Asbestos in your roof can change how repairs, renovations or a roof replacement need to be planned. The first challenge is knowing whether asbestos is actually present, as you cannot reliably identify it from appearance alone.
Older Auckland homes and commercial properties may still have asbestos-containing roofing, including some fibre cement products and historical coatings used on pressed metal roofing.
If you suspect asbestos, professional assessment and, where appropriate, testing should happen before the material is cut, drilled, broken or removed. If it is confirmed, the next step is understanding the requirements and costs involved in asbestos roof removal in Auckland.
Removal costs vary according to the size and condition of the roof, asbestos type, access, disposal and controls required. Here’s how to identify a roof that warrants further investigation, what affects removal costs and what happens if the roof needs replacing.
How Can You Tell if There is Asbestos on Your Roof?
You cannot confirm asbestos simply by looking at a roof. Some asbestos-containing roofing materials look very similar to products that do not contain asbestos.
There are, however, signs that further investigation may be worthwhile:
- The property or relevant roof section dates from before 2000.
- Corrugated fibre cement roofing is present.
- The roofing product or manufacturer is unknown.
- Older pressed metal or Decramastic-style roofing is installed.
- Roofing sheets or tiles are damaged or deteriorating.
- Renovation, demolition or re-roofing will disturb the material.
- Contractors need to penetrate, cut or remove the existing roof.
These are indicators, not confirmation.
Building records and information about previous roofing work can provide useful clues. Where the history remains uncertain, appropriate testing can establish whether asbestos is present.
What Does Asbestos Roofing Look Like?
There is no single appearance that identifies asbestos roofing.
Corrugated fibre cement is one older roofing material commonly associated with asbestos, but colour, profile, age and weathering cannot confirm its composition.
Some older New Zealand pressed metal roofing also warrants investigation. Certain historical mastic or bitumen coatings used with stone-coated pressed metal tiles could contain asbestos.
This means asbestos in roof tiles may involve a coating or component of the roofing system rather than an obviously cement-like tile.
Not every old fibre cement or Decramastic-style roof contains asbestos. If the product is unknown, uncertainty should lead to assessment rather than guesswork.
Can You Identify Asbestos in Roof Tiles From a Photo?
No. A photograph can provide clues about the type and approximate age of a roof, but it cannot reliably confirm asbestos.
Appropriate sampling and laboratory analysis can establish whether asbestos fibres are present.
Property owners should not break, scrape, cut or remove part of suspected asbestos roofing to obtain their own sample. Where testing is required, sampling should be carried out by someone with the appropriate knowledge and competence.
How Much Does Asbestos Roof Removal Cost in Auckland?
There is no single price that accurately represents every asbestos roof removal project in Auckland.
A small, easily accessible area of non-friable asbestos roofing presents a very different scope from a large commercial roof requiring extensive access equipment, site controls and disposal.
Several factors influence what removing an asbestos roof will cost.
Size of the Roof
The amount of asbestos-containing material being removed is one of the main pricing factors. A larger roof generally means more labour, handling, transport and disposal.
Type of Asbestos
Removal requirements differ depending on whether the material is friable or non-friable. This can affect the licence, controls and removal method required.
Condition of the Material
Intact bonded roofing presents a different removal situation from badly deteriorated or damaged material.
Roof Height and Pitch
Higher, steeper or difficult-to-access roofs may require additional safety measures and equipment.
Scaffolding and Site Access
Scaffolding, edge protection and access requirements can contribute to the project cost. Restricted driveways, neighbouring buildings and limited areas for equipment or waste handling can also affect how the work is carried out.
Asbestos Disposal
Asbestos-containing roofing cannot be treated as general building waste. Appropriate containment, transportation and disposal form part of the removal scope.
Residential or Commercial Requirements
Commercial properties that need to remain operational can require additional scheduling, access management and site controls.
The Replacement Roof
Asbestos removal and installation of the new roof are separate components of the overall project.
Once the asbestos roofing is removed, additional work may include checking the exposed structure, preparing the roof, installing underlay and flashings and fitting the new roofing system.
If you’re budgeting for the complete project rather than removal alone, our guide to roof replacement costs in Auckland explains the factors that affect the replacement stage.
For the asbestos component itself, an on-site assessment provides a more useful figure than a generic rate because the actual roof, access and removal requirements can be considered.
When Should Asbestos Roof Tiles Be Tested?
Testing should be considered when asbestos is suspected and planned work could disturb the material.
This is particularly relevant before:
- replacing an old roof;
- removing roofing sheets or tiles;
- creating new roof penetrations;
- carrying out substantial repairs;
- demolition or renovation work; or
- other work that could damage the existing roofing.
Identifying asbestos before physical work begins makes it easier to determine the appropriate removal requirements and coordinate contractors.
For example, discovering asbestos roof tiles after scaffolding, materials and roofing contractors have already been booked can change the project scope and schedule.
Early identification gives everyone involved a clearer picture of what needs to happen first.
Is Removing an Asbestos Roof a Licensed Job in New Zealand?
Often, yes. The requirements depend on the type and quantity of asbestos involved.
Under New Zealand’s Health and Safety at Work (Asbestos) Regulations 2016, friable asbestos removal requires a Class A asbestos removal licence.
Removal of more than 10 square metres of non-friable asbestos or asbestos-containing material at a workplace, measured cumulatively across the removal project for the site, requires at least a Class B asbestos removal licence.
Class A licence holders can remove friable and non-friable asbestos. Class B licensing covers non-friable asbestos within the scope permitted by the regulations.
There are limited circumstances where 10 square metres or less of non-friable asbestos can be removed without an asbestos removal licence.
