Guide to Asbestos Roof Removal in New Zealand: Risks, Regulations, and Solutions
Understanding Asbestos in New Zealand Buildings
Asbestos, a naturally occurring mineral once prized for its durability, heat resistance, and insulating properties, was widely used in New Zealand’s construction industry from the 1930s to the late 1980s. During this period, asbestos was incorporated into a vast array of building materials, including:
- Roofing and cladding (asbestos cement sheets like “Super Six,” Decramastic or pressed metal tiles, and shingles)
- Ceilings and insulation (spray-on textured coatings, insulation boards)
- Wall linings and partitions (fibro-plank siding and internal cement boards)
- Floor tiles and adhesives (vinyl tiles and black bitumen mastic)
- Textured paints and coatings (often referred to as “Popcorn” ceilings)
- Pipe lagging and duct insulation
While asbestos was phased out in the 1980s due to severe health risks, many homes, commercial buildings, and industrial sites across New Zealand still contain asbestos-containing materials (ACMs). If your property was built or renovated before 2000, there is a high likelihood that asbestos is present.
Where Is Asbestos Commonly Found in New Zealand Properties?
1. Asbestos Roofing and Cladding
- Asbestos Cement Sheets (Super Six): From the 1930s to the 1980s, corrugated asbestos cement sheets (often called Super Six) were a staple for Kiwi roofs and sheds. These sheets are highly brittle; walking on or water-blasting them can release dangerous fibers.
- Decramastic and Pressed Metal Roof Tiles: During the 1970s and 80s, these tiles were widely installed. While the metal itself is safe, many were coated with a bitumen-based mastic containing asbestos. As the tiles weather, this coating flakes off into gutters and the soil.
- Roofing Shingles and Siding: External “fibro” siding and shingles are particularly hazardous when disturbed during renovations or extreme weather events.
2. Asbestos in Ceilings and Insulation
Asbestos was used in ceiling tiles and spray-on coatings (textured ceilings) to improve fire resistance. Ceiling spaces in older NZ buildings often contain high concentrations of asbestos dust.
3. Asbestos in Floor Tiles and Adhesives
Vinyl floor tiles and the black adhesives used to install them often contained asbestos. Sanding or DIY removal of these materials is one of the most common causes of accidental exposure and house contamination.
Signs Your Property May Contain Asbestos
Identifying ACMs is challenging, as asbestos is often mixed with other materials. Watch for these warning signs:
- Age of the Property: If built or renovated before 2000, assume asbestos is present until proven otherwise.
- Visual Indicators: Look for weathered corrugated sheets (Super Six), flaking Decramastic tiles, or 9-inch vinyl floor tiles.
- Deterioration: Cracking, crumbling, or water damage in roofing and cladding significantly increases the risk of fiber release.
Note: The only way to confirm asbestos is through professional testing by an accredited laboratory. Never handle suspected materials yourself.
The Dangers of Deteriorating Asbestos Roofs
New Zealand’s harsh UV exposure and high rainfall accelerate the breakdown of asbestos materials.
- Cracking and Splitting: Asbestos cement becomes brittle with age.
- Flaking and Erosion: Bitumen coatings on metal tiles degrade, releasing particles into the environment.
- Moss and Lichen: Growth on asbestos roofs can roots into the material, pulling fibers loose.
Why Professional Asbestos Removal Is Essential
1. Legal and Safety Compliance
In New Zealand, removal is regulated under the Health and Safety at Work (Asbestos) Regulations 2016.
- Licensed Professionals: Only certified removalists with Class A or Class B licenses should handle asbestos.
- Safe Disposal: Asbestos must be wetted, sealed, and transported to licensed facilities in accordance with local council bylaws.
2. Health Protection
Licensed professionals use specialized vacuum systems (HEPA filters), protective gear, and containment zones to ensure your family or staff are never exposed.
The Southern Cross Asbestos Removal (SCAR) Difference
We specialize in safe removal for residential and commercial properties across New Zealand.
- Comprehensive Testing: Partnering with accredited labs for accurate results.
- Licensed & Insured: We hold both Class A and Class B licenses.
- NZ-Wide Reach: Providing expert solutions tailored to local conditions.
Frequently Asked Questions About Asbestos Removal
- Is asbestos removal common in Auckland, Wellington, and Christchurch?
Yes. Due to the age of the housing stock in major centers like Auckland, Wellington, and Christchurch, asbestos removal is a standard part of renovations and property maintenance. SCAR operates across these regions to ensure local compliance.
- Can I remove a small asbestos myself in New Zealand?
While NZ law allows homeowners to remove up to 10m2 of non-friable asbestos, WorkSafe NZ and SCAR strongly advise against it. Without professional decontamination and air monitoring, you risk contaminating your home and soil.
- What is the cost of asbestos removal in NZ?
Costs vary based on the material (e.g, Friable or Non Friable) accessibility, and location. We provide free, no-obligation quotes to give you an accurate estimate for your specific region.
- How long does the removal process take?
Most residential roofs in places across New Zealand can be safely removed and cleared in 1-3 days, depending on weather and complexity. Most residential internal ceilings and vinyl can be safely removed in 5 to 8 days – subject to number of rooms and area.
- How do I know if my Decramastic tiles contain asbestos?
Because the asbestos is in the bitumen coating, it cannot be identified by eye. If your Decramastic tiles were installed before the mid-80s, they likely contain asbestos. We can take a sample for lab testing.
- What should I do if I suspect asbestos in my home?
Do not touch, sand, or water-blast the area. Contact SCAR immediately for a professional assessment.
Protect Your Property and Your Health with SCAR
Asbestos is a silent hazard. Proactive testing and removal protect your health and your property’s value.
Contact SCAR Today for a Free Quote
- Phone: 0800 722 711
- Email: shawn@scar-ltd.com
