Polycarbonate Roofing Sheets for Greenhouses, Skylights and Canopies
HSQY PLASTIC manufactures and supplies polycarbonate roofing sheets for greenhouses, skylights, canopies, pergolas, carports, industrial rooflights, warehouses, agricultural buildings, covered walkways and architectural daylighting projects.
Our roofing range includes corrugated polycarbonate sheets, multiwall and twinwall polycarbonate panels, honeycomb or reinforced hollow panels, and solid polycarbonate roofing sheets. Each structure provides a different balance of light transmission, thermal insulation, impact resistance, appearance, weight and installation method.
The correct roofing sheet should therefore be selected according to the complete project rather than thickness alone. Roof type, span, purlin spacing, wind and snow loads, daylight requirement, insulation target, UV exposure, roof slope, sheet profile and fixing system should all be considered before ordering.
What Is a Polycarbonate Roofing Sheet?
A polycarbonate roofing sheet is a lightweight thermoplastic panel used to create transparent, translucent or tinted roofing and daylighting systems.
Polycarbonate is particularly useful in roofs where natural daylight, impact resistance and lower panel weight are important. Depending on the structure, the material can be supplied as flat solid sheet, hollow multiwall panel or corrugated/profiled roofing sheet.
These different structures are not interchangeable in every project. Corrugated sheets are especially useful for profiled roofing and industrial rooflights, multiwall sheets provide improved thermal insulation, and solid panels provide a more glass-like appearance and direct visibility.
Types of Polycarbonate Roofing Sheets
| Roofing Type | Main Advantage | Typical Applications |
| Corrugated Polycarbonate | Profile matching, high daylight and direct integration with suitable profiled roofing systems | Industrial rooflights, warehouses, agricultural roofs, greenhouses and canopies |
| Twinwall / Multiwall Polycarbonate | Internal air chambers improve thermal insulation while keeping panels lightweight | Greenhouses, skylights, conservatory-style roofs, canopies and insulated daylighting |
| Honeycomb / Reinforced Multiwall | More complex internal cells can increase stiffness and insulation | Architectural roofs, larger skylights and demanding translucent glazing projects |
| Solid Polycarbonate | Glass-like appearance, direct visibility and high impact resistance | Pergolas, canopies, roof glazing, curved covers and architectural applications |
Which Polycarbonate Roofing Sheet Should You Choose?
| Your Priority | Recommended Starting Point |
| Match an existing metal roofing profile | Corrugated / profiled polycarbonate |
| Maximum daylight in an industrial rooflight | Clear corrugated or clear solid polycarbonate |
| Greenhouse with improved insulation | Twinwall or multiwall polycarbonate |
| Glass-like pergola or canopy | Solid polycarbonate roofing panel |
| Higher thermal insulation | Thicker multiwall, triplewall or reinforced multiwall structure |
| Low-glare or shaded outdoor roof | Grey, bronze, opal or another tinted roofing grade |
| Curved transparent architectural roof | Suitable cold-curvable solid or multiwall polycarbonate, subject to minimum bending radius |
Corrugated Polycarbonate Roofing Sheets
Corrugated polycarbonate roofing sheets are single-wall PC panels formed into wave, trapezoidal or other roofing profiles.
HSQY's current corrugated product family covers approximately 0.7–3.0 mm thickness. Current products include common widths around 840 mm, 900 mm and 1050 mm, while custom width, length and corrugation profile can be evaluated.
Corrugated PC is particularly useful when transparent rooflight sheets must match an existing metal or other profiled roofing system. Corrugation pitch, rib height, crown geometry, overall width and effective cover width should be compared before ordering.
View the dedicated Corrugated Polycarbonate Sheet category for profile-matching and detailed installation information.
Multiwall Polycarbonate Roofing Sheets
Multiwall polycarbonate roofing sheets contain internal ribs and hollow air chambers that reduce heat transfer while maintaining relatively low panel weight.
HSQY's current twinwall range includes common 4, 5, 6, 8 and 10 mm products, while triplewall and more complex multiwall structures are available for projects requiring greater stiffness or thermal performance.
Multiwall sheets are particularly suitable for greenhouses, skylights and daylight roofing where thermal insulation is more important than direct glass-like visibility.
View our Multiwall Polycarbonate Sheets for twinwall, triplewall and specialized hollow structures.
