Asbestos Roof Removal: The Complete Guide for NZ Homeowners and Building Owners

Your ageing roof might be hiding something more serious than a few leaks. Thousands of New Zealand properties — homes, commercial buildings, schools, and sheds — were roofed with asbestos cement sheeting before the 1980s. If your roof predates 1990 and shows signs of age,asbestos remediation damage, or you are planning a re-roof, asbestos roof removal is likely in your future. Here is everything you need to know to do it safely, legally, and without unnecessary disruption.

Does Your Roof Contain Asbestos? How to Know

New Zealand has a significant legacy asbestos roofing issue. Asbestos cement was the dominant roofing material for New Zealand homes, commercial buildings, schools, and agricultural structures from the 1940s through to the mid-1980s. Its durability and fire resistance made it attractive — and for decades it was considered safe. The health risks only became fully understood later.

The most common asbestos roofing products in NZ include:

Corrugated asbestos cement sheets — often called “Super Six” or “Hardiflex Super Six” (though Hardiflex has since manufactured non-asbestos products). These large corrugated sheets were used on residential, commercial, and agricultural buildings across NZ.

Flat asbestos cement sheets — used both as roofing and as wall cladding. Flat sheets were commonly used on older NZ homes as soffit linings and fascia boards as well as roofing.

Asbestos cement roof tiles — some older residential properties in NZ were roofed with flat or profiled asbestos cement tiles rather than the corrugated sheet style.

If your property was built or re-roofed before 1990, there is a meaningful chance your roof contains asbestos-containing materials. The only reliable way to confirm is laboratory testing — visual identification alone is not sufficient.

Signs that suggest your roof may contain asbestos:

• Corrugated sheeting with a chalky, slightly weathered surface
• Sheeting that appears relatively thick compared to modern metal roofing
• Green or grey-toned cement-like panels
• A building permit or council file that predates 1990

If any of these apply, contact AR Plus for a site inspection and testing before any repair or roofing work begins.

Why an Ageing Asbestos Roof Is a Growing Risk

An asbestos roof that is intact and in good condition poses relatively low risk — the fibres are bound within the cement matrix. But asbestos cement roofing does not stay intact forever.

Weather exposure gradually breaks down the surface of asbestos cement sheets. UV radiation, rain, freeze-thaw cycles, and biological growth (moss, lichen) all contribute to surface deterioration. As the cement matrix breaks down, asbestos fibres can become exposed and — particularly during rain — can be washed into gutters, downpipes, and the soil around the building. More critically, damaged or friable areas of asbestos cement can release airborne fibres when disturbed by wind, rain, or attempted repairs.

Attempted repairs are where most unintended asbestos exposure occurs. Drilling, cutting, grinding, or pressure-washing asbestos cement sheets releases fibres directly into the air. Without the correct PPE and containment, this exposure is immediate and significant.

The safe approach when you identify a damaged or deteriorating asbestos roof is to avoid disturbing it further and contact a licensed asbestos removal specialist.

Asbestos Roof Repair vs Removal: Which Option Is Right?

This is one of the most common questions property owners ask when asbestos roofing is identified on their building. The answer depends on several factors.

When Encapsulation or Sealing Is Appropriate

If an asbestos cement roof is in good condition — no cracking, no surface deterioration, no physical damage — and you are not planning any roofing work in the near future, a properly applied asbestos sealant can encapsulate the surface and reduce the risk of fibre release. This is a management approach, not a permanent solution.

Sealants must be applied by trained personnel using appropriate PPE. Even this maintenance task should not be carried out by unlicensed individuals on an asbestos-containing roof.

When Full Asbestos Roof Removal Is the Right Choice

Full removal is the right choice when:

• The roof is deteriorating, cracked, or physically damaged
• You are planning a re-roof regardless of the asbestos content
• The asbestos roof is affecting property value or sale
• The risk profile of the material has been assessed as requiring removal
• Moss and lichen growth has significantly degraded the surface

Once removed, the issue is permanently resolved — and a new roof can be installed with full confidence in the substrate.

AR Plus completed a 200m² Super Six asbestos roof removal from a commercial factory building in just two days, followed by a full environmental vacuum of the site — with no delays to the subsequent re-roofing schedule. That is the standard they bring to every project.

