Interlocking Polycarbonate Panel Specifications at a Glance
If you are specifying interlocking polycarbonate (PC) panels in 2026, the numbers that matter are straightforward: a standard module width of 500 mm, thicknesses from 10 mm to 50 mm, and a standard 6 m length with custom runs up to 16.5 m. The panels interlock through a tongue-and-groove (male-female) joint and need no metal joining profiles, which is what makes them the go-to system for curtain walls, shop fronts and backlit signage.
The bottom line: interlocking PC panels are a factory-made, snap-together cladding system for vertical facades — light, translucent, impact-resistant and fast to install — and they are not designed for flat outdoor roofs.
Complete Interlocking Polycarbonate Panel Specification Table
As a manufacturer, Jietai extrudes the full interlocking range below. These values are industry-standard for tongue-and-groove polycarbonate panel systems; custom sizes and colours are available on request.
| Parameter | Standard Range |
|---|---|
| Module Width | 500 mm (standard) |
| Thickness | 10, 12, 16, 20, 25, 30, 40, 50 mm |
| Standard Length | 6 m (custom 1-12 m; up to 16.5 m) |
| Structure | 3-wall, 5-wall X-reinforced, honeycomb / cross-cell multi-cavity, 9-cavity |
| Joint | Tongue-and-groove interlock (no metal profiles) |
| U-value | 0.71-3.5 W/m2K (by thickness) |
| Light Transmission | 20-82% (by thickness and colour) |
| Weight | 2.0-8.0 kg/m2 (by thickness) |
| UV Protection | Co-extruded UV layer, 30-50 um, both sides |
| Fire Rating | B1 (GB 8624), UL94 V-2, Euroclass B-s1,d0 |
| Service Temperature | -40 C to +120 C |
| Colours | Clear, opal, bronze, lake blue, grass green, grey, pink diffusion, glass-grey diffusion, custom RAL |
Thickness, Structure and Performance Reference Table
The table below maps each thickness to its internal structure, thermal performance and typical facade application. Heavier multi-cavity builds (40-50 mm) are for high-performance and cold-climate curtain walls.
| Thickness | Structure | Cavities | U-value | Light Transmission | Typical Use |
|---|---|---|---|---|---|
| 10 mm | 3-wall | 2 | 3.5 W/m2K | 65-82% | Light partitions, small areas |
| 12 mm | 3-4 wall | 2-3 | 3.0 W/m2K | 60-80% | Shop fronts |
| 16 mm | 5-wall X-reinforced | 4 | 2.5 W/m2K | 55-78% | Facades, pool enclosures |
| 20 mm | 5-wall X-reinforced | 4 | 2.0 W/m2K | 50-75% | Standard curtain walls, atriums |
| 25 mm | Honeycomb / cross-cell | 5-6 | 1.6 W/m2K | 45-72% | Wide-span curtain walls |
| 30 mm | Honeycomb / cross-cell | 5-6 | 1.3 W/m2K | 40-68% | High-rise curtain walls |
| 40 mm | 9-cavity | 9 | 1.0 W/m2K | 30-60% | Premium energy-saving curtain walls |
| 50 mm | Extra-thick multi-cavity | 9+ | 0.71 W/m2K | 20-55% | Cold-climate insulated curtain walls |
Sizes, Colours and Installation
Interlocking PC panels come in a 500 mm module width with a standard 6 m length; custom lengths from 1 m to 12 m are available, and long-run projects can be supplied up to 16.5 m. Our factory co-extrudes the UV protection layer on both faces (30-50 um) so the panels keep their colour and clarity outdoors, and we match standard colours — clear, opal, bronze, lake blue, grass green, grey, pink diffusion and glass-grey diffusion — plus custom RAL colours.
Installation is the fastest of any polycarbonate cladding: panels simply slide together through the tongue-and-groove joint and are fixed to the substructure, with no aluminium joining profiles or silicone required. Because the joint is a mechanical snap-fit, panels are flat and are not designed to be cold-curved.
Applications for Interlocking Polycarbonate Panels
- Curtain-wall facades and building cladding
- Shop fronts and storefront glazing
- Backlit advertising signs and light boxes
- Interior partitions and landscape feature walls
- Exhibition stands and show displays
- Balcony screens and canopy soffits
Interlocking panels are a vertical-facade system. They are not intended for large flat outdoor roofs, where a U-lock roofing system is the right choice, and they cannot be cold-curved into arches.
Why Jietai as Your Interlocking Panel Manufacturer
Jietai is a polycarbonate sheet manufacturer, not a middleman. We extrude interlocking PC panels in-house across the full 10-50 mm thickness range, apply the UV layer at the die, and cut to custom length before export. That gives you factory-direct pricing, consistent colour and thickness, and a single point of contact for specification and facade engineering support. Contact our team for a quote on your project.
Frequently Asked Questions
What is the standard width of interlocking polycarbonate panels?
The standard module width is 500 mm, which is consistent across major international and domestic brands. Custom widths are available on request, so tell us your facade module and we will confirm the closest match.
What thicknesses are available for interlocking PC panels?
Thicknesses run from 10 mm to 50 mm. Thinner 10-16 mm panels suit light partitions and shop fronts, 20-30 mm cover standard and high-rise curtain walls, and 40-50 mm are used for premium and cold-climate insulated facades.
How do interlocking panels connect to each other?
Panels join through a tongue-and-groove (male-female) interlock that snaps together without metal joining profiles or silicone. This mechanical joint is why interlocking panels install faster than most other cladding systems.
Can interlocking polycarbonate panels be used on roofs?
No. Interlocking panels are designed for vertical facades. For large flat outdoor roofs, skylights and canopies, a U-lock polycarbonate roofing system is the correct choice because it carries a full aluminium-and-EPDM sealing system.
How much light do interlocking PC panels transmit?
Light transmission ranges from about 20% to 82% depending on thickness and colour. Clear panels transmit the most (up to 82%), while thicker multi-cavity panels and darker colours transmit less, which is useful for glare control and privacy.
