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Hong Kong High-Rise Fire 2025: A White Paper on Fire-Safe Insulation Solutions

Hong Kong High-Rise Fire 2025: A White Paper on Fire-Safe Insulation Solutions

Executive Summary

The tragic Hong Kong fire in November 2025, which claimed over 150 lives, underscores the critical importance of using fire-resistant building materials. Investigations reveal that combustible cladding, foam panels, and substandard renovation materials accelerated the fire’s spread. For developers and contractors, selecting certified, non-combustible insulation is no longer optional—it’s a regulatory, ethical, and financial imperative.

This white paper highlights the technical specifications, performance data, and best practices for Rock Wool and other fire-safe insulation solutions, providing actionable guidance for high-rise construction and renovation projects.

1. The Context: Why Fire-Safe Materials Matter

Key lessons from Hong Kong 2025:

  1. The fire started on bamboo scaffolding and rapidly spread due to flammable external cladding and foam panels.
  2. Substandard materials failed to meet fire-safety codes, resulting in catastrophic vertical fire propagation.
  3. Proper fire-rated insulation could have slowed or prevented flame spread, saving lives and property.
  4. For developers, this translates to two imperatives:
  5. Compliance with national and international fire standards (ISO 834, ASTM E84, BS 476).
  6. Choosing materials that actively resist ignition and do not contribute fuel to potential fires.
Hong Kong High-Rise Fire 2025: A White Paper on Fire-Safe Insulation Solutions 1

2. Recommended Insulation Solutions

Material Fire Rating Thermal Conductivity Density Key Benefits
Rock Wool (Mineral Wool) Non-combustible (Euroclass A1) 0.035–0.038 W/m·K 40–200 kg/m³ Fire-resistant, soundproofing, thermal insulation, moisture-resistant
Glass Wool Non-combustible (Euroclass A1/A2) 0.032–0.037 W/m·K 30–120 kg/m³ Lightweight, flexible, easy installation
Foam Glass Non-combustible (EN 13501-1) 0.040–0.060 W/m·K 120–200 kg/m³ Chemical-resistant, moisture-proof, durable
Calcium Silicate Non-combustible 0.050–0.070 W/m·K 170–350 kg/m³ High-temperature resistance, structural reinforcement
Ceramic Fiber Non-combustible 0.055–0.065 W/m·K 128–192 kg/m³ High-temperature insulation, refractory applications

Why Rock Wool is Ideal for High-Rises:

  • Mineral-based, non-combustible: will not ignite or contribute fuel.
  • High-density options provide soundproofing and thermal performance without compromising fire safety.
  • Certified to meet ISO 1182 / EN 13501 fire standards.
  • Easy to cut, fit, and integrate into façades, walls, and mechanical systems.
Hong Kong High-Rise Fire 2025: A White Paper on Fire-Safe Insulation Solutions 2

3. Performance Data: Rock Wool vs. Common Alternatives

Property Rock Wool Polystyrene Foam Polyurethane (PUR/PIR)
Combustibility Non-Combustible Highly flammable Flammable
Smoke Emission Minimal High High
Flame Spread 0 (A1 Euroclass) >100 (Euroclass E) >75 (Euroclass B)
Heat Resistance >1000°C 75–100°C 100–150°C

Conclusion:

Using foam-based or uncertified cladding dramatically increases fire risk, as demonstrated in the Hong Kong tragedy. Rock Wool remains one of the safest solutions for high-rise projects.

4. Best Practices for Developers and Contractors

  1. Audit materials: Only source insulation with certified fire ratings.
  2. Facade design: Avoid combustible external cladding; integrate mineral-based insulation.
  3. Installation protocols: Ensure proper sealing, spacing, and support for panels.
  4. Regulatory compliance: Align with building codes; document all certifications.
  5. Emergency preparedness: Combine fire-safe insulation with alarms and sprinklers.
Hong Kong High-Rise Fire 2025: A White Paper on Fire-Safe Insulation Solutions 3

5. Call to Action

Protect your high-rise projects and tenants by choosing fire-resistant, certified insulation solutions today. At Myreal, we provide:

  • Rock Wool: Non-combustible, high-density options.
  • Glass Wool & Foam Glass: Fire-safe, efficient thermal solutions.
  • Full technical support: Material specifications, installation guidance, and compliance documentation.

Contact us to request a free safety consultation, product specification sheet or samples for your next project.

6. References

BBC News: Hong Kong High-Rise Fire

Reuters: Hong Kong Fire Investigation

AP News: Safety Concerns Post-Fire

ISO & EN Standards for Fire Safety and Insulation Materials

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