4x8 ft Twinwall Polycarbonate Greenhouse Sheet

4x8 ft Double Wall Polycarbonate Greenhouse Sheet

HSQY double wall polycarbonate sheet, also known as twinwall polycarbonate sheet, is a lightweight, impact-resistant glazing material designed for greenhouses, roofing, skylights, canopies and architectural daylighting applications. Its hollow double-wall structure combines light transmission with thermal insulation and mechanical strength.

Manufactured from 100% virgin polycarbonate (PC) resin, HSQY twinwall sheets feature two outer layers connected by internal ribs. The hollow channels help reduce material weight and provide an insulating air space between the two surfaces.

HSQY supplies twinwall polycarbonate panels in the common 4x8 ft (1220 x 2440mm) size, with available thicknesses of 4mm, 5mm, 6mm, 8mm and 10mm. Customized sizes are available, with a listed maximum sheet width of 2100mm.

Available colors include clear, green, lake blue, blue, emerald, brown, grass green, opal, grey and customized colors. Light transmission can reach up to 80% for suitable specifications, depending on panel color, thickness and material grade.

For outdoor applications, HSQY can supply twinwall polycarbonate sheets with a co-extruded UV-protective layer. This treatment helps improve resistance to sunlight-related aging and yellowing. The applicable UV protection, coating side and performance requirements should be confirmed for the selected product.

Our twinwall PC sheets are suitable for greenhouse manufacturers, agricultural contractors, roofing companies, construction material distributors, architectural glazing contractors and industrial buyers requiring lightweight translucent panels.

Material: 100% Virgin Polycarbonate | Standard Size: 4x8 ft (1220 x 2440mm) | Thickness: 4, 5, 6, 8, 10mm | Maximum Width: 2100mm | Light Transmission: Up to 80% | UV Protection: Available

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Twinwall Polycarbonate Sheet Product Video

Double Wall Polycarbonate Sheet Product Images

The twinwall structure consists of two polycarbonate surfaces separated by internal ribs. It provides a lightweight hollow panel suitable for greenhouse glazing, roofing and daylighting applications.

Twinwall Polycarbonate Sheet Specifications

HSQY provides double wall polycarbonate sheets in different thicknesses, sizes and colors for greenhouse and construction applications. The following table summarizes the available product specifications and commercial terms.

Actual light transmission, thermal insulation, impact resistance and structural performance depend on the selected panel thickness, color, hollow structure and material grade. Buyers requiring specific engineering properties should confirm the applicable technical data before ordering.

Available Twinwall Polycarbonate Sheet Thicknesses

HSQY supplies double wall polycarbonate sheets in 4mm, 5mm, 6mm, 8mm and 10mm thicknesses. The appropriate thickness depends on the panel dimensions, installation method, local climate and structural requirements.

4mm Twinwall Polycarbonate Sheet

The 4mm twinwall polycarbonate sheet is a lightweight option for selected greenhouse glazing and small panel applications. It may be considered where panel spans and loading requirements are relatively limited.

The suitability of a 4mm panel should be confirmed against the support spacing, wind load, snow load and installation design.

5mm Twinwall Polycarbonate Sheet

The 5mm twinwall sheet provides another thickness option for greenhouse and lightweight glazing projects. It can be considered for applications requiring a balance between panel weight, light transmission and material thickness.

6mm Twinwall Polycarbonate Sheet

The 6mm double wall polycarbonate sheet can be evaluated for greenhouse roofing, translucent panels and selected architectural glazing applications where greater panel thickness is required.

Support spacing and fastening requirements should be established according to the project design and the panel's actual load-bearing characteristics.

8mm Twinwall Polycarbonate Sheet

The 8mm twinwall panel provides a thicker hollow sheet option for greenhouse glazing, roof panels and daylighting structures. Buyers can evaluate its thermal and mechanical performance according to the intended installation.

10mm Twinwall Polycarbonate Sheet

The 10mm twinwall polycarbonate sheet can be considered for projects requiring a thicker insulating glazing panel. It is suitable for evaluation in greenhouse, roofing and daylighting applications where thermal performance and structural requirements are important.

Greater thickness does not automatically establish a particular allowable span or load rating. Final panel selection should be based on the relevant technical data and installation requirements.

Key Features of Double Wall Polycarbonate Sheets

Light Transmission for Greenhouse Glazing

Twinwall polycarbonate sheets allow natural light to enter greenhouse structures while providing protection from direct weather exposure. The listed light transmission reaches up to 80% for suitable panel configurations.

Light transmission varies with panel thickness, color, surface treatment and hollow structure. Greenhouse builders should select the panel according to the light requirements of the crops and growing environment.

Thermal Insulation from the Double Wall Structure

The internal air spaces of twinwall polycarbonate sheets contribute to thermal insulation. Compared with suitable single-layer glazing systems, the hollow structure can help reduce heat transfer and support greenhouse temperature management.

