SUNPAL® MULTIWALL POLYCARBONATE PANEL SYSTEM

A Polycarbonate Standing Seam Architectural System for any engineering and design challenge

SUNPAL® designer panel system is designed to suit a variety of flat or curved polycarbonate roofing and cladding designs. With this leak-free roofing system, architects can incorporate natural light, thermal insulation, and structural strength into daylighting systems.

The SUNPAL® polycarbonate standing seam architectural system is lightweight, leak-proof, can endure very high winds loads, and can accommodate thermal expansion and contraction. For your project, our experienced team can assist with practical design and installation methods.

Benefits

SUNPAL multiwall polycarbonate building panels provide natural light and thermal insulation with heavy-duty performance.

Premium Solution

UV Protection

Leak Proof

Gaskets & Sealants Free

Minimal Maintenance

High Structural Strength

SUNPAL FACADE – Victoria College

Applications

For residential, commercial, and engineering challenges: SUNPAL architectural panel solutions.
  • Polycarbonate Pergola Sheets

  • Curved Façade and Roof Design

  • Lightbox Applications

  • Sports Facility Roofing

  • Acoustic & Privacy Screens

  • Façade Applications

  • Swimming Pool Covers

  • Polycarbonate Walling

  • Architectural Façades

Videos

SUNPAL Multiwall polycarbonate roof panel guidance and testimonials. Embrace design freedom with the help of our team.
  • Corporate HQ renovated with SUNPAL 18mm curtain walling

    Watch video>
  • City Deep Truck Stop Palram South Africa

    Watch video>
  • The principles of Polycarbonate Architectural Systems

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  • SUNPAL® 18mm façade at Foxwell State College

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Product Details

  • Dimensions
  • Colours & Finishes
  • Physical Properties
  • Technical Data
Dimensions

Panel Types

TypeWidthHeightHeight with Polycarbonate JoinerWeightMin. cold bending radius
SUNPAL® 10/600600mm25.5mm33mm1.56 Kg/m, 2.60 Kg/m²2.4mSUNPAL 10_600
SUNPAL® 18/10001000mm33.5mm41mm3.11 Kg/m, 3.11 Kg/m²3.0mSUNPAL 18_1000
SUNPAL® 20/10001000mm35.5mm43mm3.19 Kg/m, 3.19 Kg/m²3.0mSUNPAL 20_1000

SUNPAL® polycarbonate system panels come in a variety of sizes and thicknesses. Multicell polycarbonate sheets with a thicker cell structure offer better thermal insulation, while tints determine the shading coefficient and solar heat gains.  Check with your local office for stock availability.

Colours & Finishes

SUNPAL® 10/600 coloUrs

Color%LTSolar Heat Gain (SHGC) ASTM E-424-71Shading Coefficient ASTM E-424-71
Clear650.630.72
Bronze250.40.46
Grey300.450.52
White Opal250.370.43
White Ice500.560.64
Green500.560.64
Blue500.60.69
Red200.520.6
White / Bronze100.280.34
White / Grey100.280.34
White / Blue100.370.43
White / Red40.280.32
Solar Ice200.280.32
Solar Control200.30.34
Bluish Breeze340.320.38
Clear640.630.72
Bronze200.420.44
White Opal260.40.45
Green400.480.54
Blue400.510.59
Red200.470.55
Solar Ice200.350.41
Grey300.420.49

SUNPAL® 18/1000 & 20/1000 coloUrs

Color%LTSolar Heat Gain (SHGC) ASTM E-424-71Shading Coefficient ASTM E-424-71
Clear500.540.62
Bronze200.350.39
Grey240.440.51
White Opal200.30.34
White Ice400.480.55
Green380.460.53
Blue360.50.56
Red200.440.5
White / Bronze100.280.34
White / Grey100.280.34
White / Blue100.370.43
White / Red40.280.32
Solar Ice150.230.26
Solar Control150.250.28
Bluish Breeze340.330.38
Clear490.540.61
Bronze200.370.43
White Opal200.330.38
Green250.380.44
Blue250.410.48
Red150.390.45
Solar Ice150.30.35
Grey300.410.48

SUNPAL® polycarbonate system panels come in a variety of sizes and thicknesses. Multicell polycarbonate sheets with a thicker cell structure offer better thermal insulation, while tints determine the shading coefficient and solar heat gains.  Check with your local office for stock availability.

