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Corrugated Foamed Polycarbonate Sheet

SUNTOP Corrugated Foamed Polycarbonate is a breakthrough innovation from Palram. It’s a lightweight roofing & siding product that is opaque, rigid, and highly impact resistant. In fact, it stands up to garden rocks, golf balls, and even baseballs (video below). Suntop is available in rich solid colors that provide 100% shade, and protection from harmful UV radiation. Suntop can stand up to Mother Nature’s full range of hot and cold temperatures, and her most brutal weather.

Installation VideosFAQ'sWhere to Buy

Project Photos


Weather protection & shade for outdoor living or storage.

Suntop® Corrugated Foamed Polycarbonate is lightweight, super tough and easy to install. Use it to cover just about any type of outdoor patio cover, pergola, storage shed, or shelter.

Use for roofing or siding on virtually any type of structure.

Suntuf Application Image 1-1Suntop Application Image 1-2Suntop Application Image 1-3

Rich, bold colors. 100% shade.

Suntop is available in three opaque colors, and each provide 100% shade (by comparison, Suntuf® is transparent or transluscent and lets light shine through). The color swatches below are provided for reference only as on-screen color may vary. Visit your local dealer to see actual panels. You can also request samples from your dealer.

Suntop Standard Color Swatches Image
See how Suntop colors compare.

So tough, other panels are jealous.

Suntop is tough, and it won’t dent like typical corrugated metal panels for DIY applications. Suntop easily withstands snow, ice and temperatures ranging from -40° to 212°F (-40° to 100° C). And with more rigidity and up to 20 times more impact resistance than fiberglass, it offers the best hail protection available in opaque polycarbonate products. See how well Suntop holds up to garden rocks, golf balls and baseballs. Watch the “How tough is Suntop? video.”

Take a peek at the basics of installation.
How to Store (44 sec. video)
How to Cut (44 sec. video)
How to Fasten (1:18 min. video)

Button: Watch Full-Length Installation Video on YouTube

Button: Watch Full-Length Installation Video on YouTube

Pick a panel length. Select accessories.

2-foot wide panel lengthsSelect accessories image
[Note: Any length panel shown on this page can be special ordered by visiting the Pro Desk or Special Order Desk at a participating reseller. Panels must be shipped to store for pick-up.]

Crunch numbers. Find a reseller.

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Main Benefits
  • Impact and UV resistant
  • Lightweight and easy to install
  • Rust-free
  • Enables curved roofing (cold bending)
  • Bright and long-life colors
  • Wide service temperature range
  • Good thermal insulation
  • Environmentally friendly material
  • 100% UV Protection
  • 10-Year Limited Warranty
Typical Applications
  • Patio & Deck Covers
  • Pergolas
  • Canopies
  • Sheds
  • Warehouses
  • Outbuildings
Other InformationCCMC Approved Logo Canadian National Building Code Compliance
CCMC Approved
CCMC Report #13450-R

Ecolite Logo Recycled and Recyclable
Suntop is made with as much as 100% recycled polycarbonate and is 100% recyclable, making it one of Palram’s Ecolite™ class of products.

Do I really need to buy Palram's recommended closure strips and screws?
In order to ensure long-term warranty coverage, it is highly recommended to use Palram-approved fasteners and accessories. Palram corrugated products, fasteners and accessories should be thought of as a system meant to provide the best possible installation. Proper use of the complete system (panels, closure strips, fasteners, etc.) greatly reduces the possibility of problems and insures that product warranty will be honored. Please see the installation instructions for the specific product for details.
Why can't I just nail the panels into place?
There are a couple of problems with nailing Palram panels. First, there is significant possibility for impact damage to the panel in the area of the attachment. Second, nailing the panels in place prevents them from safely expanding and contracting with temperature change, resulting in warping of the product. Please be sure to read the installation instructions available on each product's document page on this website.
Why do I have to predrill fastener holes?
Predrilling the holes insures the panels will have room to expand and contract properly with temperature change. Skipping this step can lead to distorted or warped panels. Please be sure to read the installation instructions located on the specific product's document page.
How do I cut these panels?
Corrugated and Multi-wall panels may be cut with a circular saw (using a very fine-toothed blade for plastic panels, veneer, or plywood). For best results, it is often better to cut a few corrugated panels at a time to reduce vibration; clamping the panels also helps. Also, if using a standard circular saw blade, better results may be seen by running the blade backwards (turn it over to reverse direction). Panels may also be cut by hand by carefully using tin snips or a utility knife. For other cutting instructions and further details, please visit each product's document page. You can also view our general Corrugated Products Installation Overview video.
What are purlins and closure strips?
Purlins are cross members, or horizontal supporting members, running across the rafters of your structure. Suntuf, Palruf, Sun 'N Rain, and Suntop panels are fastened to purlins. Closure strips match the corrugation pattern of the panels and are attached to the purlins. Closure strips can be made of wood, foam, or plastic. Please see each product's document page for complete installation information.
Do Palram products keep the "heat" out?
Palram products are available in a variety of colors (varies by product), each with its own heat and light transmission properties. While all Palram panels block virtually 100% of harmful UV radiation, there are variations in heat and light transmission.

