Asbestos Demolition & Refurbishment Surveys: NZ Guide

Asbestos-containing materials (ACMs) are generally safe when they are in good condition and left undisturbed. However, once these materials are cut, drilled, sanded, or broken during refurbishment or demolition work, they release microscopic asbestos fibres into the air. Inhaling these fibres can lead to severe, often fatal, diseases such as asbestosis, mesothelioma, and lung cancer, which may not manifest for decades after exposure.

This is precisely why intrusive surveys are legally mandated. They ensure that all ACMs are identified and safely managed or removed before any disturbance occurs, safeguarding the health of workers, building occupants, and the wider community.

While both surveys are intrusive, their methodologies differ significantly to match their purpose:

• Targeted Investigation: The survey focuses specifically on the areas slated for renovation. This precision ensures that only necessary areas are disturbed, minimizing costs and disruption.

• Intrusive Access: Surveyors will carefully access voids, wall cavities, subfloors, and other concealed areas that will be affected by the proposed works. This often involves minor, controlled damage to surfaces to gain access, which is then remediated.

• Sampling and Analysis: Suspect materials are sampled using specialized techniques to prevent fibre release. These samples are then sent to an accredited laboratory for rigorous analysis to confirm the presence and type of asbestos.

• Detailed Report: A comprehensive report outlines the precise location, type, and condition of any ACMs found, along with clear, actionable recommendations for their safe removal or management prior to refurbishment. This report is crucial for planning the next steps safely and compliantly.

• Full Building Scope: This survey covers the entire building structure, from foundations to roof, including all internal and external elements. No stone is left unturned, as the goal is complete eradication of asbestos risks.

• Destructive Inspection: Surveyors will undertake destructive inspection techniques to expose all hidden areas, ensuring no ACMs remain undetected. This often involves breaking through walls, ceilings, and floors, as the structure is ultimately destined for demolition.

• Extensive Sampling: Due to the comprehensive nature and destructive methods, a significantly greater number of samples are typically taken and analysed compared to a refurbishment survey. This thoroughness guarantees a complete understanding of asbestos presence.

• Clearance for Demolition: The final report provides a clear pathway for the safe and compliant demolition of the structure, detailing all ACMs to be removed beforehand. This document is essential for obtaining necessary permits and ensuring worker safety during the demolition phase.