After the Fire: How Building Codes for ACP are Changing Worldwide

June 14, 2017, is not just a date in fire safety history. It is the regulatory fault line of the modern construction industry.

Before Grenfell, Aluminum Composite Panels (ACP) with 100% polyethylene (PE) cores were specified globally for high-rise facades. After Grenfell, 72 deaths triggered a cascade of bans, retrofits, and re-classifications that continue to reshape building codes from London to Sharjah, Sydney to Singapore.

This report examines how national codes have changed—and where the gaps remain.

Part 1: The Failure That Changed Everything

Grenfell Tower was retrofitted with ACP cladding containing a 100% polyethylene core—essentially "solid plastic" between two thin aluminum skins. When ignited, this core melted, dripped, and spread flame vertically with chimney-effect speed.

The regulatory failures were systemic:

- Combustible materials were permitted under "deemed-to-satisfy" provisions

- No mandatory full-scale system testing (BS 8414) for high-rise facades

- Certification bodies accepted component-level tests that ignored installation behavior

The result? A global reckoning with three distinct phases:

1. Immediate bans on PE-core ACP for high-rise residential

2. Retrofit mandates for existing non-compliant buildings

3. Harmonization of classification language (A2, B-s1,d0) across continents

Part 2: United Kingdom – From "Guidance" to Prohibition

Pre-Grenfell:  

Combustible cladding was technically discouraged for high-rises but not banned. The Approved Document B (fire safety) contained "guidance," not a statutory prohibition.

Post-Grenfell:  

The Hackitt Review (2018) condemned the "race to the bottom" in cladding specification and called for a complete cultural shift.

Key Changes:

- Ban on combustible materials in external walls of residential buildings over 18m (extended to 11m in 2023)

- Mandatory BS 8414 testing for all high-rise facade systems

- Gateway Approval Process – fire safety design frozen before construction begins

- Building Safety Regulator established with statutory enforcement powers

Legacy Impact:  

Over 500 high-rise buildings in England alone remain clad in non-compliant materials. Remediation is slow, costly, and politically volatile.

Part 3: Australia – Codifying Non-Combustibility

Pre-Grenfell:  

The Lacrosse fire (2014) in Melbourne had already exposed the danger of ACP-PE. However, regulatory response was fragmented—states acted independently.

Post-Grenfell & Lacrosse:  

Australia moved toward national harmonization with clear quantitative limits.

Key Changes:

- NSW Building Products (Safety) Act 2017 – Banned ACP cores with >30% polyethylene content

- Victorian Minister’s Guideline MG-14 (2018) – Mandated removal/replacement of combustible cladding on multi-story buildings

- National Construction Code (NCC) 2019 & 2022 – Deemed-to-satisfy pathways now require non-combustible materials (A1/A2) for external walls of Type A & B construction

Current Status:

ACP-PE is effectively banned in high-rise construction. Remediation programs continue, with costs borne by owners, strata bodies, and limited state funding.

Part 4: UAE – Retrofit at Scale

Pre-Grenfell:  

The UAE experienced multiple high-profile cladding fires (Torch Tower 2015, Address Hotel 2015, Abbco Tower 2020). The 2011 Fire and Life Safety Code had already prohibited combustible cladding for new buildings—but existing buildings were exempt.

Post-Grenfell:  

The UAE shifted from **forward-looking prohibition to retrospective remediation.

Key Changes:

- 2017 Code Updates – Full alignment with international test standards (NFPA 285, EN 13501)

- Sharjah Mandate (2023) – AED 100 million ($27.3M) allocated to replace combustible cladding on 203 buildings over seven floors

- Dubai Civil Defence – Now requires mandatory re-testing at Emirates Safety Lab (ESL); private test certificates no longer accepted

Significance:  

The UAE is the first Gulf state to publicly fund large-scale cladding replacement. This sets a precedent that combustible cladding is not just a design flaw—it is a public liability.

Part 5: Malaysia – Restriction, Not Prohibition

Pre-Grenfell:

Malaysia has regulated ACP since 1997. The Fire and Rescue Department (JBPM) required:

- Non-combustible core for buildings >18m

- BS 8414 testing for all facade systems

- Annual Fire Certificate (FC) renewal

Post-Grenfell:

       Rather than a ban, Malaysia tightened enforcement and updated standards.

Key Changes:

- MS2517:2017 – Improved specification standard for ACP (PE), introduced post-Grenfell

- BS 8414 is explicitly referenced in the Uniform Building Bylaws

- Post-CCC installations now actively audited; non-compliant cladding triggers Fire Certificate revocation

Current Status:  

ACP-PE is permitted only below 18m and only with JBPM approval. No ACP-related fire fatality has occurred—but regulators acknowledge that legacy buildings remain un-audited.

