Combustible Cladding: Risks, Regulations, and Remediation Strategies

Introduction

Combustible cladding has emerged as one of the most critical fire safety challenges in the built environment. High-profile incidents such as the Grenfell Tower fire in London have highlighted how combustible façade materials can significantly accelerate fire spread, resulting in catastrophic consequences. This article explores the risks associated with combustible cladding, the evolving regulatory framework, and practical strategies for assessment and remediation.

What Is Combustible Cladding?

Combustible cladding refers to external wall materials that can ignite and contribute to the rapid spread of fire across a building’s façade. Common high-risk materials include:

Aluminium Composite Panels (ACPs) with polyethylene (PE) cores
Certain expanded polystyrene (EPS) insulation systems

When combined with ventilation cavities in façade systems, these materials can create a chimney effect, allowing flames to spread quickly upward and across multiple floors.

Why Is Combustible Cladding a Fire Hazard?

Combustible cladding increases fire risk due to:

Rapid external fire spread, bypassing internal fire compartments
Delayed evacuation, especially in high-rise buildings
Challenges for fire brigade intervention, limiting suppression effectiveness
Increased radiant heat and falling debris, endangering occupants and responders

Regulatory Landscape in Australia

Governments across Australia have introduced stricter controls to address combustible cladding risks.

Key Regulatory Frameworks

National Construction Code (NCC): Updated to restrict the use of combustible materials on external walls of certain building classes
State-Based Regulations: Mandate façade assessments, risk evaluations, and remediation where required

State-Specific Oversight

Victoria: Cladding Safety Victoria (CSV) oversees identification and rectification programs
New South Wales: Cladding Product Safety Panel (CPSP) provides regulatory guidance
Queensland: Building and Other Legislation (Cladding) Amendment Regulation 2018 requires registration and assessment of affected buildings

Assessment and Risk Management

Identifying and managing combustible cladding is the first step toward reducing fire risk. Fire engineers conduct detailed audits and risk assessments to determine the extent and severity of the hazard.

Key Assessment Steps

Material Identification: Sampling and testing façade materials for combustibility
Fire Spread Analysis: Evaluating how the façade system influences fire behaviour
Occupant Risk Assessment: Reviewing evacuation complexity and fire brigade access

Remediation Strategies

Addressing combustible cladding risks requires a balanced approach between full replacement and interim mitigation measures.

Cladding Replacement

Removal of non-compliant materials
Installation of non-combustible alternatives such as solid aluminium or mineral-based products
Long-term compliance and risk elimination

Fire Mitigation Measures

Where immediate replacement is not feasible:

Installation of horizontal and vertical fire breaks
Upgrading fire detection and alarm systems
Application of fire-retardant coatings

Case studies from completed remediation projects demonstrate that these strategies significantly enhance life safety and regulatory compliance.

Key Takeaway

Combustible cladding remains a critical issue in the built environment, necessitating proactive risk management and regulatory compliance.

Building owners, developers, and consultants must stay informed and act early to reduce risk, ensure occupant safety, and meet legal obligations.

How FyreWise Engineering Can Help

FyreWise Fire Engineering in Brisbane specialises in:

Combustible cladding risk assessments
Fire engineering performance solutions
Regulatory compliance support
Remediation planning and advisory services