Solid Polycarbonate Roofing Sheets
Solid polycarbonate roofing sheets have a continuous flat structure without hollow chambers.
Suitable clear grades provide high natural light transmission and a more glass-like appearance, making solid PC useful for pergolas, architectural canopies, entrance roofs and transparent roof glazing.
Current HSQY roofing products include 8 mm and 10 mm transparent options, while the broader solid-sheet portfolio supports additional thicknesses and customized dimensions.
View our Solid Polycarbonate Sheets for flat glazing, UV-protected, colored and fabricated PC panels.
Polycarbonate Roofing Sheet Comparison
| Feature | Corrugated | Multiwall | Solid |
| Structure | Single-wall profiled | Hollow cellular | Flat continuous panel |
| Natural Daylight | High with suitable clear grade | High but affected by internal ribs and structure | Highest direct visibility among the three structures |
| Thermal Insulation | Limited | Best of the three due to enclosed air chambers | Lower than comparable multiwall systems |
| Profile Matching | Excellent | Uses dedicated glazing profiles | Uses flat glazing systems or direct roof panel systems |
| Glass-Like Appearance | Moderate due to corrugation | Internal ribs visible | Best |
| Greenhouse Use | Good where daylight is the priority | Excellent where insulation is important | Suitable for specialized high-transparency structures |
| Industrial Rooflight Use | Excellent when matching metal roof profiles | Suitable with dedicated framing | Suitable with dedicated glazing design |
Clear, Opal, Grey, Bronze and Colored Roofing Sheets
Color influences daylight, glare, solar heat gain, privacy and roof appearance.
| Color | Main Selection Priority |
| Clear | Maximum daylight and visibility for the selected sheet structure |
| Opal / Milky White | Diffused daylight and reduced direct glare |
| Grey / Smoke | Reduced brightness and modern architectural appearance |
| Bronze / Brown | Warm tint with reduced visible brightness |
| Blue / Green | Decorative colored daylighting for canopies, pools and architectural structures |
If the project has a specific light-transmission or solar-control target, request optical data for the exact color, thickness and roofing structure rather than assuming one value applies to every panel.
UV Protection for Polycarbonate Roofing
Roofing panels receive prolonged sunlight exposure, so outdoor polycarbonate should be specified with an appropriate UV-protection system.
UV-protected grades are designed to reduce weathering, surface degradation and yellowing associated with long-term ultraviolet exposure.
If UV protection is applied on one side only, the marked protected side must face exterior sunlight. Projects exposed from both directions should specify whether two-side UV protection is required.
Light Transmission and Solar Control
High light transmission is beneficial for greenhouses, skylights and industrial rooflights, but maximum transmission is not always the best choice for every roof.
Clear roofing maximizes daylight, while grey, bronze, opal and application-specific solar-control options can reduce glare or solar heat gain.
The correct color should be selected according to building orientation, climate, indoor-use requirements and the balance between daylight and shading.
Thermal Insulation and U-Value
Thermal insulation varies significantly between roofing structures.
Corrugated and solid single-wall sheets provide limited insulation compared with hollow multiwall panels. Twinwall, triplewall and reinforced multi-chamber structures trap air between the walls and can reduce thermal transfer.
If the project has a required U-value or energy-code target, provide that value before material selection. U-value should be confirmed for the exact thickness and internal cell structure.
Polycarbonate Roofing for Greenhouses
Greenhouse roofing must balance plant-light requirements, thermal insulation, condensation, structural loading and cost.
Corrugated clear polycarbonate can provide high daylight for simple greenhouse structures, while twinwall and multiwall panels are commonly considered where improved insulation is required.
Greenhouse buyers should provide local winter temperature, wind and snow conditions, frame spacing, required light level and whether anti-condensation treatment is needed.
Polycarbonate Roofing for Skylights and Rooflights
Polycarbonate rooflights can introduce daylight into warehouses, factories, workshops, agricultural buildings and commercial structures.
Corrugated profiles are particularly useful when transparent sheets must integrate directly with existing profiled metal roofing.
Where a dedicated framing or glazing system is available, multiwall and solid polycarbonate can also be used for skylights and roof glazing.