Physical Properties

Typical Physical Properties

PropertyMethod*ConditionsUnitsValue
DensityD-792g/cm³1.2
Heat deflection temperature (HDT)D-648Load: 1.82 MP°C130
Service Temperature - Short term°C-50 to +120
Service Temperature - Long term°C-50 to +100
Coefficient of linear thermal expansionD-696cm/cm °C6.5x10-⁵
Tensile strength at yieldD-63810 mm/minMPa62
Elongation at breakD-63810 mm/min%>80
Impact falling dartISO 6603/1J40-400
Practical Thermal expansion/contraction ratemm/m3

Typical Physical Properties Notes ASTM Method Except Where Noted Otherwise

SUNPAL® polycarbonate system panels come in a variety of sizes and thicknesses. Multicell polycarbonate sheets with a thicker cell structure offer better thermal insulation, while tints determine the shading coefficient and solar heat gains.  Check with your local office for stock availability.

Technical Data

Flammability

MethodClassification*
EN 13501B, s1, d0
Flammability Notes
Depends On Panel Thickness.

Purlin Design – Recommended spans (For wind load of 1kPa) with Polycarbonate Joiner

TypePanel Width (mm)Mid-Span (mm)End-Span (mm)
SUNPAL 10 mm6001250950
SUNPAL 18/20 mm100013501000

Rafter Design – Recommended Spans (With maximum intervals of T-Fasteners along rafters for wind load of 1kPa) with Polycarbonate joiner

TypeRafters Center (mm)Internal Fasteners (mm)Fasteners at end Rafters Ends (mm)
SUNPAL 10 mm6021250950
SUNPAL 18/20 mm100213501000
Rafter Design Polycarbonate Note 1. The Above Spans Are Specified For Wind Loads Of 1000 Pa (21 Psf ) In Roofing Applications. For Vertical Or Internal Applications, Contact Your Local SUNPAL Distributor.
2. In Curved Applications, Aluminum Joiners Will Have To Be Pre-Rolled, While Polycarbonate Joiners Can Be Cold Curved To The Roofing Radius.

Maximum Spans Between Purlins

Type75kg/m² Single span75kg/m² Multi span-Mid span75kg/m² Multi span-End span100kg/m² Single span100kg/m² Multi span-Mid span100kg/m² Multi span-End span125kg/m² Single span125kg/m² Multi span-Mid span125kg/m² Multi span-End span150kg/m² Single span150kg/m² Multi span-Mid span150kg/m² Multi span-End span175kg/m² Single span175kg/m² Multi span-Mid span175kg/m² Multi span-End span200kg/m² Single span200kg/m² Multi span-Mid span200kg/m² Multi span-End span
SUNPAL 18 mm11001500117010001400117095013001015900120093080011509008001100860
SUNPAL 20 mm1200160012501100150012501000140010909501300101585012509758501200935
Max Spans Between Purlins Note 1. When Using An Aluminum Joiner Rather Than A Polycarbonate Joiner, Span Data In The Above Table Can Be Increased By 5%.
2. For Specific Data Or Any Other Planning Consultation, Please Contact Palram’s Marketing Support Department.
3. The Values Are Based On Deflection Criterion Of L/20 Of The Polycarbonate Panels.
4. The Table Is Valid For Purlin Installation Only.
5. The Dimensions Depicted Do Not Supersede The Requirements Of Local Construction Codes.

Purlin Design – Recommended spans (For wind load of 1kPa) with Aluminum Joiner – C

TypePanel Width (mm)Mid-Span (mm)End-Span (mm)
SUNPAL 10 mm60018001400
SUNPAL 18//20 mm100018001400

Rafter Design – Recommended Spans (With maximum intervals of T-Fasteners along rafters for wind load of 1kPa) with Aluminume joiner C

TypeRafters Center (mm)Internal Fasteners (mm)Fasteners at end Rafters Ends (mm)
SUNPAL 10 mm60218001400
SUNPAL 18/20 mm100218001400
Rafter Design Aluminium Note
1. The Above Spans Are Specified For Wind Loads Of 1000 Pa (21 Psf ) In Roofing Applications. For Vertical Or Internal Applications, Contact Your Local SUNPAL Distributor.
2. In Curved Applications, Aluminum Joiners Will Have To Be Pre-Rolled, While Polycarbonate Joiners Can Be Cold Curved To The Roofing Radius.

Components

Suppliance DataPart No. (Type)Component
Length: up to12m; Colours: panel matchedPolycarbonate Joiner
Quantity: each; Colours: Clear95788End-cap for Polycarbonate Joiner
Quantity: each; Sizes: 10mm, 18mm, Finish: Stainless steel95787 (10mm) ; 95902 (18mm)T-Fastener
Quantity: each; Sizes: 10mm, 18mm, Finish: Stainless steel95892 (10mm) ; 95901 (18mm)T-Stopper
Quantity: PK509001411Wood Screw; Stainless steel 10x35 for T Fasteners & T Stoppers
Quantity: PK509021785Metal Screw; Stainless steel 10x19 for T Fasteners & T Stoppers
Quantity: 45m / Roll10mm: 9001307; 18mm: 9003282Aluminum (Solid) Blocking Tape
Quantity: 33m / Roll10mm: 9003066; 18mm: 9003281Breather (Ventilated) Tape
Length: up to 6m; Finish: AnodizedAluminum Joiner
Finish: Mill (Natural) or AnodisedEnd-Cap for Aluminum Joiner

Thermal Insulation

TypeU-Value [Watts /m²·°C]R-Value [m²·°C / Watt]
SUNPAL 10 mm2.10.47
SUNPAL 18/20 mm1.50.67

SUNPAL® polycarbonate system panels come in a variety of sizes and thicknesses. Multicell polycarbonate sheets with a thicker cell structure offer better thermal insulation, while tints determine the shading coefficient and solar heat gains.  Check with your local office for stock availability.

