Name: China Custom Multiwall Polycarbonate Sheets For Greenhouse Suppliers, Manufacturers - Factory Direct Wholesale - Unique Plastics
Brand: Unique
SKU: 274176262

Multiwall polycarbonate sheets for greenhouse

UNQ Multiwall Polycarbonate Sheets are engineered specifically for greenhouse construction, offering a perfect balance of durability, thermal insulation, and light diffusion. Made from 100% virgin polycarbonate resin, these sheets are co-extruded with UV protection to withstand years of exposure to sunlight, moisture, and harsh climates.

Available in a range of thicknesses from 1mm to 20mm, our multiwall sheets are designed with air pockets (walls) that trap heat, reduce energy costs, and maintain consistent internal greenhouse temperatures-ideal for all-season cultivation.

These sheets come in standard clear, diffused, and opal finishes, as well as custom colors. They're lightweight, easy to install, and compatible with aluminum or galvanized steel structures.

product-750-863

Product Parameter

Name	Multiwall polycarbonate sheets for greenhouse
Colour	Clear, bronze, blue, green, opal, gray or customized
Material	100% Lexan raw material polycartonate material
Surface	With 50 micron UV protection, heat resistance
Retardant standard	Grade B1 (GB Standard)
Packaging	Both sides with PE film, logo on the PE film. A customized package is available too.

Product Advantage

Feature	Benefit
🔶 UV Co-Extruded Protection	Prevents yellowing, maintains high light transmission, and extends sheet life
🔶 Thermal Insulation	Multi-layer structure reduces heat loss, saving energy during cold seasons
🔶 High Impact Resistance	200x stronger than glass, safe against hail, storms, and accidental hits
🔶 Light Diffusion Options	Promotes even plant growth by reducing hotspots and shadowing
🔶 Lightweight & Rigid	Easy to transport and install with minimal structural support
🔶 Fire Retardant & Non-toxic	Meets international safety standards for agricultural use
🔶 Anti-Drip / Anti-Fog Coating (Optional)	Prevents water droplet formation on inner surface, protects seedlings from burn risk

Product Application

UNQ hollow polycarbonate structure is lightweight with excellent impact strength and high thermal insulation. Thanks to these advantages, hollow polycarbonate sheets are the ideal material for various glazing roofs and greenhouse covers.

Polycarbonate-facade-partition

Greenhouse

Building External Wall

Shelter Skylight

Whether you're building a full-scale horticultural facility or a modular structure, UNQ multiwall sheets offer maximum ROI with minimum maintenance.

Product Dimensions

Structure of sheet	Thickness (mm)	Weight (kg/m2)	Standard value (W/m2k)	Transparency Clear (%)	Minimum bending radius(mm)
Widths * Lengths	1.22m X 2.44m, 2.1m X 5.8m, Or cut to customers
Twin-wall	4	0.90	3.96	80	700
	6	1.30	3.56	78	1050
	8	1.50	3.26	76	1400
	10	1.70	3.02	73	1750
	12	1.90	2.78	72	2100
Triple-wall	8	1.70	2.92	71	1400
	10	2.00	2.68	71	1750
	12	2.20	2.60	71	2100
	14	2.40	2.42	69	2450
	16	2.60	2.27	68	2800
Four-wall	8	1.70	2.56	71	1400
	10	2.00	2.39	71	1750
	12	2.20	2.30	70	2100
	14	2.40	2.10	69	2450
	16	2.60	2.00	68	2800
	18	2.80	1.88	66	3150
	20	3.00	1.69	63	3500
Honeycomb sheet	8	1.70	2.58	58	1400
	10	1.90	2.16	57	1750
	12	2.20	1.98	56	2100
	14	2.40	1.74	55	2450
	16	2.70	1.56	53	2800

Our factory & Equipment

Unique Plastic Manufacturer Co., Ltd. is based in Baoding, China, close to Beijing, which makes transportation and shipping very convenient. We're equipped with modern production lines and mainly produce polycarbonate sheets, including solid sheets, corrugated sheets, as well as carports, awnings, patio canopies, and greenhouses.