The Asbestos Roof Removal Process: What AR Plus Does

AR Plus manages asbestos roof removals end-to-end. Here is what the process looks like:

Site Inspection and Testing

The first step is always a site inspection. AR Plus visits the property, assesses the roofing materials, and arranges laboratory testing if no existing asbestos survey is available. Testing confirms the presence of asbestos and identifies the type and condition of the material — which determines the removal method required.

Removal Planning

Once the testing results are confirmed, AR Plus prepares a removal plan that covers containment measures, PPE requirements, work procedures, access and scaffolding requirements, waste management, and timeline. Every asbestos roof removal is planned before any work begins.

Containment and Safe Removal

The work area is set up with appropriate containment to prevent asbestos dust or debris from spreading to adjacent areas. AR Plus operatives use full personal protective equipment — respiratory protection, disposable suits, gloves, and boots — throughout the removal.

Asbestos cement sheets are carefully removed, avoiding breakage where possible, and immediately placed in double-bagged, labelled asbestos waste bags. The entire removal area is vacuumed using HEPA-filtered vacuum equipment on completion.

Independent Clearance

An independent clearance inspection is arranged — conducted by an accredited third party, not AR Plus themselves. This ensures an unbiased assessment that the area is free of asbestos contamination before any subsequent roofing work proceeds.

Waste Disposal

All asbestos waste is transported by AR Plus to an approved asbestos landfill in compliance with NZ environmental regulations.

Reinstatement Support

AR Plus has established relationships with reputable roofing companies throughout the central North Island, making it straightforward to coordinate your new roof installation immediately following the clearance of your asbestos removal.

Working Safely at Height During Asbestos Roof Removal

Asbestos roof removal carries two overlapping safety challenges: the asbestos hazard itself, and the inherent risks of working at height on older, potentially fragile roofing structures.

AR Plus’s team is experienced in both. They know how to assess the structural integrity of ageing asbestos cement roofing before stepping onto it, asbestos remediation how to set up safe access systems, and how to carry out the removal without creating unnecessary risk through the work process itself.

This dual expertise — asbestos safety and working at height — is what makes specialist asbestos roofing contractors the only appropriate choice for this type of work. A general roofing contractor without asbestos expertise, or an asbestos specialist without roofing experience, does not cover both dimensions safely.

Asbestos Roof Removal Coverage: Where AR Plus Works

AR Plus provides licensed asbestos roof removal across the central North Island, including Tauranga, Bay of Plenty, Waikato, Coromandel, Rotorua, Taupo, Gisborne, and the King Country. Their two branches — in Tauranga and Rotorua — give them strong coverage across this region.

Conclusion

Asbestos roof removal is not a DIY project, a job for an unlicensed handyman, or something to leave unaddressed if your asbestos roof is deteriorating. It requires licensed professionals with the right equipment, proper containment, documented procedures, and independent clearance at completion.

AR Plus has been removing asbestos roofing safely across the central North Island since 1995. Their Class A and Class B licences, SiteWise Gold certification, and 30 years of experience make them the trusted specialist for residential and commercial asbestos roof removal throughout Tauranga, Bay of Plenty, Waikato, and beyond.

Get a free site inspection and quote at arplus.nz.

❓ FAQ — Asbestos Roof Removal

Q1: How do I know if my roof contains asbestos? The only reliable confirmation is laboratory testing of a sample from the roofing material. Visually, corrugated or flat cement sheets on buildings built before 1990 are strong indicators. AR Plus can arrange testing as part of a site inspection.

Q2: Can I repair an asbestos cement roof myself? No. Any disturbance of asbestos-containing material — including drilling, cutting, or pressure washing — must be carried out by appropriately licensed and trained contractors. DIY disturbance of asbestos roofing is both illegal for quantities above 10m² and a direct health risk.

Q3: How much does asbestos roof removal cost in NZ? Cost depends on the roof area, accessibility, the condition of the material, and the scope of reinstatement required. AR Plus provides free, no-obligation site inspections and detailed quotes. Contact them directly for pricing specific to your property.

Q4: Do I need to vacate my property during asbestos roof removal? Depending on the scope and type of asbestos involved, occupants may need to vacate during the work period and until independent clearance is confirmed. AR Plus will advise on specific requirements during the site inspection.

Q5: Can AR Plus coordinate my new roof installation after asbestos removal? Yes. AR Plus has established relationships with reputable roofing companies across the central North Island and can coordinate a seamless handover from asbestos removal to new roof installation.