That threshold should not be treated as a recommendation for DIY asbestos roof removal. Roofing introduces working-at-height risks, while asbestos work requires appropriate handling, controls and disposal.
A complete roof replacement can also easily involve considerably more than 10 square metres of material.
If removal is required, you can read more about the process for removing asbestos roofing in Auckland.
Does Asbestos Roofing Always Need to Be Removed?
Not necessarily.
Whether asbestos-containing roofing should be removed depends on its condition, location and what work is planned around it.
Intact bonded asbestos-containing material presents a different situation from roofing that is deteriorating or about to be disturbed.
Removal becomes particularly relevant when:
- the roof has reached the end of its serviceable life;
- roofing materials are deteriorating;
- substantial repairs are required;
- renovations will disturb the material; or
- the entire roof is being replaced.
If the roofing is remaining in place, professional advice can determine how it should be managed.
Where replacement is required, asbestos removal needs to be planned before the new roofing stage begins.
What Happens When an Asbestos Roof Is Removed?
The exact process depends on the property, material and applicable removal requirements, but a roof replacement generally follows a clear sequence.
1. Identify the roofing material
The existing roof, its age and available building information are reviewed, with testing arranged where appropriate.
2. Confirm the removal requirements
The asbestos type, amount, condition and project environment determine the requirements that apply.
3. Plan access and site controls
Access, safety measures and applicable asbestos controls are established before removal starts.
4. Remove and dispose of the asbestos roofing
The asbestos-containing material is removed, contained, transported and disposed of appropriately.
5. Complete the required clearance process
The site needs to be ready before subsequent roofing work begins.
6. Check the exposed roof structure
Once the old material is removed, the underlying structure can be inspected and prepared for the replacement system.
7. Install the replacement roof
The new underlay, flashings and roofing system can then be installed.
Where the entire roof is being replaced, coordinating asbestos roof removal with the subsequent Auckland re-roofing work can make the transition between the two stages clearer.
Can You Replace an Asbestos Roof With Long Run Metal Roofing?
Yes. Once the asbestos-containing material has been appropriately removed and the site is ready for subsequent roofing work, the old roof can be replaced with long run metal roofing where the building is suitable.
The exposed roof structure should first be checked to determine whether repairs or preparation are required.
The replacement roofing can then be selected according to the building design, roof pitch, exposure and drainage requirements.
For properties replacing an older asbestos-containing roof, long run metal roofing provides a modern alternative with known product specifications and maintenance requirements.
What About Asbestos Roofing on Commercial and Body Corporate Properties?
Asbestos in roof materials can require additional planning on commercial buildings, unit title developments and other workplaces.
Building owners and businesses can have duties concerning the identification and management of asbestos. Where asbestos has been identified or is likely to be present in a workplace, an asbestos management plan may also be required under the Asbestos Regulations.
For property and facilities managers, establishing the asbestos status before tendering the roofing work can make the project scope clearer.
It allows contractors to understand:
- what material needs to be removed;
- what licensing requirements apply;
- how access will be managed;
- whether occupants will be affected;
- when the roofing contractor can start; and
- how removal and replacement should be scheduled.
This is particularly important for larger commercial projects where multiple contractors, employees or building users may be present.
What Should You Do if You Suspect Asbestos in Your Roof?
If you think there may be asbestos in your roof, avoid disturbing the material until you know what it contains.
A sensible next step is:
1. Check the property’s age and roofing history.
Find out when the existing roof was installed or substantially altered.
2. Review available information about the roofing.
Building records and product information may provide useful clues without disturbing the material.
3. Arrange assessment or testing where appropriate.
Testing can confirm whether asbestos is actually present.
4. Establish the roofing scope.
Determine whether the roof is staying in place, being repaired or being replaced.
5. Confirm the removal requirements.
The asbestos type, amount, condition and site will affect what is required.
6. Plan removal and replacement together.
Where a new roof is required, coordinate both stages before physical work starts.
For Auckland properties where removal is required, find out more about asbestos roof removal in Auckland and how the removal and replacement stages can be coordinated.
Frequently Asked Questions About Asbestos Roofing in New Zealand
Can you tell if a roof contains asbestos from a photograph?
No. A photograph can show roofing that warrants further investigation, but it cannot reliably confirm asbestos. Appropriate testing is required to establish whether asbestos fibres are present.
Are all old Decramastic-style tiles asbestos?
No. Not every older pressed metal tile contains asbestos. However, some historical coatings used with these products could contain it, so roofing of uncertain composition should be assessed before disturbance.
Can asbestos roofing stay in place if it is in good condition?
Potentially. The appropriate approach depends on its condition, location and future work. Intact bonded material presents a different situation from damaged or disturbed material, so professional assessment should guide the decision.
Do asbestos roof tiles have to be removed before a re-roof?
If the existing asbestos-containing roofing is being replaced, it needs to be appropriately removed before the replacement roof is installed. The assessment should establish the required removal approach before roofing work begins.
Who can remove asbestos roofing in New Zealand?
Licensing depends on the asbestos type and quantity. Friable asbestos requires Class A licensed removal, while removal of more than 10 square metres of non-friable asbestos at a workplace requires at least a Class B licence.
Can long run metal roofing replace an asbestos roof?
Yes, where the building and roof structure are suitable. The asbestos-containing material needs to be appropriately removed first so the structure can be prepared for the new roofing system.
Need Asbestos Roofing Removed in Auckland?
If an older roof is due for replacement and asbestos is suspected, establish what the material contains before work begins.
An assessment can clarify what you’re dealing with, what removal requirements apply and the scope involved in moving from the old roof to its replacement.
Learn more about asbestos roof removal in Auckland for residential and commercial properties, including the removal, disposal and transition to a replacement long run metal roof.
