After a major house fire, the insurer approved $78,000 for structural repairs but rejected the contamination claim entirely. Our independent forensic assessment documented chemical contamination from combustion products, volatilised lead paint, and released asbestos fibres throughout the property — evidence that expanded the settlement to $258,000 and secured $180,000 in additional remediation funding.

The Situation

A homeowner in the Blue Mountains contacted Test Australia after their insurer rejected the contamination component of their fire damage claim. The property — a 1970s brick veneer home — had suffered a significant fire that originated in the attached garage and workshop area, spreading through the roof space before being contained by fire services.

The insurer’s assessor had inspected the property and approved $78,000 for structural repairs: replacement of the garage roof structure, damaged wall framing, electrical rewiring, and cosmetic repairs to smoke-damaged rooms. However, the homeowner’s claim for contamination assessment and remediation was rejected on the basis that “the fire was contained and structural repairs will address all damage.”

The homeowner was experiencing respiratory symptoms and headaches when visiting the property to retrieve belongings. They contacted Test Australia to determine whether chemical contamination extended beyond the visible fire damage zone. As a Chartered Chemist with over 24 years of forensic experience, our principal was well-positioned to assess the complex chemistry of fire-generated contaminants.

Our Investigation

Our assessment went far beyond structural inspection. Fire produces a complex cocktail of chemical contaminants that spread via smoke, thermal convection, and water runoff — often reaching areas with no visible fire damage. Our investigation included four categories of analysis:

Surface Wipe Sampling for PAHs

We collected 18 surface wipe samples across the property for polycyclic aromatic hydrocarbon (PAH) analysis. PAHs are produced by incomplete combustion of organic materials (timber, furnishings, plastics) and include several known carcinogens. Samples were taken from surfaces in every room, including rooms with no visible fire or smoke damage, and submitted to an independent NATA-accredited laboratory.

Heavy Metal Analysis

The property was built in the 1970s, meaning pre-1970 lead-based paints were likely present under subsequent paint layers. When exposed to fire temperatures (typically 600-1000°C), lead paint volatilises — converting to lead oxide fumes that travel with smoke and deposit on surfaces throughout the property. We collected 12 dust wipe samples for heavy metal screening including lead, cadmium, chromium, and zinc.

Asbestos Bulk Sampling

Australian homes built before 1990 commonly contain asbestos in eaves, cement sheeting, insulation, and roofing materials. Fire and fire-fighting water can damage and disturb these materials, releasing respirable asbestos fibres into the indoor environment. We collected 8 bulk samples from damaged eaves, ceiling space debris, and settled dust for asbestos identification.

VOC Screening

Volatile organic compounds (VOCs) are produced when synthetic materials (plastics, foams, carpets, adhesives) undergo thermal decomposition. We conducted real-time VOC screening across the property using calibrated photoionisation detection (PID) equipment to map the extent of volatile contamination.

What the Results Revealed

The laboratory results confirmed extensive chemical contamination well beyond the visible fire damage zone:

PAH Contamination

Benzo[a]pyrene — the most toxicologically significant PAH and a Group 1 carcinogen — was detected at 3 times the NEPM health investigation level in the living room, which was two rooms away from the fire origin. Total PAH concentrations exceeded health screening levels in 11 of 18 samples, including the master bedroom, children’s bedrooms, and kitchen. The contamination had spread through the roof space and settled on surfaces throughout the home via ceiling penetrations and ventilation pathways.

Lead Contamination

Lead levels in settled dust exceeded the Australian residential guideline of 8 µg/ft² in 8 of 12 rooms. The highest readings were in the hallway connecting the garage to the main dwelling (45 µg/ft²) and the kitchen (32 µg/ft²). The lead had volatilised from the garage’s original paint layers during the fire and deposited throughout adjacent rooms via smoke transport. This is particularly concerning because lead dust is a significant health hazard for children — the property was a family home with two young children.

Asbestos

Chrysotile asbestos was positively identified in the damaged eaves lining and in debris within the roof space. Fire-fighting water had further disturbed asbestos-containing materials, and asbestos fibres were identified in settled dust samples from three rooms below the damaged roof space. The presence of respirable asbestos fibres in living spaces represented an immediate health risk requiring professional remediation.

VOC Levels

PID screening showed elevated total VOC readings (2-5 times background) in the garage, hallway, and living areas — consistent with ongoing off-gassing from fire-damaged synthetic materials that had not been removed.

The Outcome

Our comprehensive forensic report documented the contamination with laboratory data, referenced every result against the relevant Australian health investigation levels (NEPM, NOHSC), and provided a detailed remediation scope addressing each contaminant category:

• PAH remediation: Professional cleaning of all surfaces, soft furnishing replacement, carpet removal, and HEPA vacuuming of the entire property
• Lead decontamination: Specialist lead dust cleaning per AS 4361.2, with clearance sampling to confirm levels below residential guidelines
• Asbestos removal: Licensed asbestos removal of damaged eaves and contaminated ceiling space debris, with air monitoring clearance
• VOC source removal: Removal and replacement of fire-damaged synthetic materials, with post-remediation VOC verification

The estimated remediation cost for all contamination categories was $180,000+ — on top of the $78,000 structural repair already approved. After reviewing our independent forensic report, the insurer accepted the evidence and expanded the total settlement to $258,000. The remediation was performed by a licensed contractor (independent of Test Australia) with post-remediation verification confirming all contaminant levels were returned below health investigation levels.

Key Lessons

1. Fire damage assessment must go beyond structural. Insurers’ structural assessors are not trained to identify or quantify chemical contamination. PAHs, heavy metals, asbestos fibres, and VOCs from combustion products routinely exceed health investigation levels in areas with no visible fire damage.
2. Older homes present compounding risks. Properties built before 1990 commonly contain asbestos and lead paint. Fire converts these stable materials into acute health hazards — volatilised lead and released asbestos fibres — that require specialist remediation.
3. Smoke travels further than fire. Chemical contamination via smoke transport can affect every room in a dwelling, even when the fire itself was contained to one area. Surface wipe sampling is the only way to objectively determine the contamination extent.
4. Independent forensic evidence changes outcomes. The homeowner’s claim was rejected until independent, NATA-accredited laboratory results were presented with expert interpretation referencing Australian health guidelines. Scientific evidence from a qualified, independent source is difficult to dispute.
5. Act quickly after a fire. Chemical contaminants from fire continue to deposit on surfaces over days and weeks following the event. Early assessment provides a clear baseline and prevents further exposure. Contact Test Australia as soon as the property is safe to enter.