain an asbestos management plan.
Types of Asbestos Testing Methods
Understanding how asbestos testing is performed starts with knowing the different testing methods used by professionals. Each method serves a specific purpose depending on the material or environment being tested.
Visual Inspection and Sampling
An asbestos inspector first conducts a thorough visual assessment of the property, identifying areas where asbestos-containing materials may be present.
Samples are carefully collected from suspected materials, such as insulation, cement boards, or flooring, and sealed in airtight containers for testing. Proper PPE (personal protective equipment) and containment measures are used to prevent fibre release.
Airborne Testing for Asbestos Fibres
In some cases, especially after demolition or asbestos removal, air monitoring is performed.
This test involves drawing air through a special filter, which is then analysed under a microscope to detect the presence and concentration of airborne asbestos fibres.
Bulk Sampling
Bulk sampling involves removing small pieces of material suspected of containing asbestos. The sample is labelled and sent to an accredited laboratory for detailed analysis.
This is the most common and reliable method used to determine asbestos presence in building materials.
Laboratory Analysis
Once the samples are collected, they’re analysed using polarised light microscopy (PLM) or transmission electron microscopy (TEM) to identify the type and concentration of asbestos fibres.
Lab results indicate whether asbestos is present, and if so, what type: chrysotile (white asbestos), amosite (brown asbestos), or crocidolite (blue asbestos).
Steps Involved in Asbestos Testing and Removal
If you’re wondering how asbestos testing is performed, here’s a step-by-step breakdown of the typical process used by New Zealand inspection professionals.
Step 1: Hiring an Accredited Asbestos Inspector
Start by engaging a professional inspection service such as Jim’s Building Inspections.
Our team includes qualified inspectors who can identify potential asbestos risks and safely collect samples for accredited lab testing. Always ensure your chosen provider follows WorkSafe NZ guidelines.
Step 2: Asbestos Testing Process
During the inspection, the asbestos inspector will:
- Identify potential asbestos-containing materials.
- Take samples using safe handling procedures.
- Seal and label the samples for transportation.
- Send them to an accredited laboratory for analysis.
The process is designed to be minimally invasive while ensuring accuracy and safety.
Step 3: Understanding the Results
Once the lab results are returned, you’ll receive a detailed asbestos testing report outlining:
- The type of asbestos detected (if any)
- The material and location
- The condition and level of risk
- Recommended next steps (e.g., monitoring or removal)
These findings help you decide whether further management or removal is necessary.
Step 4: Asbestos Removal (If Required)
If asbestos is confirmed, licensed asbestos removalists must handle the removal work. This involves setting up containment zones, using HEPA filtration systems, and following strict disposal procedures under WorkSafe NZ regulations.
Step 5: Final Clearance Testing
After removal, a clearance inspection and air monitoring are carried out to ensure that no asbestos fibres remain. Only after the property passes this test can the area be safely reoccupied.
Is Asbestos Testing Mandatory in New Zealand?
While not every property is legally required to undergo asbestos testing, it becomes mandatory in certain situations:
- For commercial buildings built before 2000.
- Before renovation or demolition work that could disturb ACMs.
- When developing an asbestos management plan.
The Health and Safety at Work (Asbestos) Regulations 2016 require building owners and employers to identify and manage asbestos risks in workplaces. Residential homeowners, while not legally required, are strongly encouraged to test for safety reasons.
How Can Jim’s Building Inspections Help?
Jim’s Building Inspections provides professional asbestos inspection and testing services across New Zealand. Our inspectors are trained to identify potential asbestos risks and collect samples safely for accredited laboratory analysis.
We deliver:
- Accurate, lab-tested results
- Detailed asbestos survey reports
- Guidance on safe management or removal
- Support for both residential and commercial properties
Our goal is to help you make informed, safe decisions about your property. Whether you’re purchasing a home or managing a commercial building, we’ll ensure your property complies with New Zealand safety standards.
Visit our Asbestos Testing page to learn more or request a quote.
Costs of Asbestos Testing in New Zealand
The asbestos testing cost can vary depending on the property’s size, number of samples, and complexity of the inspection.
| Property Type | Typical Cost Range |
| Residential property (1–2 samples) | $200 – $400 |
| Full asbestos survey (multiple samples) | $600 – $1,200 |
| Airborne fibre testing | $300 – $800 |
| Clearance testing (after removal) | $250 – $600 |
While prices differ, professional testing provides invaluable peace of mind and can prevent much higher remediation costs if contamination spreads undetected.
How to Choose the Right Asbestos Testing Service
When selecting an asbestos testing service, consider the following:
- Accreditation: Ensure samples are analysed by an IANZ-accredited laboratory.
- Experience: Choose a company familiar with New Zealand’s building materials and safety regulations.
- Comprehensive service: Look for a provider offering both asbestos inspection and guidance on next steps.
- Transparency: Request a written report with clear findings and recommendations.
- Reputation: Check reviews and client feedback to ensure reliable service.
Jim’s Building Inspections meets all these standards, providing trusted and transparent asbestos testing solutions across the country.
Conclusion
Asbestos testing is a crucial step in ensuring the safety, compliance, and long-term value of your property. Understanding how asbestos testing is performed helps homeowners and business owners make informed decisions about managing asbestos risks.
Professional testing not only safeguards your health but also ensures you comply with WorkSafe New Zealand regulations. With expert inspectors and accredited laboratory partnerships, Jim’s Building Inspections provides reliable and efficient asbestos testing services you can trust.
FAQs
If your building was constructed before 2000, there’s a good chance it contains asbestos materials. Only professional testing can confirm its presence.
Yes, it is mandatory for workplaces and commercial buildings under the Health and Safety at Work (Asbestos) Regulations 2016. For residential properties, testing is recommended but not legally required.
No. Asbestos sampling should only be carried out by a qualified inspector using safety equipment. DIY sampling can release hazardous fibres and increase exposure risk.
Most inspections take 1–2 hours, and laboratory analysis is usually completed within 2–5 business days.
Prices typically range from $200 for single-sample testing to over $1,000 for comprehensive asbestos surveys, depending on property size and scope.
Yes. Accredited laboratories use advanced microscopy methods to detect all six types of asbestos fibres, including chrysotile, amosite, and crocidolite.
If asbestos is present but in good condition, retesting or reinspection every 2–5 years is recommended, or sooner if materials are disturbed.
Asbestos removal must be carried out by a licensed professional following WorkSafe NZ safety procedures. Never attempt removal yourself.