Actual insulation performance depends on the panel thickness, internal channel design and installation. Buyers requiring a defined thermal performance should request the applicable U-value or thermal transmittance data.

High Impact Resistance

Polycarbonate is known for its toughness and impact resistance. Twinwall panels can provide useful resistance to normal handling stresses and selected outdoor impacts, making them suitable for greenhouse and roofing applications.

Resistance to hail, windborne debris and other impacts depends on panel thickness, installation method and test conditions. Buyers should confirm the required impact classification for demanding projects.

UV-Protected Options for Outdoor Use

HSQY offers polycarbonate sheets with co-extruded UV protection for suitable outdoor applications. The protective surface is intended to help reduce sunlight-related discoloration and deterioration over time.

The protective layer may be applied to a designated side of the panel. During installation, the UV-protected side should face the direction specified by the manufacturer. Buyers should confirm whether the selected product has single-sided or double-sided UV protection.

Lightweight Compared with Glass

Twinwall polycarbonate sheets provide a lightweight alternative to glass in suitable glazing applications. The hollow structure reduces material weight while maintaining useful panel stiffness and impact resistance.

Lower panel weight may simplify transportation and installation, although the framing and fastening system must still be designed for the required loads.

Multiple Colors and Customized Dimensions

HSQY supplies clear, green, lake blue, blue, emerald, brown, grass green, opal, grey and customized twinwall polycarbonate sheets. Standard 4x8 ft panels and wider custom specifications are available for different projects.

The available size and color combinations should be confirmed for each panel thickness and structural configuration.

Twinwall Polycarbonate Sheet Colors for Greenhouses

Panel color affects the appearance of a greenhouse and the quantity and distribution of transmitted light. Buyers should select a color according to the growing environment, daylighting requirements and project design.

Clear Twinwall Polycarbonate Sheet

Clear twinwall polycarbonate is commonly selected when natural light transmission and visibility are priorities. It can be used for greenhouse glazing, skylights and other translucent panels.

Opal Twinwall Polycarbonate Sheet

Opal polycarbonate panels provide a translucent appearance with more diffused light than many clear panel options. They can be considered for selected greenhouse and architectural daylighting applications where glare reduction or visual privacy is preferred.

Green Twinwall Polycarbonate Sheet

Green twinwall panels are available for projects requiring a particular color appearance. Options include green, grass green and emerald shades.

For crop-growing applications, the light transmission and spectral properties of the selected color should be considered before material selection.

Brown, Grey and Blue Polycarbonate Panels

Brown, grey, lake blue and blue panel options provide alternative appearances for canopies, roof glazing, walkways and other architectural applications. The required daylight transmission and shading characteristics should be confirmed for the selected product.

Applications of Double Wall Polycarbonate Sheets

Greenhouse Roofing and Glazing

Twinwall polycarbonate sheets are widely used for greenhouse roofs, sidewalls and other glazing surfaces. Their hollow construction combines light transmission with insulating properties and impact resistance.

Greenhouse builders should select the thickness, color and UV-protected grade according to local weather conditions, crop light requirements and structural design.

Roofing and Skylights

Double wall polycarbonate panels can be used in suitable roofing and skylight systems for commercial buildings, industrial facilities and other daylighting projects. Their lightweight construction is useful where natural light and reduced glazing weight are desired.

Roofing applications require evaluation of wind pressure, snow loading, support spacing, panel deflection and the relevant building regulations.

Canopies and Covered Walkways

Twinwall polycarbonate sheets can be considered for entrance canopies, carports, outdoor corridors and covered walkways. They provide a translucent roof surface while reducing the weight associated with some conventional glazing materials.

Noise Barriers and Protective Panels

Twinwall polycarbonate panels can be evaluated for suitable noise barrier and protective panel systems. These applications require confirmation of acoustic performance, impact strength, structural design and relevant installation standards.

Signage and Display Structures

Lightweight translucent polycarbonate panels can be used in selected signage and display structures. Sheet color, thickness and fastening arrangements should be selected according to the intended installation.

Storm Protection Applications

Polycarbonate panels offer impact-resistant material options for selected protective applications. However, suitability for storm protection depends on the tested panel assembly, mounting system and local building code requirements.

Standard greenhouse twinwall panels should not be assumed to qualify as hurricane-rated shutters, impact glazing or storm protection systems without the required testing and approvals.

Greenhouse and Roofing Application Images

Twinwall polycarbonate sheets are used in greenhouse and roofing structures requiring translucent, lightweight glazing. The following images illustrate typical project applications.

Twinwall Polycarbonate Sheet Installation Guidelines

Proper installation helps maintain the appearance, drainage and long-term performance of twinwall polycarbonate sheets. Installation requirements depend on the selected sheet thickness, structure and framing system.

