Face skin
The visible sheet, usually 3003, 5005 or 5052 aluminium 0.7 – 1.5 mm thick, coil-coated with PVDF or FEVE paint, anodised, printed with wood or stone patterns, or faced with a thin natural stone veneer.
Architectural panels guide
Decorative Aluminium Honeycomb Panels
A decorative aluminium honeycomb panel bonds a painted, anodised or stone-faced aluminium skin to a lightweight aluminium honeycomb core and a back sheet, giving a large, very flat panel that weighs a fraction of solid sheet or stone. Architects use them for feature walls, ventilated façades, large-format ceilings and raised floors. This guide covers how the panels are built, which skins and cores to specify, typical sizes and weights, and how to choose between honeycomb, composite and solid aluminium panels. Metline supplies honeycomb panels, cores and skin sheet to fabricators and project buyers worldwide.
- Skins
- 3003, 5005, 5052, 0.5 – 2.0 mm
- Core
- 3003 or 5052 honeycomb
- Panel thickness
- 10 – 30 mm typical (walls, ceilings)
- Finishes
- PVDF, FEVE, anodised, wood, stone
What makes up a decorative honeycomb panel
A honeycomb panel works like an I-beam spread over an area. The two aluminium skins carry bending loads in tension and compression, and the honeycomb core holds them apart and carries shear. Doubling the core thickness roughly quadruples bending stiffness while adding very little weight.
Honeycomb core
Expanded aluminium foil in 3003 or 5052, formed into hexagonal cells typically 6 – 19 mm across. Cell size and foil gauge set the core density, compressive strength and shear stiffness. See the aluminium honeycomb core guide.
Back skin
Usually 0.5 – 1.0 mm aluminium, thicker or reinforced for floors. Ceilings sometimes use FRP or lighter backs to save weight.
Bond
Most decorative panels are laminated with a structural adhesive film under heat and pressure. Brazed panels join skin and core metallurgically with no adhesive, for maximum heat resistance; see brazed honeycomb panels.
Edges
Panel edges are folded, fitted with extruded aluminium edge profiles or sealed, depending on the fixing system. Back-bolt inserts or fixing cleats are set into the panel for concealed fixing.
Optional layers
Perforated face skins with an acoustic fleece behind them turn the panel into a sound absorber for ceilings and walls.
Why designers choose honeycomb panels
- Flatness over large formats: the stiff core keeps panels of several square metres flat without visible "oil-canning", which solid sheet cannot achieve at the same weight
- Low weight: a 20 mm panel weighs roughly 5 – 7 kg/m², compared with about 54 kg/m² for 20 mm granite, which simplifies sub-frames and fixings
- Stone look without stone weight: 3 – 5 mm stone veneers bonded to honeycomb reduce weight and breakage risk compared with solid stone cladding
- Fire performance: with an all-aluminium core and a low-combustible adhesive, panels can achieve high reaction-to-fire classes, subject to testing of the actual build-up
- Weather and corrosion resistance: aluminium skins and core do not rot, swell or rust, so the panels suit exterior and humid interior use
- Recyclability: panels are largely aluminium, which retains its value at end of life
Choosing skin alloy and finish
| Skin alloy | Character | Best for |
|---|---|---|
| 3003-H14 / H24 | Good formability and corrosion resistance at moderate cost | Interior walls and ceilings, painted façades in normal climates |
| 5005-H14 / H34 | Anodises evenly; colour consistent across panels | Anodised panels and metallic finishes |
| 5052-H32 / H34 | Stronger and more resistant to salt air | Coastal façades, high wind loads, floors and transport interiors |
| Finish | Description | Typical location |
|---|---|---|
| PVDF (fluorocarbon) | Two- or three-coat fluoropolymer paint with high UV and chalk resistance | Exterior façades and soffits |
| FEVE | Fluoropolymer coating with high gloss retention and wide colour range | Exterior and high-end interiors |
| Polyester | Economical coil coating | Interior walls and ceilings |
| Anodised | Clear or coloured oxide finish on 5005 skins | Metallic feature walls, lift lobbies |
| Wood and stone grain | Printed or heat-transfer patterns over a base coat | Interior décor, ceilings, warm façade accents |
| Natural stone veneer | Thin marble, granite or slate bonded to the face | Lobbies, feature walls, lightweight stone façades |
| Mirror or brushed | Polished or brushed skin, often with protective lacquer | Interiors and signage |
For exterior work, specify a coating that meets AAMA 2605 or an equivalent coil-coating standard and ask for coating test data. Approve colour on physical samples from the production coating lot. Metline also supplies the colour-coated skin sheet and coil used by panel laminators.
Typical sizes, thicknesses and weights
Typical supply range
- Panel thickness
- 10 – 30 mm for walls and ceilings; 20 mm and above for floors, configured to the load
- Face / back skin
- 0.7 – 1.5 mm face, 0.5 – 1.0 mm back; thicker skins for floors and high wind loads
- Panel size
- Widths up to about 1500 mm and lengths up to about 6000 mm; 1220 × 2440 mm (4 × 8 ft) is common
- Core cell size
- Typically 6 – 19 mm; smaller cells for thin skins and stone, to avoid telegraphing
- Shapes
- Flat, curved, folded trays, corners and irregular cut shapes to drawing
- Machining
- Routing, edge folding, perforation, back-bolt and insert holes
Panel weight is dominated by the skins. The table estimates skin and core weight for common build-ups, using aluminium at 2.70 g/cm³ and a core density of 60 kg/m³; add the adhesive film and any finish or edge profiles. Ask for the manufacturer's datasheet for the exact figure.
