Baoding Sinhai Sunboard Manufacturing Co., Ltd. produces the transparent corrugated PC sheet 840mm width waterproof roof out of 100% virgin polycarbonate. Clear sheets provide light transmission of up to 88% and operating temperature range of -40°C to +120°C with impact resistance around 250 times greater than tempered glass. The effective width of 840mm is compatible with the usual purlin spacing in the industry, which reduces the number of seams and makes installation easier. Sinhai has three production bases and 25 production lines and has been involved in the PC sheet manufacturing business for over 30 years.
Standard glass roofing is heavy and fragile. Many poorer quality plastic sheets turn yellow in a few years and let water in at fastening spots. The solution to these problems is via material selection and profile design.
The corrugated wave design boosts flexural strength and directs rainfall away from the roof surface effectively. The installation, along with a one wave overlap system and EPDM sealing washers, provides a continuous watertight barrier at each sheet connection.
The UV protection layer, 50 to 100 microns thick, is applied by co-extrusion not post-coating, hence it is an element of the sheet structure rather than a surface treatment. It covers one or two sides depending on project needs, and is intended to maintain colour shift (ΔE) below 5 units during 10 years of outdoor exposure.
| Parameter | Details |
|---|---|
| Effective Width | 840mm (930 / 960 / 1050mm available) |
| Thickness | 0.75mm – 3.0mm |
| Light Transmission | Up to 88% (clear); 85%–92% range |
| Density | 1.2 g/cm³ |
| Temperature Range | -40°C to +120°C |
| UV Protection Layer | 50–100 micron co-extruded, 1 or 2 faces |
| Waterproof System | One-wave overlap + EPDM sealing washers |
| Raw Material | 100% virgin resin; SABIC / Bayer or customized |
| Colors Available | Transparent, Bronze, Grey, Opal, Lake Blue, Amber, Dark Blue, Silver, Orange, Yellow, or custom |
| MOQ | 500 m² |
| Lead Time | 7–15 days |
| Packing | PE film both sides + wooden pallet |
| Certifications | ISO 9001:2015, CE, RoHS, UDEM |
Every sheet starts with 100% virgin polycarbonate resin. Buyers can choose standard virgin material, imported SABIC or Bayer resin, or specify a custom material grade for OEM projects.
The UV layer is applied through co-extrusion, not post-coating. The protection is bonded into the sheet surface during production and covers one or two faces at 50–100 microns depending on project climate and exposure conditions.
Under normal outdoor conditions with proper installation, this construction is designed to maintain sheet clarity and resist surface brittleness over an extended service period consistent with the 10-year ΔE specification.
The corrugated wave geometry distributes load across the profile, contributing to improved flexural strength compared to flat sheet designs. This makes the profile suitable for applications where snow accumulation or wind loading is a consideration.
Impact resistance is approximately 250 times that of tempered glass, making the material more tolerant of hail, falling debris, and incidental mechanical contact than glass alternatives.
Quality checks applied before shipment include:
The transparent corrugated PC sheet 840mm width waterproof roof is used across three primary project categories.
Industrial Skylighting— These sheets are used in factories and warehouses to substitute opaque roofing panels, introduce natural daylight and reduce dependency on artificial lighting. The material is also resistant to chemical vapours and the structural vibration seen in industrial situations.
Commercial Greenhouses – 840mm effective width for huge spans and fewer joints. The sheet diffuses light over the planting areas and maintains structural performance under temperature change and wind stress.
Public Infrastructure — against bus terminals and train stations to covered walkways, the sheet's watertight joint system and load-bearing profile protect against the elements in high-traffic areas.
Other uses include carports, garden shelters, pergolas, canopies and corridor roofs.
Over 70 standard profile molds are available, including trapezoidal, round wave, and other regional profiles. This range allows the sheet to match existing metal roof structures without custom tooling in most cases.
OEM and ODM services are supported. Available processing options include CNC cutting, custom film coatings, smaller-size cutting, bending, special-shaped cuts, and 3D design assistance. Profile samples are confirmed before mass production begins.
Sinhai has three manufacturing sites with 25 production lines, encompassing an area of more than 50,000 m² with an annual output of more than 60,000 tonnes. Standard orders ship in 7 days or less.
The Kashgar manufacturing site cuts the truck travel time to around 7 days for Central Asian consumers. Local warehouse resources in Tashkent and Dushanbe provide regional fulfilment for recurrent orders.
For transparent corrugated PC sheet 840mm width waterproof roof orders, we can send by sea, truck and air. Our logistical service includes customs clearance and cross-border documents.
Q1: Will this sheet fit my existing metal roof profile?
A: Over 70 profile molds are available, covering trapezoidal, round wave, and other standard roofing profiles used globally. Provide your existing profile dimensions and we can confirm compatibility before production.
Q2: Does polycarbonate expand and contract with heat?
A: Yes. PC has a measurable thermal expansion coefficient. Pre-drilling holes 2–3mm larger than the screw diameter allows the sheet to move with temperature changes without cracking at fastener points.
Q3: How many screws are needed per sheet?
A: For the 840mm effective width, fixing at the crest of each wave at each purlin line is the standard approach. Fastening at the crest prevents water from pooling at the screw point. Specific screw count depends on purlin spacing and local wind load requirements.
Q4: Can the sheet handle heavy snow loads?
A: The corrugated wave geometry distributes load across the profile cross-section, improving flexural performance compared to flat sheets. Suitability for specific snow load conditions depends on thickness selection, purlin spacing, and applicable local building codes.
Q5: Can it be used on a curved roof?
A: Longitudinal curving is possible. The minimum bending radius depends on the wave profile — typically around 4 meters for standard wave designs — and should be confirmed for the specific profile selected.
Q6: How long will the sheet stay clear without yellowing?
A: Sheets with a 50μm co-extruded UV layer are designed to maintain a color shift (ΔE) of less than 5 units over 10 years of outdoor exposure. This is evaluated using the ASTM D1925 Yellowness Index method.
Do you have more questions about transparent corrugated pc sheet 840mm width waterproof roof? For quotes or product inquiries, email [email protected].
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