Why Corrugated Polycarbonate Is the First Choice for Factory Daylighting
For industrial buildings in 2026, corrugated polycarbonate (PC) sheets have become the most cost-effective way to bring natural light into factories, warehouses and workshops. Clear corrugated PC transmits up to 88% of visible light, weighs about 50% less than fiberglass (FRP) of the same thickness, and carries a 15-year UV warranty — which is why it is now the standard replacement for aging fiberglass skylights on industrial roofs.
The bottom line is simple: if you are renovating an old factory roof or planning a new warehouse, corrugated PC sheets cut daytime lighting costs, improve worker comfort and outlast FRP by years — at a competitive installed cost.
Corrugated PC Sheet Specifications
As a manufacturer, Jietai produces corrugated PC sheets in a full range of standard wave profiles and thicknesses. The table below shows the range we offer for factory daylighting projects.
| Parameter | Standard Range |
|---|---|
| Thickness | 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm |
| Wave Profiles | 840, 900, 930, 970, 1050, 750, 820 |
| Effective Width | 840mm, 900mm, 930mm, 1050mm |
| Overall Width | 900mm, 960mm, 1000mm, 1100mm |
| Wave Height | 20-50mm |
| Length | Custom per project (up to 12m) |
| Colors | Clear, Blue, Green, Bronze, Opal, Custom |
| Light Transmission | 25%-88% |
| Fire Rating | B1 (GB 8624), UL94 V-2 |
Corrugated PC vs FRP vs Glass
The table below compares corrugated polycarbonate against the two materials it most often replaces on industrial roofs.
| Property | Corrugated PC | FRP | Glass |
|---|---|---|---|
| Light transmission | Up to 88% | 60-70% (declines with age) | Up to 90% |
| Weight | ~50% lighter than FRP | Heavier | Heavy |
| Impact behavior | Won’t shatter | Cracks over time | Shatters into shards |
| UV aging | 15-year warranty | Yellows within a few years | Stable |
| Fire behavior | B1, self-extinguishing | Combustible | Non-combustible |
Where Factory Daylighting Pays for Itself
Corrugated PC sheets are used across a wide range of industrial and commercial daylighting applications in 2026:
- Factory and warehouse daylighting strips on pitched steel roofs
- Corridor and walkway skylights between building blocks
- Loading bays, carports and canopy covers
- Agricultural and livestock housing roofs
- Fencing and enclosure panels
Installation Best Practices
To get the full 15-year service life from corrugated PC daylighting, follow these rules on site:
- Match the wave profile to the existing steel sheet (840 with 840, 900 with 900) so the panels drop into the same purlin spacing.
- Add EPDM gaskets at every overlap to keep water out without over-tightening.
- Keep a roof slope of at least 5% (1:20) for fast drainage.
- Leave a small allowance for thermal expansion so panels never buckle in summer heat.
Frequently Asked Questions
What thickness of corrugated polycarbonate is best for factory daylighting?
For most factory daylighting strips, 1.2mm to 2.0mm is the common range, with 1.5mm the most popular balance of strength and light transmission. For larger spans or high-wind areas, 2.0-3.0mm adds extra rigidity.
How long do corrugated polycarbonate sheets last on an industrial roof?
With the co-extruded UV protection layer, corrugated PC sheets carry a 15-year warranty against yellowing and loss of light transmission, and in practice can last 15-20 years or more — far longer than FRP, which often yellows within 3-5 years.
Is corrugated polycarbonate fire-safe for factory use?
Yes. Standard corrugated PC sheets meet the B1 fire rating (GB 8624) and UL94 V-2, and are self-extinguishing. They do not support combustion the way FRP does, and they never shatter into dangerous shards like glass.
Can corrugated polycarbonate replace existing FRP skylights?
Yes — this is the most common retrofit. PC corrugated sheets are about 50% lighter than FRP and match common steel wave profiles (840/900), so they drop into the existing purlin spacing with minimal structural changes.
How much natural light does corrugated PC transmit?
Clear corrugated PC transmits up to 88% of visible light, while opal and diffused colors transmit 25-60%. That is enough to light a factory floor during daylight hours and cut artificial lighting costs.
Contact our team for a quote.