| Total thickness (mm) | Face skin (mm) | Back skin (mm) | Core (mm) | Skins (kg/m²) | Core (kg/m²) |
|---|---|---|---|---|---|
| 10 | 1 | 0.5 | 8.5 | 4.1 | 0.51 |
| 15 | 1 | 0.7 | 13.3 | 4.6 | 0.80 |
| 20 | 1 | 0.7 | 18.3 | 4.6 | 1.10 |
| 20 | 1.5 | 1 | 17.5 | 6.8 | 1.05 |
| 25 | 1.5 | 1 | 22.5 | 6.8 | 1.35 |
| 30 | 2 | 1 | 27 | 8.1 | 1.62 |
Where decorative honeycomb panels are used
| Application | Typical build-up | Points to specify |
|---|---|---|
| Ventilated façades and soffits | 20 – 25 mm, 1.0 – 1.5 mm PVDF face, 0.7 – 1.0 mm back, 5052 or 3003 skins | Wind load, fixing system, fire class required by local code, coating standard |
| Interior feature walls | 10 – 20 mm with wood, stone grain, anodised or veneer face | Flatness, joint width, impact resistance at low level |
| Large-format ceilings | 10 – 15 mm, light back skin or FRP, optional perforation | Weight per panel, access, acoustic performance, cut-outs for services |
| Raised and access floors | 20 mm and above, thicker skins and denser core | Concentrated and distributed load, span between supports, surface finish |
| Lift interiors, signage and displays | 6 – 12 mm with mirror, brushed or printed face | Edge finish and fixing |
| Partitions and furniture | 15 – 25 mm with decorative face both sides | Double-sided finish, edge profiles |
For floors and other structural uses, panel thickness, core density and support spacing must be sized for the specific loads and verified by testing or calculation; decorative wall build-ups should not be used as flooring without that check. Honeycomb is also used in aircraft and rail interiors, where different certifications apply; see aircraft honeycomb panels.
Honeycomb panel vs aluminium composite panel vs solid sheet
| Factor | Honeycomb panel (20 mm) | Aluminium composite panel (4 mm) | Solid aluminium sheet (3 mm) |
|---|---|---|---|
| Structure | Aluminium skins on aluminium honeycomb | Aluminium skins on polymer or mineral-filled core | Single sheet, stiffened by folds or ribs |
| Flatness on large panels | Excellent | Good on moderate sizes | Needs stiffeners to avoid waviness |
| Weight | About 5 – 7 kg/m² | About 5.5 – 8 kg/m², depending on core | About 8.1 kg/m² |
| Fire behaviour | Depends on adhesive; all-metal core | Depends strongly on core (PE, FR or A2 mineral) | Non-combustible metal |
| Stone facing | Yes, common | No | No |
| Curving and folding | Possible, needs care | Easy (routed and folded) | Easy |
| Relative cost | Higher | Lower | Medium |
Choose honeycomb when the panel is large, must stay perfectly flat, carries a stone face, or must meet a strict fire requirement without a polymer core. Choose composite panels for economical routed-and-folded cassettes, and solid sheet for small panels and complex folded shapes. Related: aluminium honeycomb panel supply, stone honeycomb panels and aluminium wall panel materials.
How to specify decorative honeycomb panels
- Application and code requirementsLocation (façade, wall, ceiling, floor), design wind or floor loads, and the reaction-to-fire class required (for example under EN 13501-1 or local codes).
- Build-upTotal thickness, face and back skin alloy and thickness, core alloy, cell size and foil gauge, bonding method.
- FinishCoating type and colour reference or stone type, gloss, protective film.
- GeometryPanel schedule with sizes, shapes, edge details, folds, perforations and fixing inserts, or shop drawings.
- Documents and termsMaterial certificates for skins and core, coating and fire test reports, samples for approval, packing and delivery terms (EXW, FOB, CIF or DAP).
References and standards
- EN 13501-1 – Fire classification of construction products and building elements: reaction to fire
- ASTM B209 – Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
- ASTM C393 – Core shear properties of sandwich constructions by beam flexure
- AAMA 2605 – Superior performing organic coatings on aluminium extrusions and panels
- EN 1396 – Coil coated sheet and strip for general applications
Decorative aluminium (aluminum) honeycomb panels: FAQ
How thick are decorative aluminium honeycomb panels?
Wall and ceiling panels are usually 10 – 30 mm thick, with 15 – 25 mm common for façades. Floors and other load-bearing uses are thicker and are sized to the load and support spacing.
How much does an aluminium honeycomb panel weigh?
A typical 20 mm façade panel with a 1.0 mm face and 0.7 mm back weighs roughly 5 – 7 kg/m², most of it in the skins. That is about one tenth of the weight of solid stone of the same thickness.
Are honeycomb panels fireproof?
No building panel is simply "fireproof". Aluminium honeycomb panels have an all-metal core, and with a suitable adhesive they can reach high reaction-to-fire classes such as A2-s1,d0 under EN 13501-1, but the class must be proven by tests on the specific build-up.
Can honeycomb panels be curved or folded?
Yes. Panels can be rolled to curves and folded into trays or corners with the core relieved at the bend, although minimum radii depend on thickness and skin alloy. Curved panels should be confirmed at the design stage.
What is the difference between honeycomb panels and aluminum composite panels?
Composite panels (ACP) are thin, typically 3 – 6 mm, with a solid polymer or mineral core, and are routed and folded into cassettes. Honeycomb panels are thicker and stiffer for their weight, stay flat in larger sizes and can carry stone facings.
Can I order only the honeycomb core or skin sheet?
Yes. Metline supplies honeycomb core in 3003 and 5052 and coated or anodising-quality skin sheet and coil separately for panel manufacturers.
Specifying decorative honeycomb panels?
Send your panel schedule, build-up, finish and destination. Our team will reply with options, samples and a delivered price.