Polycarbonate Roofing for Pergolas and Canopies
Pergolas, patios, entrance canopies and covered walkways can use clear or tinted polycarbonate to provide weather protection while retaining natural daylight.
Solid polycarbonate can provide a more glass-like appearance, while multiwall panels provide better insulation and corrugated sheets provide a practical profiled roofing option.
Polycarbonate Roofing for Carports
Carport roofing should consider sunlight, vehicle heat exposure, rain drainage, hail, wind uplift and appearance.
Clear sheets maximize daylight, while grey, bronze or other tinted grades can reduce direct brightness and create more shade.
Polycarbonate Roofing for Warehouses and Industrial Buildings
Industrial buildings frequently use polycarbonate as rooflight sections to introduce daylight between opaque roof panels.
Profile compatibility is critical when corrugated polycarbonate is installed together with profiled steel or fibre-cement roofing. Effective cover width, side lap and fixing geometry should be confirmed from the roof profile drawing.
How to Choose Polycarbonate Roofing Thickness
There is no universal "best thickness" for a polycarbonate roof because sheet structure is as important as nominal thickness.
| Roofing System | Current HSQY Selection Direction |
| Corrugated | Approximately 0.7–3.0 mm depending on profile and project |
| Twinwall | Common 4, 5, 6, 8 and 10 mm options |
| Triplewall / Advanced Multiwall | Thicker and more complex structures selected according to insulation and load requirements |
| Solid Roofing Sheet | Current roofing products include 8 mm and 10 mm options, with additional gauges available within the wider solid-sheet range |
Final thickness should be determined from span, support spacing, profile geometry, wind load, snow load, impact requirements and local construction standards.
Roof Pitch and Water Drainage
Polycarbonate roofs require sufficient slope so rainwater drains away rather than collecting on the panels or joints.
Minimum roof pitch depends on the roofing structure, sheet profile, panel length, overlap arrangement, framing system and local rainfall conditions.
Use the approved installation drawing for the exact roofing product rather than applying one universal roof angle to all corrugated, multiwall and solid PC systems.
Wind Load, Snow Load and Support Spacing
Structural performance depends on much more than the impact strength of polycarbonate resin.
Panel thickness, wall structure, corrugation profile, sheet length, support spacing, fixing layout, edge conditions and roof geometry all influence performance under wind and snow loads.
For commercial roofing projects, provide design wind pressure, snow load, purlin or rafter spacing and panel span so the material can be evaluated against the actual structure.
Thermal Expansion of Polycarbonate Roofing
Polycarbonate expands and contracts when temperature changes, so roofing panels should not be installed as if they were dimensionally fixed glass or metal.
Fixing holes, glazing channels, panel ends and side clearances should allow appropriate movement.
Fasteners should secure the roofing system without excessively restricting thermal expansion.
Roofing Fasteners, Washers and Profiles
The correct accessory system depends on whether the roof uses corrugated, multiwall or solid panels.
| Roofing Type | Typical Accessory Considerations |
| Corrugated | Profile-specific fasteners, washers, flashing, side laps and end laps |
| Multiwall | H-profiles, U-profiles, glazing bars, sealing tape, ventilating tape, washers and end profiles |
| Solid | Glazing bars, direct fixing systems, suitable washers, edge channels and expansion clearance |
Sealants, tapes and gaskets that directly contact polycarbonate should be confirmed as chemically compatible with the selected panel.
How to Install Corrugated Polycarbonate Roofing
Corrugated sheets should be installed according to the exact profile and roofing-system design.
Install the UV-protected surface toward sunlight where protection is one-sided.
Run the corrugations in the direction of roof drainage.
Confirm required side and end overlaps.
Use effective cover width rather than overall width for quantity calculation.
Allow for thermal expansion around fixing points.
Do not overtighten screws.
Use compatible washers and sealing materials.
Follow the required roof slope and support spacing.
How to Install Multiwall Polycarbonate Roofing
Install internal channels in the direction of slope or vertical drainage.
Install the UV-protected side toward exterior sunlight.
Allow sufficient expansion clearance in glazing profiles.
Seal upper panel ends and provide suitable ventilation or drainage protection at lower ends according to the system.
Prevent dust, insects and water from entering open channels.
Use profile systems compatible with the selected panel thickness.
Confirm minimum bending radius before using panels in curved roofs.