Clear panels allow most solar light and heat through while lighter, opaque colors are more reflective. If excessive heat buildup is a concern, our "Solar Control" panels are you're best bet. Please see each product page for more information on color offerings, light transmission percentages and warranty terms.
How long do the panels last?
Palram manufactures a variety of different products for different applications. Most have industry-leading warranties against manufacture-related defects, as well as specific warranties related to the intended use for the product. However, with proper installation and maintenance, we expect our products to far exceed the warranty periods.

Many of our products are engineered to be installed outdoors and are warranted accordingly. Nevertheless, the lifespan of outdoor products can be affected by how well they were installed, as well as environmental factors like air pollution, winds, and erosion by sand particles.

Warranty details can be found in the Downloads tab under the Warranties section at the bottom of the page for each individual product.
Is there a paint that is appropriate for polycarbonate?
Unfortunately we can’t recommend painting our panels. While polycarbonate is a very resilient material, it is potentially sensitive to chemicals contained in many exterior paints. While we can test a paint for compatibility, we have no way of controlling whether a paint manufacturer will remain consistent with their formulas over time.
What should I use to clean my panels?
Warm water with a mild household detergent should be sufficient to clean Suntuf or Sunlite panels. Wipe off any remained dirt with a soft cloth and wash again. NEVER use a solvent based cleaner (ammonia, etc.). AVOID using sponges or brushes that can scratch the panels surface.
My building inspector says I need to know your flame spread rating. Can you provide this information?
Yes. We can provide test reports and other such documents. Please contact your Palram Dealer if you require these data, or Contact Us. This is technical data and is not to be considered a warranty.
Do Palram accessories come in all of the same colors the panels do?
No. Palram accessories are available in some standard colors, and they may need to be specially ordered depending on your retailer.
In roofing with corrugated panels, where should I start?
You can choose to install left to right, or right to left, or start at the middle and continue to both sides. It is recommended to always advance against the dominant wind at the site. Never start at both sides, or at any two separate points.
In roofing with corrugated panels, should I insert screws at the corrugation valley or crest points?
Crest fastening is always be preferred, but some corrugated product require fastening in the corrugation valley. See the individual Installation Guide for each product to see specific instructions.
Is it OK to screw in fasteners using a power screwdriver or screw gun?
Adjustable electric screwdriver is allowed, provided you set the torque to the minimal needed, in order to prevent over-tightening and local deformation of the panel. For that reason, pneumatic tools should be avoided.
Is it OK to walk over roofing sheets while in storage, during or after installation?
No. In case it can’t be avoided during installation. It's recommended to use a crawl board that is strong enough to support the weight of the person, and that spans at least three purlins or supporting members.
How should I store packed sheets?
Store in a protected, shaded, ventilated site, with no direct exposure to sunlight and winds. In outdoor temporary storage cover with opaque protective film, and avoid PVC films and heat-absorbing materials. Please note: Surface protective films that cover sheets are highly sensitive to heat and direct sunlight. Excessive heat and direct sunlight before taking off the film can cause that film to bond the sheet surface, after which it will not be practically possible to remove it from the sheet!
Can the sheets be curved?
Yes. Sheets can be cold-curved and serve in arched shapes, provided the relevant Palram specifications for minimum radius in cold curving are followed. These specifications can be found in the Installation Instructions of the relevant sheets.

Solid sheets can be cold-curved in any direction.

Corrugated sheets can be arched so that the corrugations themselves are curved (lengthwise).

Multi-wall sheets can be arched so that the actual ribs will be curved (lengthwise).

