Understanding the Differences Between Class A and Class B Asbestos Removal

Asbestos removal is a critical process that ensures the safety and health of individuals in residential, commercial, and industrial environments. At Revolve Asbestos, we prioritize providing clear and accurate information to help our clients understand the complexities of asbestos removal. One of the most common questions we receive is about the differences between Class A and Class B asbestos removal. This blog aims to demystify these classifications and explain why choosing the right class of removal is essential for your safety and compliance with New Zealand regulations.

Class A Asbestos Removal

Class A vs Class B asbestos removal

Class A asbestos removal refers to the removal of friable asbestos. Friable asbestos is material that can easily crumble or be reduced to powder by hand pressure when dry. This type of asbestos is highly dangerous because it can release fibers into the air, posing a significant health risk. Examples of friable asbestos include:

  • Asbestos insulation
  • Sprayed coatings
  • Pipe lagging
  • Asbestos-containing gaskets

Requirements for Class A Removal:

  • Licensed Removalists: Only licensed professionals with specialized training and certification are permitted to perform Class A asbestos removal.
  • Protective Gear: Workers must wear full personal protective equipment (PPE), including respirators, disposable coveralls, and gloves.
  • Controlled Environment: The removal area must be isolated and controlled to prevent asbestos fibers from spreading. This often involves setting up negative pressure enclosures and using high-efficiency particulate air (HEPA) filtration systems.
  • Clearance Certification: After removal, the area must be thoroughly cleaned and inspected. An independent assessor must issue a clearance certificate to confirm that the area is safe for reoccupation.

Examples of Class A controls
Examples of Class A controls

Class B Asbestos Removal

Class B asbestos removal deals with non-friable asbestos. Non-friable asbestos is bonded with other materials, making it less likely to release fibers unless it is disturbed or damaged. Common examples of non-friable asbestos include:

  • Asbestos cement products (e.g., roofing, cladding, and fencing)
  • Vinyl floor tiles
  • Asbestos-containing adhesives and mastics

Requirements for Class B Removal:

  • Licensed Removalists: While a specific Class B license is required, the training and certification requirements are less stringent compared to Class A.
  • Protective Gear: Workers must still use appropriate PPE, but the level of protection may be lower than that required for Class A removal.
  • Controlled Procedures: Although the risk of fiber release is lower, precautions must still be taken to minimize disturbance and safely manage any asbestos-containing materials.
  • Clearance Inspection: A visual inspection is typically sufficient to ensure all asbestos has been removed, and a clearance certificate may not always be necessary.
Examples of class A and Class B controls

Why the Difference Matters

Understanding the difference between Class A and Class B asbestos removal is crucial for several reasons:

  1. Safety: Knowing the type of asbestos present in your building helps ensure that the correct procedures are followed to protect everyone involved.
  2. Regulatory Compliance: Adhering to New Zealand regulations for asbestos removal is mandatory. Non-compliance can result in hefty fines and legal repercussions.
  3. Health Risks: Properly managing asbestos removal reduces the risk of exposure to harmful asbestos fibers, safeguarding your health and that of others.

Choosing the Right Professionals

At Revolve Asbestos, we are committed to providing expert asbestos removal services, whether you need Class A or Class B removal. Our team of licensed professionals is equipped with the knowledge, skills, and tools to safely and efficiently handle any asbestos situation. We prioritize safety, compliance, and customer satisfaction in every project we undertake.


Understanding the differences between Class A and Class B asbestos removal can help you make informed decisions about managing asbestos in your property. Whether dealing with friable or non-friable asbestos, it's essential to choose experienced and licensed professionals to ensure the job is done safely and effectively. Contact Revolve Asbestos today to learn more about our comprehensive asbestos removal services and how we can assist you in maintaining a safe environment.

Understanding the Differences Between Class A and Class B Asbestos Removal
Understanding the Differences Between Class A and Class B Asbestos Removal

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