Part 6: India – Industry-Led Transformation

Pre-Grenfell:  

India had no national ban on combustible ACP. PE-core panels dominated the market due to cost and availability.

Post-Grenfell:  

Regulatory change has been slower than in the UK or UAE, but industry action is accelerating safety standards.

Key Developments:

- Viva ACP opened India’s first A2 Fire Retardant Core facility (2025) – manufacturing non-combustible panels locally to meet EN 13501-1 (A2-s1,d0) and NFPA 285

- FR A1 Honeycomb Panels introduced (2025) – zero combustibility, zero toxic emissions, certified to EN 13501-1 Class A1

- Bureau of Indian Standards (BIS) is actively revising specifications; mandatory quality control orders are expected

Market Reality:

While legislation lags, major developers and infrastructure projects (airports, metro rail) are voluntarily specifying A2/A1 materials. The market is shifting faster than the code.

Part 7: The Global Harmonization of Fire Classification

One of the most significant post-Grenfell developments is lthe inguistic and technical harmonization of fire standards.

Before Grenfell:  

"Fire retardant" meant different things in different countries. A "Class 0" material in the UK might be "B1" in China and "FR" in Australia—no direct equivalence.

After Grenfell:  

EN 13501-1 (Euroclass) has become the de facto global language of ACP fire safety.

A2 is NOT "fire retardant." A2 is mineral-based non-combustible. FR (B/C) is chemically treated plastic that still burns—it just burns slower.

Smoke & Droplets Matter:

The "s1, d0" suffix is critical. s1 = minimal smoke emission. d0 = zero flaming droplets. Polyethylene cores drip burning plastic—this is how Grenfell spread vertically.

Part 8: What Is Now Considered "Unsafe Cladding"?

There is a global consensus on what must be avoided :

1. ACP with Polyethylene Core (PE)

- Banned in the UK, UAE (new builds), Australia (high-rise)

- Severely restricted in Malaysia, Singapore

- Still sold in some markets—do not specify for external high-rise

2. Combustible Sandwich Panels (EPS/PIR/PU)

- Expanded polystyrene and polyurethane cores

- Cited in Grenfell, Kemerovo (2018), Ajman (2020), and Icheon (2021) fires

3. Non-Compliant PVC Cladding

- Some PVC panels burn fast and emit highly toxic smoke

- Must be certified to EN 13501 or equivalent; uncertified PVC is a red flag

Safer Alternatives:

- A2 / A1 mineral-core ACP (e.g., ALUCOBOND PLUS, Viva A2, Huabond A2)

- Solid aluminum panels

- Fiber cement, calcium silicate, terracotta

Part 9: The Gaps That Remain

Despite progress, critical gaps persist:

1. Retrofit Funding  

   Who pays? In the UK and Australia, owners bear costs. In Sharjah, the government pays. Most jurisdictions still have no funded solution.

2. Enforcement Variability  

   Malaysia audits post-CCC installations; India relies on voluntary adoption; the US has no federal cladding ban, only IBC model code adoption.

3. Fraudulent Certificates  

   The UAE's move to mandatory ESL re-testing highlights a global issue: private test reports are not always reliable.

4. Future Fire Risks  

   ACP is not the only threat. Combustible insulation, untested system interactions, and poor workmanship remain under-regulated.

Part 10: The Future – Prediction, Not Reaction

Leading researchers advocate a predictive, data-driven approach to facade fire safety :

- Computational Fluid Dynamics (CFD) + Artificial Neural Networks (ANN) – Simulating fire spread across entire facades, not just component tests

- Molecular Dynamics (MD) – Understanding polymer degradation and toxic smoke generation at the chemical level

- Smart Sensors – In-situ monitoring of cladding condition and moisture ingress

The goal is to shift from "test and hope" to "model and verify."

Final Verdict: A World Changed, Still Changing

Grenfell was not the first cladding fire. But it was the last that could be ignored.

Today:

- PE-core ACP is banned in high-rises across the UK, UAE, Australia, and Singapore

- A2-s1,d0 is the global baseline for safe facades

- Retrofit is now a public policy issue, not a private insurance dispute

- Harmonized standards (EN 13501) enable global specification with local compliance

But:

- Thousands of buildings remain clad in combustible materials

- Enforcement remains inconsistent

- Cost continues to delay remediation

The question is no longer "Does ACP cause fires?"

It is: "How long will we tolerate buildings that are already known to be unsafe?"