A cladding panel that looks identical from the ground can be built around two completely different cores, one that burns and spreads flame quickly, and one that genuinely doesn’t. That difference has moved from a technical footnote to a compliance question developers can no longer treat casually.

We got a call a while back from a facility manager whose building’s insurance renewal had suddenly started asking pointed questions about the exterior cladding core material, something nobody had asked about when the policy was first written years earlier. That’s roughly the shift happening across the industry right now, cladding fire performance moving from an installer-level technical detail to something insurers, developers, and increasingly building codes themselves are paying direct attention to.

The Core Material Is the Whole Story

Aluminium composite panels aren’t a single material, they’re two thin aluminium sheets bonded to a core, and that core is really what determines fire behaviour, not the aluminium skin most people assume is doing the protecting. A standard polyethylene, or PE, core burns readily and can contribute significantly to flame spread once ignited, which is exactly the failure mode that’s driven fire incidents involving ACP cladding both in India and internationally over the past several years.

Fire-retardant, or FR, core panels use mineral fillers mixed into the core to slow that burning and reduce smoke generation considerably compared to standard PE core. Mineral core, sometimes labelled A2-rated using the European classification system that’s become a common reference point even outside Europe, goes further still, built to be close to non-combustible rather than merely slower to burn. The visual difference between all three, from the ground, looking at an installed facade, is essentially nothing. The fire performance difference is enormous.

Why the Conversation Has Genuinely Shifted

Building codes in India, principally the National Building Code, have long included fire safety provisions relevant to facade materials, but enforcement and specification practice on the ground haven’t always kept pace with what the code technically requires, particularly on projects specified before fire-related cladding incidents drew wider public and regulatory attention. That gap is closing. Proposed updates under discussion around what the industry’s been referring to as NBC 2025 include tighter restrictions specifically targeting combustible facade cladding, alongside broader fire safety changes like mandatory addressable detection systems on taller residential buildings.

Worth being precise here rather than overstating it, these updates become enforceable once a specific state or municipal authority formally adopts them into local building bylaws, not automatically nationwide the moment a draft is finalised. That said, the direction is unambiguous enough that treating FR or A2 core as the sensible default going forward, rather than waiting for a specific local mandate to force the decision, is what most facade consultants we work alongside are now recommending to clients as standard practice.

Where This Played Out on an Actual Renovation

A commercial building we consulted on near Pune’s outer ring had originally been clad with standard PE core panels installed roughly a decade ago, well before this conversation had the attention it does now. During a facade condition assessment tied to a refinancing process, the panel core became a specific line item the lender’s technical team flagged, not a hypothetical concern but a documented requirement before the loan renewal would proceed on the terms the owner wanted. Re-cladding an entire building is a meaningfully larger undertaking than specifying the right core at the outset would have been, and that gap between original cost and retrofit cost is really the argument for getting this right the first time on any new project rather than treating it as something to revisit later if it ever comes up.

Certification Is Worth Checking Directly, Not Assuming

FR and A2 claims on a manufacturer’s data sheet are only as reliable as the testing behind them, and this is an area worth verifying rather than taking on trust. NABL-accredited lab certification is the commonly accepted proof of compliance within India, and international reference standards like EN 13501 or ASTM E84 sometimes appear on manufacturer literature as well, though it’s worth confirming which specific test method and classification a given certificate actually covers rather than assuming any fire-related certificate automatically means the same thing across different manufacturers and markets.

Ask specifically for the test certificate tied to the exact panel thickness and core grade being quoted, not a general brand-level fire rating claim, since core composition and therefore fire performance can genuinely vary across a manufacturer’s product range even under the same brand name.

The Panel Isn’t the Only Thing That Matters

Core material gets most of the attention, understandably, but installation detailing plays a real role in overall facade fire performance too, and it’s worth not letting the core conversation crowd out this part entirely. The air gap behind a rainscreen-style ACP installation, present in most modern cladding systems for ventilation and moisture management, can itself become a path for fire and smoke to travel vertically up a facade if it isn’t properly interrupted at intervals with fire-stopping barriers. A building specified with genuinely non-combustible A2 panels but installed without proper cavity fire-stopping hasn’t actually solved the whole problem, just one part of it.

This is really a design and installation quality issue as much as a materials one, and it’s worth asking your facade contractor directly whether cavity fire-stopping is included in the installation detailing, particularly on taller buildings where an uninterrupted vertical air gap behind the cladding represents a genuine risk regardless of how good the panel material itself is.

What This Means for a Project Being Specified Right Now

For any new commercial or high-rise residential project, specifying FR or A2 core cladding from the outset costs more than standard PE core, but meaningfully less than the alternative of retrofitting later once either a code change forces it or an incident makes the risk impossible to ignore. For existing buildings clad in older standard panels, a facade condition assessment that specifically evaluates core material, not just weathering and finish, is worth commissioning proactively rather than waiting for an insurer, lender, or fire authority to raise it first.

Quick Answers

Is PE core ACP cladding illegal in India now?

Not universally banned nationwide as of now, since NBC provisions become enforceable when specific states or municipalities adopt them. The regulatory direction is clearly moving against it though, and many facade consultants recommend FR or A2 core as the safer default regardless of current local enforcement status.

What’s the difference between FR core and A2 core panels?

FR core uses mineral fillers to slow burning and reduce smoke. A2, using the European classification many Indian certifications reference, is built to be close to non-combustible, a stronger standard than FR.

Can existing PE core cladding be identified without removing panels?

Sometimes through documentation from the original installation, otherwise a facade assessment or limited sample testing is usually needed to confirm core composition with certainty.

Does upgrading to FR or A2 core cost significantly more?

Yes, generally, though the gap is far smaller than the cost of retrofitting an entire building’s cladding later if a code change or insurance requirement forces the issue.

Send us your building’s cladding specification or installation records, and we’ll help you understand honestly where it stands against current fire safety expectations before an insurer or lender raises it for you.