Can Polycarbonate Roofing Be Curved?
Suitable polycarbonate sheets can be cold curved for arched canopies, covered walkways, greenhouse roofs and other curved structures.
Minimum bending radius depends on thickness, panel structure and product grade. Multiwall channels should normally run in the direction of the curve rather than across it.
Provide the required roof radius and panel type when requesting material for a curved structure.
Can You Walk on Polycarbonate Roofing?
Do not walk directly on unsupported polycarbonate roofing panels.
Roof installation and maintenance should use appropriate crawling boards, ladders, walkways and fall-protection systems supported by the building structure.
High impact resistance does not mean that a roofing sheet should be treated as a structural walking surface.
Fire Performance and Building Requirements
Fire performance varies according to polycarbonate formulation, thickness, panel structure and test method.
Do not apply a fire classification listed for one solid, corrugated or multiwall product to every HSQY roofing sheet.
If your project requires UL 94, EN 13501, local building-code approval or another classification, provide the exact test standard and required performance level so documentation can be confirmed for the selected material.
Polycarbonate Roofing vs. Glass
| Feature | Polycarbonate | Glass |
| Impact Resistance | High | More brittle unless specialized safety glass is used |
| Weight | Lower | Higher |
| Thermal Expansion | Greater movement must be allowed during installation | Lower dimensional movement |
| Surface Scratch Resistance | Standard PC is easier to scratch | Generally harder surface |
| Installation | Lightweight and can be cut with suitable tools | Heavier and often requires more specialized handling |
Polycarbonate Roofing vs. Metal Roofing
Polycarbonate and metal roofing are often used together in commercial and industrial buildings.
Metal panels provide opaque roof coverage, while transparent or translucent corrugated polycarbonate sections can introduce natural daylight.
When combining the two materials, profile compatibility, different thermal expansion rates, flashing, overlaps and fixing details should all be considered.
Cleaning and Maintaining Polycarbonate Roofs
Use clean lukewarm water, mild soap or a compatible neutral cleaning solution with a soft cloth or sponge.
Avoid abrasive brushes, sharp tools and aggressive solvents that have not been confirmed as compatible with the selected polycarbonate resin, surface coating or UV-protected layer.
Roof owners should also periodically inspect fasteners, washers, profiles, sealing materials, flashing and drainage paths.
How to Choose the Right Polycarbonate Roofing Sheet
1. Define the Roof Application
Specify greenhouse, skylight, industrial rooflight, pergola, canopy, carport, warehouse or another roofing application.
2. Choose Corrugated, Multiwall or Solid
Choose according to profile compatibility, insulation requirement, appearance, daylight and structural system.
3. Confirm Sheet Thickness
Thickness must be considered together with panel structure, roof span, support spacing and load requirements.
4. Select Clear, Opal or Tinted
Define whether maximum daylight, diffusion, shade or solar control is the priority.
5. Confirm UV Exposure
Specify one-side or two-side exposure where relevant and confirm installation orientation.
6. Provide Roof Pitch
Roof slope affects drainage, overlap design and installation details.
7. Provide Purlin or Rafter Spacing
Support spacing is essential when evaluating panel deflection and structural suitability.
8. Provide Wind and Snow Loads
Commercial and structural projects should provide the design loads applicable to the building location.
9. Define Thermal Insulation
If insulation is important, provide the target U-value or compare suitable multiwall structures.
10. Confirm Roofing Profile
For corrugated sheets, send the existing profile drawing or sample before ordering.
11. Confirm Accessories and Fixings
Define glazing bars, joining profiles, screws, washers, sealing tape, flashing and other components.
12. Review Samples and Drawings
For large roofing projects, approve product samples, profile drawings, color and installation details before mass production.
Custom Polycarbonate Roofing Sheets
HSQY supports customized roofing projects for greenhouse builders, construction contractors, building-material distributors, industrial roofing companies and architectural glazing companies.
Custom options can include:
Corrugated, multiwall or solid roofing structures
Custom thickness
Custom sheet width
Custom sheet length
Custom corrugated profiles
Profile matching to existing metal roofing
Clear, opal, grey, bronze, blue, green and custom colors
UV-protected grades
One-side or project-specific two-side UV protection
Anti-condensation options for suitable greenhouse projects
Solar-control options subject to project confirmation
Cut-to-length panels
Custom export packing
OEM and private-label supply
Polycarbonate Roofing Quality Control
Quality-control parameters should be matched to the selected roofing structure.
