Fire-Rated ACP Cladding in Gujarat: FR B1 vs A2 Grades, NBC Rules and Costs

Walk past a new commercial block on SG Highway, a factory office in Savli GIDC or a hospital extension in Vadodara, and there is a good chance the front elevation is wrapped in aluminium composite panel (ACP). It is light, quick to install and looks sharp. What most building owners never see is the core sandwiched between the two aluminium skins — and that core decides whether the facade slows a fire down or feeds it.

Since the Rajkot TRP game zone fire in May 2024, fire departments across Gujarat have tightened Fire NOC and renewal inspections, and facade documentation is increasingly part of that conversation. This guide explains the three ACP grades on the market, what the National Building Code expects, what each grade costs in Gujarat in 2026, and the site mistakes that quietly undo a fire-rated specification.

What is the difference between standard, FR B1 and FR A2 ACP?

Every ACP panel is two thin aluminium skins (typically 0.3–0.5 mm each) bonded to a core, usually 4 mm in total thickness for facades. The fire grade is defined entirely by that core:

• Standard ACP (LDPE core): a polyethylene plastic core. It is combustible — Class E under EN 13501-1. Acceptable for signage and some interior features, not for a commercial building facade.

• FR B1 (mineral-filled core): a core heavily loaded with inorganic mineral fillers. Limited combustibility — typically Class B-s1,d0. Common on low-rise commercial and industrial buildings.

• FR A2 (high-mineral or aluminium corrugated core): around 90% inorganic content, or a corrugated aluminium core. Class A2-s1,d0 — close to non-combustible. The “s1” means low smoke and “d0” means no flaming droplets.

The visible face — PVDF or polyester coating, colour, texture — is identical across all three grades. You cannot tell them apart by looking at a finished elevation, which is exactly why substitution happens on site.

What does NBC 2016 require for facade cladding?

Part 4 (Fire and Life Safety) of the National Building Code 2016 expects facade and cladding materials on high-rise buildings — 15 m and above — to be non-combustible or of limited combustibility, with fire-stopping at every floor where the cladding creates a cavity. In practice, fire consultants and fire officers read this as A2-class material for buildings of 15 m and above, and at least FR B1 for low-rise commercial, institutional and industrial buildings.

In Gujarat, the Gujarat Fire Prevention and Life Safety Measures Act, 2013 makes a Fire NOC mandatory for commercial, industrial and high-rise buildings, with periodic renewal. When the facade comes up during inspection, three documents carry the weight:

• The manufacturer’s fire classification report (EN 13501-1 or equivalent) from an accredited laboratory

• Batch-wise test certificates for the material actually supplied

• Delivery challans and invoices proving that the panels on the building are the panels that were tested

Interpretation rests with the local Chief Fire Officer, so confirm the requirement for your building’s height and occupancy at design stage — not after the panels are up.

How much does fire-rated ACP cladding cost in Gujarat?

Indicative material-only rates in 2026 for 4 mm panels with PVDF finish from established manufacturers:

• Standard LDPE ACP: roughly ₹60–140 per sq ft

• FR B1: roughly ₹110–250 per sq ft

• FR A2 / corrugated core: roughly ₹160–350 per sq ft

Installed cost adds the sub-frame, brackets, sealant, cavity fire-stops, scaffolding and labour. On typical Ahmedabad and Vadodara commercial elevations this usually adds ₹100–180 per sq ft, depending on height, access and design complexity.

Put the upgrade in perspective: on a 5,000 sq ft facade, moving from FR B1 to FR A2 adds roughly ₹2.5–5 lakh at material level. That is usually a small fraction of the building’s cost — and far less than a delayed NOC, an insurance dispute or a forced re-cladding.

Five site mistakes that defeat a fire-rated specification

1. Grade substitution after approval. Drawings say FR A2; site receives cheaper FR B1 or LDPE from the same brand family. Insist on batch numbers printed on panel backs and match them to the test certificate before installation.

2. Combustible insulation behind the panel. An A2 panel fixed over polyethylene foam or XPS board is not an A2 facade. Use mineral wool, or leave a ventilated cavity.

3. Missing cavity fire-stops. The air gap behind ACP acts like a chimney. Fire barriers at each floor slab and around window openings are what stop vertical fire spread.

4. Weak or corroding sub-frames. Untreated timber battens and light GI sections fail in Gujarat’s monsoon humidity and in coastal belts like Bharuch, Dahej and Kutch. Use powder-coated aluminium or hot-dip galvanised steel designed for wind load.

5. Cladding over services without detailing. AC outdoor units, duct louvers and electrical risers behind the facade need clearances and non-combustible enclosures — not just a panel screwed over them.

Which ACP grade should you specify?

• Low-rise offices and commercial buildings under 15 m: FR B1 minimum; FR A2 if the fire officer or insurer asks for it.

• Commercial towers, hospitals, hotels, schools and any building 15 m or above: FR A2.

• Pharma, chemical and process plants: FR A2 near solvent stores, boiler houses and electrical rooms. Many insurers and corporate EHS teams now set internal standards stricter than NBC — check before you tender.

• Interior feature walls and signage: FR grade in lobbies, corridors and escape routes; standard ACP only where no fire separation is involved.

Frequently asked questions

Is ACP cladding banned in India?

No. Standard polyethylene-core ACP is unsuitable for high-rise and commercial facades under NBC fire provisions, but tested FR B1 and FR A2 panels are widely used and accepted when installed correctly.

How can I check whether the ACP on my site is genuinely fire-rated?

Ask for the classification report and batch certificates, check the printed batch codes on panel backs, and inspect a cut offcut. An LDPE core is a uniform soft plastic you can dent with a fingernail; a mineral FR core is grey, gritty and brittle; an A2 corrugated core shows aluminium fluting.

Can an existing LDPE ACP facade be upgraded without full demolition?

Often, yes. If the sub-frame is sound and corrosion-free, panels can be replaced in phases with FR A2 material, and cavity fire-stops added during the same work.

Need a fire-compliant ACP facade in Ahmedabad or Vadodara?

Sisco Profiles has delivered civil, interior and facade works across Gujarat since 1997, including ACP cladding for commercial, pharmaceutical and industrial buildings. We specify the right grade for your building’s height and occupancy, supply batch-traceable material, and install with engineered sub-frames and cavity fire-stops so the facade stands up to inspection.

Call 9998730549 or visit www.siscoprofiles.co.in to book a site visit and facade assessment.

Looking for expert interior fit-out services in Gujarat? Contact Sisco Profiles for false ceiling, glass partitions, MEP, and turnkey contracting across Vadodara, Ahmedabad, Surat, and Gujarat.

Explore our completed projects and our range of interior services to learn more about Sisco Profiles.

Looking for expert interior fit-out services in Gujarat? Contact Sisco Profiles for false ceiling, glass partitions, MEP, and turnkey contracting across Vadodara, Ahmedabad, Surat, and Gujarat.

Explore our completed projects and our range of interior services to learn more about Sisco Profiles.