ACP (Aluminium Composite Panels) — Complete Guide
ACP (Aluminium Composite Panel) is the most popular modern facade cladding material — a sandwich panel of two thin aluminium skins bonded to a polymer / mineral core. Lightweight, flat, rigid, weather-resistant and available in countless colours & finishes, ACP gives buildings a sleek, contemporary look at low cost & fast installation. It dominates commercial facades, signage, showrooms, and modern residential elevations.
Important: after major facade fires worldwide, FR (Fire-Retardant) and A2 non-combustible core ACP are now mandated for facades. Major brands: Alstrong, Aludecor, Eurobond, Alucobond, Alstone, Viva, Timex, Abuiltd.
What is ACP?
ACP consists of two 0.25–0.50 mm aluminium skins thermo-bonded to a 2–5 mm core. The aluminium gives durability & finish; the core gives rigidity & lightness. The standard panel is 4 mm thick (0.5 mm Al + 3 mm core + 0.5 mm Al). The exterior face is coated (PVDF / PE) for weather resistance.
Key Characteristics
- Lightweight & rigid
- Flat, smooth surface
- Weather & UV resistant (PVDF)
- Wide colour / finish range
- Easy to cut, bend, route & fold
- Fast installation
Core Types (Fire Safety)
| Core | Description | Fire Rating |
|---|
| PE (Polyethylene) Core | Standard polymer core (combustible) | Non-FR (interior / signage only) |
| FR (Fire Retardant) Core | Mineral-filled core | FR / B1 (facades) |
| A2 Non-Combustible Core | > 90% mineral core | A2-s1, d0 (high-rise facades) |
Use FR / A2 core ACP for all building facades. Standard PE-core ACP is combustible & has caused major facade fires — it should only be used for interior / signage. Most codes & NBC 2016 now require FR or A2 non-combustible core for exterior cladding.
Coatings & Finishes
| Coating / Finish | Description | Use |
|---|
| PVDF (Kynar 500) | Premium fluorocarbon, UV-stable | Exterior facades (best) |
| PE (Polyester) | Economical coating | Interior / signage |
| Solid Colours | Plain colours | Modern facades |
| Metallic / Sparkle | Shimmer effect | Premium |
| Wood / Stone / Marble Finish | Printed natural look | Designer facades |
| Mirror / Brushed | Reflective metallic | Feature accents |
| Nano / Self-Cleaning | Dirt-resistant | Premium facades |
Properties
| Property | Value |
|---|
| Panel Thickness | 3, 4, 6 mm (4 mm standard) |
| Aluminium Skin | 0.25, 0.30, 0.50 mm |
| Panel Size | 1220 x 2440 / 3050 / 4880 mm |
| Weight (4 mm) | ~5.5 kg/m² |
| Coating | PVDF (exterior) / PE (interior) |
| Temperature Resistance | −50 to +80 °C |
| Sound Insulation | Moderate |
| Lifespan | 15–20 years |
Fixing Methods
- Tray / Cassette Panel: Folded panel fixed to aluminium framework (standard facade)
- Structural Glazing Style: Bonded to frame with structural adhesive
- Mechanical Fixing: Screws / rivets to sub-frame
- Aluminium Sub-Frame: Vertical / horizontal members anchored to wall
- Provides ventilated cavity (rainscreen) for drainage & thermal performance
ACP vs Other Facades
| Parameter | ACP | HPL | Stone | Fiber Cement |
|---|
| Weight | Light | Light | Heavy | Medium |
| Look | Metallic / printed | Wood / solid | Natural premium | Matte / textured |
| Fire (FR/A2) | FR / A2 available | FR available | Non-combustible | Non-combustible |
| Durability | 15–20 yr | 10–15 yr | 30–50 yr | 30–50 yr |
| Cost | Medium | Medium | Medium-High | Medium |
| Installation | Fast | Fast | Slow | Medium |
See HPL, stone cladding & fiber cement boards.
Top Brands
| Brand | Notes |
|---|
| Alstrong | Wide range, FR / A2 |
| Aludecor | FR & A2 panels |
| Eurobond | FR / A2 facades |
| Alucobond (3A) | Premium imported (original ACP) |
| Alstone | ACP & HPL |
| Viva / Timex | ACP panels |
| Abuiltd / Bond | ACP range |
Where to Use
- Commercial building facades
- Showroom & retail fronts
- Modern residential elevations
- Signage & branding (PE core)
- Column / pillar cladding
- Canopies & entrances
- Interior wall panelling
- False ceiling feature panels
- Petrol pumps & corporate identity
- Partition / wall cladding
Advantages
- Lightweight & rigid
- Flat, smooth, modern finish
- Weather & UV resistant (PVDF)
- Wide colour / finish range
- Easy to fabricate (cut, bend, route, fold)
- Fast installation
- Low maintenance (washable)
- Economical vs stone
- FR / A2 fire-safe options
- Ventilated rainscreen capability
- Corrosion resistant (aluminium)
Disadvantages
- PE core combustible (fire risk — use FR/A2)
- Dents on impact
- Colour fade (cheap PE coating)
- Shorter lifespan than stone (15–20 yr)
- Oil-canning (waviness) if poorly fixed
- Joints / sealant need maintenance
- Counterfeit / sub-standard panels common
- Not premium / natural look
Cost (Approximate, Indian Market, 2025-26)
| Type | Cost (per sqft) |
|---|
| PE Core ACP (interior / signage) | Rs 60 – 120 |
| FR Core ACP | Rs 120 – 250 |
| A2 Non-Combustible ACP | Rs 250 – 450 |
| Premium / Imported (Alucobond) | Rs 300 – 600 |
| Wood / Stone Finish ACP | Rs 150 – 350 |
| ACP Facade Installed (with frame) | Rs 200 – 450 |
Best Practices
- Use FR / A2 non-combustible core for all facades (fire safety)
- Use PVDF coating for exterior (UV-stable, fade-resistant)
- Use proper aluminium sub-frame anchored to wall
- Maintain ventilated cavity (rainscreen)
- Use SS fasteners & quality structural sealant
- Design panel joints with expansion allowance
- Use quality silicone for joints (weatherproofing)
- Avoid over-tensioning (oil-canning / waviness)
- Buy genuine branded FR panels (verify core)
- Provide drainage / weep holes
- Use a facade engineer for high-rise design
- Follow NBC 2016 fire requirements for high-rise
Applicable Standards
| Standard | Description |
|---|
| IS 14517 | Aluminium Composite Panels |
| EN 13501-1 | Fire Classification (A2 / B) |
| ASTM E84 | Surface Burning Characteristics |
| ASTM D1781 | Bond Strength (peel) |
| ASTM E330 | Wind Load on Cladding |
| NBC 2016 Part 4 | Fire & Life Safety — Facades |
Conclusion
ACP is the go-to modern facade cladding — lightweight, sleek, versatile and economical, with countless finishes from solid colours to wood / stone looks. The single most important rule: use FR or A2 non-combustible core for all building facades (PE core is a serious fire hazard). Use PVDF coating for exterior durability, a proper ventilated sub-frame, quality sealants, and follow NBC fire requirements.
For natural premium facades, see stone / brick cladding; for wood-look durable panels, HPL, wood cladding or fiber cement boards; for ceramic facades, terracotta tiles.