Sheet thickness and tolerance
Sheet width and length
Corrugation geometry where applicable
Overall and effective cover width
Multiwall cell structure and rib geometry
Panel weight where specified
Color consistency
Light transmission where specified
Thermal data where specified
UV-protected surface
Surface defects
Impact requirements where specified
Fire classification where specified
Protective-film condition
Accessory compatibility
Packaging and pallet condition
Packing and International Shipping
Polycarbonate roofing sheets are lightweight but often large, so panel length, pallet size, container utilization and unloading conditions can significantly influence shipping cost.
Protective film and suitable export wrapping help protect panel surfaces during transport and handling.
Custom-length panels can reduce cutting and roof joints, but their dimensions should also be checked against container loading, local transport and lifting equipment.
Why Choose HSQY for Polycarbonate Roofing Sheets?
Multiple Roofing Systems: HSQY supplies corrugated, twinwall, multiwall, honeycomb and solid polycarbonate roofing solutions.
Application-Based Selection: Buyers can select material according to greenhouse insulation, industrial rooflight profile matching, architectural appearance or structural requirements.
Custom Roofing Profiles: Corrugated profile matching can be discussed using an existing roof-sheet sample or cross-section drawing.
Multiple Colors: Clear, opal, grey, bronze, blue, green and other project-specific colors can be evaluated.
UV-Protected Outdoor Grades: Roofing materials can be selected according to expected sunlight exposure and required UV configuration.
Custom Dimensions: Sheet width, length, thickness and cut-to-size requirements can be discussed according to the selected roofing structure.
Broader PC Portfolio: HSQY also supplies dedicated Corrugated Polycarbonate Sheets, Multiwall Polycarbonate Sheets and Solid Polycarbonate Sheets.
Sample Evaluation: Available samples can be discussed for checking structure, profile, thickness, color and optical appearance before bulk ordering.
Information Needed for a Polycarbonate Roofing Quote
| Application | Greenhouse, skylight, rooflight, canopy, pergola, carport, warehouse or other roof |
| Sheet Type | Corrugated, twinwall, multiwall, honeycomb, solid or recommendation required |
| Thickness | Required or existing thickness |
| Sheet Dimensions | Width × length or roof dimensions |
| Corrugated Profile | Existing sample, profile code or cross-section drawing where applicable |
| Color | Clear, opal, grey, bronze, blue, green or custom |
| Daylight Requirement | Maximum daylight, diffused daylight or shading requirement |
| Thermal Requirement | Required U-value or insulation target where applicable |
| UV Exposure | One-side or two-side exposure where applicable |
| Roof Pitch | Roof angle or slope |
| Support Spacing | Purlin or rafter center-to-center spacing |
| Structural Loads | Wind pressure, snow load and other design loads where relevant |
| Accessories | Joining profiles, glazing bars, screws, washers, flashing or sealing requirements |
| Standards | Required fire, building or project-specific testing where applicable |
| Quantity | Required sheets, square meters or estimated annual demand |
| Destination | Destination country and port |
Polycarbonate Roofing Sheet FAQ
What is the best polycarbonate sheet for roofing?
The best type depends on the project. Corrugated polycarbonate is suitable for profiled roofs and industrial rooflights, multiwall polycarbonate is preferred when thermal insulation matters, and solid polycarbonate provides a more glass-like appearance.
What types of polycarbonate roofing does HSQY supply?
HSQY supplies corrugated, twinwall, multiwall, honeycomb and solid polycarbonate roofing panels.
Is corrugated or multiwall polycarbonate better for roofing?
Corrugated sheet is particularly useful for profile matching and lightweight rooflights. Multiwall sheet provides greater thermal insulation because of its hollow internal chambers.
Is solid or multiwall polycarbonate better for a pergola?
Solid polycarbonate provides a more glass-like appearance, while multiwall panels offer better insulation and lower weight for a given nominal thickness. Selection depends on appearance, thermal requirements and framing.
What thickness polycarbonate should I use for a roof?
There is no universal thickness. Corrugated, multiwall and solid panels have different structural behavior. Provide roof span, support spacing, wind and snow loads so the correct panel can be evaluated.
