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Published on 22 Dec 2025

On June 14, 2017, the Grenfell Tower fire in London claimed 72 lives

More than eight years later, one conclusion is unavoidable: this tragedy could have been mitigated. It was not merely an accident, but the result of a cumulative failure of technical, regulatory, and organizational systems, the consequences of which proved fatal.

For ANPI, this catastrophe illustrates more than ever the importance of prevention, rigorous material testing, and the management of risks associated with facades—particularly in high-rise buildings and renovated structures.

Watch the free webinar: Grenfell, 8 years later… Are facade claddings still a problem?

Access the replay directly to understand the essential technical, regulatory, and operational lessons.

Lightning-fast propagation linked to facades

The fire, which started in a 4th-floor apartment, reached the top of the tower in about twenty minutes.

Investigations have shown that this abnormally rapid spread was due to:

  • Combustible facade cladding,
  • Highly flammable insulation,
  • A chimney effect within the air cavity of the ventilated facade.

As a result, the fire spread rapidly both vertically and horizontally, bypassing all possibilities of containment.

A succession of avoidable errors

The official report identifies several aggravating factors:

  • Failing compartmentation (fire doors, extractors, automatic closers),
  • Absence of sprinklers during the renovation,
  • "Stay Put" evacuation strategy maintained despite the loss of compartmentation,
  • Insufficient operational preparation of emergency services,
  • Errors and gaps in regulatory oversight and material selection.

Combined, these elements transformed a localized fire into one of the worst residential fires in Europe.

Why is this analysis essential for Belgium?

Belgium now has a solid regulatory framework, which has been strengthened specifically regarding facades. However, many buildings predating these requirements still pose risks:

  • Combustible materials,
  • Renovations carried out without prior fire risk analysis,
  • Compartmentation weakened over time.

The challenge is clear: we must not underestimate the impact of facades and compartmentation on fire spread, and we must continue to foster a true culture of prevention.

Free webinar: Understanding for better prevention

ANPI provides a comprehensive webinar bringing together technical, regulatory, and operational lessons learned from Grenfell, as well as best practices for facade fire safety in Belgium.

Watch the free webinar: Grenfell, 8 years later… Are facade claddings still a problem?

Go further: You can find all resources regarding the Grenfell Tower fire here: Documents, analyses, theories, regulations, useful links, and additional information are available.

Illustration: Natalie Oxford, Wikipedia CC BY 4.0

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