How does a localized spark turn into a city’s deadliest blaze in decades? In Hong Kong’s Tai Po district, investigators say the answer lies in a lethal combination of combustible scaffolding, non‑compliant exterior materials, and systemic lapses in fire safety enforcement. The inferno that consumed seven out of eight towers at the Wang Court complex claimed the lives of 128 people, injured 79, and left hundreds missing, exposing engineering and oversight failures that allowed fire to spread with extraordinary speed.
The complex, built in the 1980s and housing nearly 4,800 residents, was under major renovation when the fire erupted. Bamboo scaffolding-an ancient construction method still common in Hong Kong-wrapped each building in vertical lattices bound with nylon cords. While prized for flexibility and low cost, bamboo is inherently flammable. “Bamboo is definitely a flammable material. This is a very dry season in Hong Kong, so, the likelihood of ignition of this bamboo is very high. Once it’s ignited, the fire spread will be super-fast,” said Xinyan Huang, associate professor at the Hong Kong Polytechnic University’s Department of Building Environment and Energy Engineering. Its vertical orientation created a direct path for flames to race upward without resistance.
Covering the scaffolding was green safety netting meant to catch debris. By code, such netting should have fire‑retardant properties, but inspections after the blaze found seven of 20 samples failed safety standards. Hong Kong’s Chief Secretary Eric Chan accused contractors of cutting corners to boost profits: “They just wanted to make money at the expense of people’s lives.” The netting, along with other exterior coverings such as waterproof tarpaulins and plastic sheets, became fuel for the fire once ignited.
But the most dangerous accelerant was the presence of highly flammable foam panels affixed over windows on every floor. Police identified the material as polystyrene, which is known to burn quickly and produce thick, toxic smoke. Once the foam caught fire, heat shattered the glass, allowing flames to break into interior spaces. “The blaze ignited the foam panels, causing the glass to shatter and leading to a swift intensification of the fire and its spread into the interior spaces,” said Security Secretary Chris Tang. This mechanism is the same as in façade-driven fire propagation in London’s 2017 Grenfell Tower disaster, in which combustible cladding allowed flames to bypass compartmentalized fire protection.
Engineering oversight failures compounded the hazard. Residents had complained for almost a year about the flammability of the renovation materials, including the foam insulation and the mesh. The Labour Department conducted 16 inspections between July 2024 and November 2025 and issued six improvement notices and initiated three prosecutions. Yet the latest inspection-just a week before the fire-did not prevent disaster. Meeting minutes from the homeowners’ committee revealed unresolved maintenance issues with fire water inlets, hoses, alarm bells, extinguishers, and emergency lighting. Tang confirmed that some fire alarms did not sound when tested after the incident.
The fire spread with amazing rapidity. Firefighters were called at 2:51 p.m., and in five minutes flames had raced up the scaffolding, entered the building, and sprang to the neighbouring towers. Seven 31‑story buildings were burning in four hours. The bamboo scaffolding served as a continuous combustible shell, and wind sent embers leaping across the narrow openings between towers. As Huang and other experts emphasized, while buildings are designed to resist isolated internal fire, they are not engineered for external fire spread racing along façades.
Authorities have launched a criminal investigation, arresting the directors and an engineering consultant from Prestige Construction & Engineering, the firm in charge of renovations, along with scaffolding subcontractors and project managers. Charges include manslaughter and gross negligence. Police seized company documents and bank records, and the Independent Commission Against Corruption is looking at possible fraud in material procurement.
The disaster has heightened debate over Hong Kong’s reliance on bamboo scaffolding. Mainland China outlawed the practice in 2022, moving to metal scaffolding for better safety. Hong Kong’s Development Bureau said earlier this year that half of new public projects would be made of metal, but mainly for the safety of workers rather than to prevent fires. Since the Wang Court fire, officials are considering a wider requirement for metal scaffolding and emergency inspections of all renovation sites to check if they meet fire‑retardant standards.
For fire safety engineers, the Tai Po tragedy underlines the critical role of exterior material selection, façade design, and rigorous enforcement of codes. The combination of combustible scaffolding, inadequate fire‑retardant netting, and flammable cladding created a high‑rise environment where a single ignition point could and did overwhelm every intended line of defense.