Is 6mm polycarbonate suitable for roofing?
A 6mm twinwall panel can be considered for many greenhouse and canopy applications, but suitability depends on structure, frame spacing and local loads.
Is 8mm or 10mm polycarbonate better?
Thicker panels generally provide greater rigidity, while multiwall thickness can also improve insulation. The better choice depends on panel type, span, climate and support system.
Is polycarbonate roofing good for greenhouses?
Yes. Clear corrugated panels can provide high daylight, while twinwall and multiwall structures can provide improved thermal insulation for greenhouse applications.
Is clear polycarbonate roofing transparent?
Clear solid polycarbonate provides the best direct visibility. Clear corrugated panels provide high light transmission but the profiled shape affects visual clarity. Multiwall sheets transmit daylight but the internal ribs remain visible.
Does polycarbonate roofing block UV?
Outdoor roofing grades can include UV-protected surfaces. The exact UV performance and whether protection is on one or both sides should be confirmed for the selected product.
Which side of polycarbonate roofing faces the sun?
If UV protection is applied on only one side, the marked UV-protected face must be installed toward sunlight.
Does polycarbonate roofing get hot?
Solar heat gain depends on color, transmission, roof orientation, ventilation and sheet structure. Tinted, opal or solar-control options can be considered when reducing direct heat and glare is important.
Does multiwall polycarbonate insulate better than corrugated sheet?
Yes. Multiwall panels contain enclosed air chambers that generally provide better thermal insulation than single-wall corrugated roofing.
Can polycarbonate roofing withstand hail?
Polycarbonate has high impact resistance, but finished-roof hail performance also depends on thickness, profile, support spacing, panel age and impact conditions. Confirm project-specific requirements where hail rating is critical.
Can polycarbonate roofing withstand snow?
Polycarbonate roofs can be designed for snow conditions, but panel thickness, structure, span, purlin spacing and roof slope must be selected according to the actual snow load.
What roof pitch is required for polycarbonate?
Minimum slope is product- and system-specific. Follow the approved installation drawing for the selected corrugated, multiwall or solid roofing system.
Does polycarbonate roofing expand in heat?
Yes. Polycarbonate expands and contracts with temperature changes, so installation systems must provide suitable clearance around panel edges and fixing points.
Can screws be tightened firmly into polycarbonate roofing?
Fasteners should not be overtightened because excessive clamping can restrict thermal expansion and create stress around fixing points.
Can polycarbonate roofing be curved?
Suitable solid and multiwall grades can be cold curved within their approved minimum bending radius. Provide panel thickness and required roof radius for evaluation.
Can you walk on polycarbonate roofing?
Do not walk directly on unsupported polycarbonate roofing panels. Use suitable crawling boards, walkways and fall-protection systems supported by the roof structure.
Can corrugated polycarbonate match metal roof panels?
Yes. HSQY can evaluate existing corrugated profiles or custom profile development using a roof-sheet sample or cross-section drawing.
Can HSQY customize roofing sheet colors?
Clear, opal, grey, bronze, blue, green and other custom colors can be evaluated according to the product structure and purchasing quantity.
Can HSQY customize roofing sheet lengths?
Custom lengths can be discussed according to sheet type, extrusion or forming capability, transportation limits and order quantity.
Is polycarbonate roofing fire retardant?
Fire performance is grade- and thickness-specific. If a project requires a specific fire classification, confirm the standard and target rating for the exact roofing product.
Can I request roofing sheet samples?
Available samples can be discussed for evaluating thickness, structure, profile, color, transparency and compatibility before bulk ordering.
What information should I provide for a roofing quotation?
Provide application, roofing type, thickness, dimensions, color, profile drawing where relevant, roof slope, support spacing, wind and snow loads, UV requirement, quantity and destination.
Request a Polycarbonate Roofing Sheet Quote
Looking for a reliable polycarbonate roofing sheet manufacturer for a greenhouse, skylight, canopy, industrial rooflight or architectural roofing project?
Send HSQY your roof dimensions, required sheet type, thickness, color, support spacing and estimated quantity. For structural projects, include wind load, snow load and roof slope. For corrugated rooflights, send the existing roof profile drawing or sheet sample so profile compatibility can be evaluated.