Curving is not recommended across the ribs direction.
Can these sheets catch fire?
Yes. In principle all plastic materials are flammable, and will catch fire in presence of exterior flame. The ignition temperature of polycarbonate sheets is 490ºC (915ºF), and PVC sheets 391ºC (736ºF). Both materials are self extinguishing, and fire will decay when the exterior flame source is removed. Compared to PC and PVC, acrylic sheets are more flammable.
If polycarbonate sheets block UV radiation, why is there a ‘UV side’ to face outwards?
Polycarbonate (PC) inherently blocks UV radiation by absorbing it and not allowing it to pass through the panel. However, the absorption of UV also degrades polycarbonate, therefore, the sheet(s) has to be protected against UV radiation. Most Palram PC products feature a very thin co-extruded layer of UV-resistant PC resins that protect the entire sheet from UV radiation. In most cases, UV protection is applied to one side, however, two-sided UV protection is available for select products. 

In order to ensure the protection of single-sides UV protected sheets, they must be installed with the marked UV protective layer facing out toward the sun. Although sheet products can also be UV protected on both sides, most of the sheets are protected on one side that is marked clearly.
Can I recycle my old polycarbonate or PVC panels?
Palram's Polycarbonate and PVC sheet products are recyclable. Many cities and towns have recycling programs that include curbside pick-up. If so, Polycarbonate products such as SUNTUF, SUNLITE, PALSUN, DYNAGLAS, or THERMAGLAS should be marked "Plastic #7" prior to recycling. PVC products such as PALRUF, AG-TUF, PALOPAQUE, PALCLEAR, or PALIGHT, should be marked "Plastic #3".

If local recycling is not available, other resources are available:
For PVC products, visit the Vinyl Institute's Recycling Provider Database:
For polycarbonate products, visit The Association of Post Consumer Plastic Recyclers site and download their materials buyers and seller's list:
How can I determine if a sealant is compatible with Palram's polycarbonate products?
Palram tests various sealants for compatibility with its polycarbonate product. We attempt to purchase sealants that are widely available at home improvement stores and lumber yards. Click here to learn more about sealant compatibility and to download a list of product that have been tested.
In light of the change from "CCA" treated wood to "ACQ" treated lumber should there be a more protective screw used with the installation of Suntuf or other covering products?
The new guide lines by the manufacturers of the ACQ lumber call for heavily galvanized or stainless steel due to the corrosive nature of the ACQ treatment. The change in the treated lumber chemical is a concern. Manufacturers of ACQ do recommend the use of either stainless steel or hot dipped galvanized fasteners (which Palram’s fasteners are not made from). That said, you have two basic options for using ACQ lumber:

1. Use a comparable fastener made from an ACQ approved material. Make sure that such a fastener uses either a neoprene or EPDM washer and that it is installed per Palram’s recommendations.

2. Use Palram’s fasteners. Initial tests with ACQ have shown no adverse effect on our fasteners. This is added to the fact that the fasteners are being used to secure a light weight plastic panel (rather than connect structural members). If you use our fasteners, our 10 year warranty will still apply.
I am planning to use either Suntuf or Suntop polycarbonate panels for a roof over my deck. Is there a recommended cement I can use on this material? Will clear PVC cement work?
No, don't use PVC cement. PVC and polycarbonate do not react well. Also, generally speaking, the panels are not recommended to be "glued" together. For sealing, 100% silicone caulking is safe and generally works well.
The universal plastic closure pack has 1/2 inch countersunk holes where the wood screws go, the wood vertical strips do not. Am I missing something? How are the screws going to hold the panel down if they are under the panel, Or do the screws go into the small rectangle holes?
I know it’s confusing, but they go in the rectangular holes.
Why does dripping occur on the underside of my panels?
If you have installed, or are planning to cover a patio or sunroom with Suntuf, Suntop, Palruf, Palsun, or Sunlite, it is possible that you may experience water droplets dripping from the underside of the panels, especially at the horizontal supporting members. This is almost certainly due to condensation build up on the underside of the panels. The condensation that forms is not a direct result of the Suntuf panels but rather the surrounding environment in which the panels are installed. To learn what condensation is, why it occurs, and a few suggestions that can help minimize it, download Tech Brief #5007.
Which of Palram's products have received CCMC Approval?
Several of Palram's covering and glazing products have received CCMC Approval. For details, click here.
Residential pergola covered with Suntop® Corrugated Polycarbonate.
Suntop garden shed/playhouse
Storage shed covered with Suntop Sedona Brick red on the sides, and Castle Gray on the roof.
Patio cover covered with Suntop Castle Gray.
 SUNTOP Corrugated Foam Polycarbonate used for awning.