Install the UV-Protected Side Correctly

For sheets supplied with single-sided UV protection, the designated UV-protected surface should face outward toward sunlight. Follow the markings on the protective film and the manufacturer's installation instructions.

Allow for Thermal Expansion

Polycarbonate expands and contracts with temperature changes. Installation profiles, fixing points and panel clearances should allow for the expected thermal movement of the sheet.

Panels should not be fixed in a way that prevents normal thermal expansion. The required clearance and fastening method should follow the relevant technical installation instructions.

Orient Hollow Channels for Drainage

For sloped glazing applications, hollow channels are generally positioned in the direction of the roof slope to support condensation drainage. The required panel orientation depends on the installation system and panel design.

Protect Open Sheet Ends

Open channel ends should be treated according to the installation system to reduce the entry of dust, insects and water. Suitable sealing tapes, ventilated tapes and end profiles may be required depending on panel orientation and drainage requirements.

Use Compatible Profiles and Fasteners

Twinwall panels should be installed using compatible glazing profiles, gaskets and fastening systems. The installation design must provide adequate support and allow for thermal movement without damaging the sheet.

Confirm Support Spacing and Structural Loads

The allowable distance between supports depends on sheet thickness, hollow structure, panel dimensions and design loads. Greenhouse and roofing contractors should verify wind and snow loads, deflection limits and applicable building requirements before installation.

Cleaning and Maintenance

Polycarbonate sheets should be cleaned using methods and products suitable for the selected material grade and surface treatment. Avoid abrasive tools and incompatible solvents that may scratch or damage the panel.

For outdoor glazing, inspect the sealing profiles, channel ends and fastening points as part of regular maintenance.

How to Select Twinwall Polycarbonate Sheets

Selecting the right twinwall polycarbonate sheet requires consideration of panel thickness, dimensions, color, UV protection, light transmission and installation conditions.

• Panel Thickness: Select 4mm, 5mm, 6mm, 8mm or 10mm according to the project requirements.

• Sheet Dimensions: Specify 4x8 ft panels or customized widths and lengths.

• Color: Choose clear, green, opal, grey, blue, brown or other available colors.

• Light Transmission: Confirm the required light transmission for the selected color and thickness.

• Thermal Performance: Specify the required U-value or thermal insulation performance if applicable.

• UV Protection: Confirm whether single-sided or double-sided UV protection is required.

• Panel Weight: Request the sheet weight per square meter for structural and shipping calculations.

• Support Spacing: Provide the intended distance between structural supports.

• Environmental Conditions: Specify wind loads, snow loads, sunlight exposure and other local weather conditions.

• Installation Method: Confirm the framing system, panel orientation and fixing requirements.

• Order Quantity: Provide the required number of sheets or total project area.

• Delivery Destination: Specify the country, port or project location for shipping arrangements.

For greenhouse or construction projects, buyers can provide drawings, panel schedules and performance requirements. HSQY can discuss suitable sheet specifications and customized dimensions according to the project needs.

Discuss Your Greenhouse Sheet Requirements

Twinwall Polycarbonate Sheet Packing and Delivery

HSQY supplies twinwall polycarbonate sheets with protective packaging arrangements for storage and export transportation. The packing method depends on the sheet dimensions, thickness, quantity and shipping requirements.

• Sample Packaging: Small sheets packed in protective boxes for material evaluation.

• Bulk Sheet Packaging: Sheets wrapped in PE film or kraft paper to help protect the surface.

• Pallet Packaging: Approximately 500–2,000kg per plywood pallet, depending on the sheet dimensions and packing arrangement.

• Container Loading: Approximately 20 tons per container under suitable loading conditions; actual loading depends on panel dimensions and packing method.

• Payment Terms: T/T, L/C, Western Union and PayPal.

• Delivery Terms: EXW, FOB, CNF and DDU.

• Estimated Lead Time: Generally 10–14 working days, depending on order quantity and customization requirements.

For export orders, buyers should confirm the required panel dimensions, thickness, color and total quantity. Final packing and shipping arrangements can be established according to the order and destination.

Quality Certifications and Documentation

HSQY provides quality-related documentation for international buyers of polycarbonate sheets and other plastic materials. SGS and ISO 9001:2008 are listed in the existing product information. Customers should confirm the current validity and applicable scope of any required certificates.

For construction projects, buyers may also require specific reports covering light transmission, UV protection, thermal performance, fire behavior, impact resistance and mechanical loading. The applicable documents should be confirmed for the selected panel grade and thickness.

Frequently Asked Questions About Twinwall Polycarbonate Sheets

What is a double wall polycarbonate sheet?

A double wall polycarbonate sheet is a hollow PC panel made with two outer surfaces connected by internal ribs. This structure creates air channels that contribute to thermal insulation while maintaining light transmission and impact resistance.

Is twinwall polycarbonate suitable for greenhouses?