Project Materials Calculator

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FAQ

Show FAQs
How do I curve the polycarbonate to follow the façade curve?
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All Palram polycarbonate products can be cold bent onsite during installation, subject to a minimum radius. The radius varies based on the chosen product. For flat sheets such as PALSUN & SUNLITE, the rule-of-thumb for the minimum radius is the thickness multiplied by 200. Please check the Palram catalog for more detailed specifications.

How do I specify the required thickness of the polycarbonate glazing material?
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The recommended thickness of the polycarbonate glazing material is based on factors such as wind & snow load, panel size, and boundary conditions. Visit the Palram website for access to calculators that can help you determine the recommended thickness.

How do I reduce the heat build-up coming from the façade into the building?
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In order to reduce heat build-up through the façade, Palram strongly recommends the use of its tinted SolarSmart™ panels. SolarSmart™ tints can be implemented in all Palram polycarbonate products. For more information, reference the Palram SolarSmart™ technology page.

What is the minimum allowed bending radius of polycarbonate?
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The minimum allowed bending radius of the polycarbonate is 200 times the thickness of the sheet, for example, a 2 mm sheet has a minimum 400 mm bending radius.

If polycarbonate sheets block UV radiation, why is there a “UV-side” that faces outwards?
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Polycarbonate sheets block UV radiation by absorbing it. This absorption mechanism can cause degradation to the material, and to prevent this from happening, the sheet is coated with a special material.

For this reason, it is recommended that the sheets are installed with the marked UV protective layer facing outward. Moreover, most of the sheets are only protected on the side that is clearly marked as such.

Will polycarbonate light transmittance deteriorate over time?
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PALRAM’s polycarbonate products are shielded with a UV protection layer that guards against photodegradation, yellowing, and brittleness. This protects the sheets from the harmful impact of UV radiation and helps to maintain light transmittance and quality for many years. Our products come with a 10-year warranty against loss of light transmittance. Upon special request, we can provide an enforced UV protection layer with a longer warranty.

How do I determine the color, Light Transmission (LT) and haze properties of polycarbonate?
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This decision depends on the application – some of the colors are transparent and some are translucent. If a see-through material is needed, then haze should be smaller than 1% and the LT% should be based on the illumination design. If a translucent effect is needed, then the haze should be 100% and the LT% based on the chosen color.

How do I create a double skin glazing solution for façades and curtain walls?
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Flat solid or multiwall sheets can be glazed in double skin applications using standard aluminum curtain wall profiles and EPDM gaskets. The SUNPAL system can be installed in a double skin application with a special aluminum profile provided by Palram.

Can flat solid polycarbonate be installed in a similar manner to glass in curtain wall applications?
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PALSUN can be installed with standard curtain wall aluminum glazing profiles and EPDM gaskets (similar to glass), or spider fixing spaced with approximately 400 mm centers. However, it cannot be used with structural silicone and PALGARD (PALSUN) with anti-scratch coating is the recommended substitute in this case.

When should I use multiwall polycarbonate and when solid polycarbonate?
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Multiwall polycarbonate should be used when the key design parameter is thermal insulation. Solid polycarbonate should be used when the key design parameter is acoustic insulation and glass-like appearance.

What is the difference between multiwall and solid polycarbonate?
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Multiwall is a multi-cell structured sheet. Due to its multi-cell structure, it has superior thermal insulation and low area weight.

How do I clean the polycarbonate?
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  • Never use abrasive or high alkaline cleaners on any Palram polycarbonate products.
  • Do not leave cleaners on Palram polycarbonate for extended periods of time. Rinse immediately with cold, clean water.
  • Do not apply cleaners in direct sunlight.
  • Never use sharp objects, squeegees or razors on polycarbonate.
  • Do not clean with gasoline.
  • Always practice safety first and never step directly on a polycarbonate panel.
  • Always test cleaners in a small inconspicuous area prior to cleaning the entire panel to ensure against adverse results.
  • Avoid allowing the pressure washer spray tip to come too close to the panel. Pressure washers often have enough pressure at the spray tip to penetrate or tear the panel.
  • Avoid dry cleaning as sand and dust particles clinging to the exterior of the panels may scratch the surface.