We focus on providing both good-quality products and reliable service. Over the years, we've built partnerships with customers from the United States, Canada, Australia, Germany, Indonesia, and more. Our products are CE certified, and we're also ISO and SGS approved, so you can trust the quality. We're always looking forward to working with more partners around the world.

China UNQ Polycarbonate sheet factory gate

Our Factory Appearance

polycarbonate Sheets processing line

Processing Area

Packaging and transportation

To ensure product integrity during long-distance shipping, each panel is covered with protective film on both sides, stacked on fumigated wooden pallets or metal racks or kraft paper, and tightly secured with strapping and edge guards. The entire load is wrapped in waterproof film to prevent moisture damage during transit. Whether by sea, land, or air, we coordinate with trusted freight partners to guarantee safe, efficient, and on-time delivery-available under FOB, CIF, or DDP terms.

Certifications

UNQ's multiwall polycarbonate sheets are backed by a full suite of international certifications, including SGS, CE, and ISO 9001. These certifications confirm our commitment to quality control, environmental responsibility, and product safety-ensuring every sheet meets the strict standards required for global greenhouse and construction projects. Whether you're supplying to the EU, North America, or other regulated markets, you can trust UNQ to deliver with full compliance.

ISO9001

OSHA

EMS

QMS

SGS

FAQ

01. Why choose polycarbonate instead of glass for greenhouses?

Polycarbonate is 200x stronger than glass, making it impact-resistant and safer in hail or storms. It's also lighter and offers better thermal insulation, which reduces heating costs in cold seasons.

02. Does polycarbonate affect plant growth?

No. It transmits high levels of natural light while diffusing it, which helps prevent leaf burn and encourages uniform plant development. Certain finishes even optimize red/blue light wavelengths for photosynthesis.

03. What is the difference between Twinwall and Multiwall Polycarbonate Sheet?

Twinwall polycarbonate panels are like special see-through plastic boards. They've got two outside layers connected by a plastic middle part, making little tunnels inside. They're mostly clear for light, but you might not see through them perfectly.

Different from that, multiwall polycarbonate sheets are also advanced plastic sheets, with an extra layer for protection added in a special way.

These come in lots of colors and let both light and your view pass through really well.

04. What's the difference between clear, diffused, and opal polycarbonate sheets in greenhouses?

Clear: Max light transmission (over 85%), good for sun-loving crops

Diffused: Softens light, reduces shadows, ideal for seedling nurseries

Opal: Lowers heat buildup, perfect for hot regions and ornamental plants

05. Will condensation be a problem inside a polycarbonate greenhouse?

Not if you choose anti-drip / anti-fog coated sheets. These special coatings prevent water droplets from forming and dripping, protecting young plants from disease and sunburn.

06. How do polycarbonate sheets perform in snow or high-wind areas?

Multiwall polycarbonate handles high wind loads and moderate snow loads very well when installed with proper framing. Thicker sheets (8–16mm) are recommended for heavy-duty applications.

07. What thickness is best for greenhouses?

4–6mm: Suitable for mild climates and seasonal greenhouses

8–10mm: Ideal for year-round use, offers better insulation

16mm+ (triple wall): Best for extreme cold, strong wind, or snow-prone regions

08. Can I install the sheets myself?

Yes. With basic tools and proper profiles, installation is DIY-friendly. We also provide installation accessories, guides, and technical support.

09. Will the sheets yellow or degrade over time?

No. Our sheets are UV co-extruded, which means the protection is baked into the outer layer-not sprayed. They resist yellowing and maintain clarity for over 10 years.

10. How can I reduce heat buildup inside a polycarbonate greenhouse?

Choose opal or heat-reflective sheets, and ensure proper roof vents or roll-up sidewalls are installed for passive ventilation.

11. How do I clean and maintain the sheets?

Absolutely. We offer cut-to-size service, as well as custom colors like bronze, green, opal, or diffusion white based on project needs.

12. Do the sheets block UV light but still allow plant-friendly light in?

Correct. Our UV-coating blocks harmful UV rays from entering the greenhouse while maintaining over 80% light transmission for plant growth.

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Products

Multiwall Polycarbonate Sheets For Greenhouse