Yes. Twinwall polycarbonate is widely used for greenhouse roofs and sidewalls because it combines natural light transmission, thermal insulation and impact resistance. The appropriate panel thickness and color should be selected according to the greenhouse design and growing conditions.

What is the standard size of HSQY twinwall polycarbonate sheet?

The listed common size is 4x8 ft, equivalent to approximately 1220 x 2440mm. Customized sheet dimensions are available, with a listed maximum width of 2100mm.

What thicknesses are available?

HSQY supplies twinwall polycarbonate sheets in 4mm, 5mm, 6mm, 8mm and 10mm thicknesses. Customized specifications can also be discussed according to the project requirements.

How much light passes through twinwall polycarbonate?

The listed light transmission reaches up to 80% for suitable panel configurations. Actual transmission varies according to color, thickness, surface treatment and panel structure. Buyers requiring a defined light transmission should request the relevant product data.

Is twinwall polycarbonate better insulated than glass?

The hollow double-wall structure can provide improved insulation compared with suitable single-layer glazing systems. However, thermal performance varies between glazing products. Buyers should compare the applicable U-values rather than assuming that twinwall polycarbonate outperforms every glass system.

Are HSQY twinwall polycarbonate sheets UV protected?

HSQY offers twinwall polycarbonate sheets with a co-extruded UV-protective layer for suitable outdoor applications. Buyers should confirm the UV protection specification and whether it is applied to one side or both sides of the selected panel.

Which side of twinwall polycarbonate should face the sun?

For panels with single-sided UV protection, the marked UV-protected side should face outward toward sunlight. Installers should follow the product identification markings and the manufacturer's installation guidance.

What is the difference between clear and opal twinwall polycarbonate?

Clear panels generally prioritize transparency and light transmission. Opal panels provide a more diffused appearance and can help reduce direct glare. The actual optical performance depends on the specific material grade and thickness.

Can twinwall polycarbonate sheets be cut to size?

Yes. Twinwall polycarbonate sheets can be cut using suitable equipment and cutting methods. Buyers should provide the required dimensions, panel thickness and cutting tolerances when requesting customized sizes.

How should twinwall polycarbonate sheets be installed?

Installation should follow the applicable panel and glazing system instructions. Important considerations include UV-side orientation, thermal expansion, channel drainage, end sealing, support spacing and the use of compatible fastening components.

How do I prevent condensation inside twinwall panels?

Suitable channel orientation, end tapes, drainage arrangements and installation profiles can help manage condensation. The appropriate method depends on the panel installation system and environmental conditions.

Are twinwall polycarbonate sheets resistant to hail?

Polycarbonate provides good impact resistance, and suitable twinwall panels can withstand certain impact conditions. Hail resistance depends on the tested panel thickness, structure and installation. Buyers requiring a specific impact performance should confirm the relevant test data.

Can twinwall polycarbonate be used for roof skylights?

Yes. Suitable twinwall polycarbonate panels can be used for roofing and skylight systems. The installation must meet the required structural loads, weatherproofing conditions and applicable building regulations.

What colors can HSQY supply?

Available colors include clear, green, lake blue, blue, emerald, brown, grass green, opal, grey and customized colors. Buyers should confirm the color availability and light transmission for the selected thickness.

Can I request samples before placing a bulk order?

Samples can be discussed for material evaluation. Please provide the required thickness, color, size and intended application when requesting a sample. Freight arrangements can be confirmed according to the destination.

What is the production lead time?

The listed estimated lead time is generally 10–14 working days, depending on order quantity, panel dimensions, color and customization requirements. International transit time depends on the selected shipping method and destination.

What information is required for a quotation?

Please provide the required thickness, sheet width, length, color, UV protection specification, order quantity, application and delivery destination. For greenhouse or roofing projects, include relevant drawings or load requirements where available.

About HSQY Plastic Group

Changzhou Huisu Qinye Plastic Group Co., Ltd. supplies polycarbonate sheets, PVC films, PET products, PP packaging materials and other industrial plastics to international manufacturers and distributors.

HSQY works with greenhouse suppliers, construction material distributors, industrial fabricators and glazing contractors to discuss polycarbonate sheet specifications, customized dimensions, colors and export requirements.

Request a Quote for 4x8 Twinwall Polycarbonate Sheets

Looking for double wall polycarbonate sheets for greenhouses, roofing, skylights or canopies? HSQY supplies 4x8 ft twinwall polycarbonate panels in 4mm, 5mm, 6mm, 8mm and 10mm thicknesses, with multiple colors and customized sizes.

Send us your required sheet thickness, dimensions, color, UV protection requirements, total quantity and destination port. Our team can discuss suitable twinwall polycarbonate specifications, sample arrangements and wholesale supply options for your project.

Contact HSQY for Twinwall Polycarbonate Sheets