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Home    Products    Flat Sheets    THERMAGLAS™ Family of Products    THERMAGLAS™ Plus

THERMAGLAS™ Plus

Multiwall Polycarbonate for Commercial Greenhouse Applications

ThermaGlas™ Plus products are designed and engineered specifically for commercial greenhouse use. Most ThermaGlas products are available in 4-foot or 6-foot widths in clear, or with specially formulated pigmentations. ThermaGlas Plus offers 99.5% UV protection.

Main Benefits
  • Superb thermal insulation—saves energy
  • Built in condensation control
  • Impact resistance—virtually unbreakable
  • Light weight
  • Weather and UV resistant
  • Low flammability (available with CC1 rating)
  • Easy to work with and install using ordinary tools
  • Rigid, yet capable of cold-forming to an arch
  • Wide service temperature range
  • 10-year limited warranty
  • Available in 47-1/4" , 48" , 71-1/4" and 72" widths
Typical ApplicationsPrimary Applications:
  • Commercial greenhouses
  • Retail garden centers
  • Packing & holding areas

Secondary Applications:
  • Skylights and sidelights
  • Signs and displays
  • Covered walkways
  • Industrial roofing & glazing
  • Swimming pools
Other InformationPalram relies exclusively on its master distibution partner and converter, Green-Tek to manage all facets of the ThermaGlas product line, including marketing, sales, warehousing, cutting, and logistics for full-size master-length sheets.

In turn, the ThermaGlas family of products are sold through commercial greenhouse distributors and greenhouse manufacturers.

Outside of North America, ThermaGlas Plus is sold under the brand name "Sunlite Plus."

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.
I'd like to build a greenhouse. What are my options?
With Palram, there are several options. For hobbyist and homeowners our sister company, Palram Applications, offer easy-to-assemble greenhouse kits. Palram Applications products are available through many online resellers, and select retail garden centers throughout North America.

If you plan to design and build your own structure for your home, consider our Suntuf corrugated polycarbonate panels. Our Sunlite multi-wall panels are available in select markets as well. Suntuf is widely available at Home Depot's throughout North America, as well as many indepent retailers. Sunlite is available at select Home Depot's and some independent retailers.

For commercial applications, our DynaGlas and ThermaGlas panels are a great choice. DynaGlas and ThermaGlas are available from Commercial Greenhouse Manufacturers and Greenhouse Supply Distributors. Contact our Master Distributor, Green-Tek, for a Dealer near you.

Feel free to contact us with your specific needs and we'll help you make the best decision for your application.
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.
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.
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!
Why are there polyethylene films on certain sheets and should I peel it off?
The surface films in certain sheets, like Sunlite and Palsun sheets, are needed for protection against dirt and scratching, and also used to carry important information to the installer and final customer. The indication of the UV protected side that should be installed facing outwards is extremely important.It is recommended to peel off the protective films only after installation. In case this will not be feasible and the film will be peeled off before laying the sheets, it must be remembered to at least mark the UV protected surface, so that the sheet will not be installed inside out.

Note: wrong installation damages are not covered by Palram.Please also 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 gluing of that film to 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.
Do plastic roofing sheets really block UV radiation?
Some of them do. Rigid PVC and polycarbonate sheets are practically opaque to UV radiation, making them a perfect barrier against this harmful radiation. They actually block UV-A and UV-B radiation better than nearly any sunscreen lotion.

On the other hand, acrylic roofing sheets generally transmit a considerable portion of the UV radiation.
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.
For Sunlite and ThermaGlas multiwall panels, can I leave on the masking tapes that block both ends?
No. These tapes are good for packaging/storage only, and are not strong enough for field service.

After installing sunlite sheets, seal top end with aluminum foil ‘Solid tape’, and bottom end with special ventilating ‘Breather tape’.
Should I paint the structural rafters with any paint?
Yes, you can paint structural rafters or supports, but be sure to paint only with light or white color. Do not use dark colors like black or brown, that can absorb and reflect intensive heat.
What's the difference between ThermaGlas® and Sunlite®?
ThermaGlas™ branded products are engineered specifically for commercial greenhouse applications. Panel widths, thicknesses, pigments, and special greenhouse-specific features such as guaranteed condensate control are consistent with commercial growers' needs. Aside greenhouse-specific features, ThermaGlas is the same as Sunlite (for equal thicknesses, weights, and panel widths). Outside of North America, Palram uses the Sunlite Plus brand as opposed to ThermaGlas.
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:
http://www.vinylinfo.org/Recycling/VinylRecyclingDirectory.aspx
For polycarbonate products, visit The Association of Post Consumer Plastic Recyclers site and download their materials buyers and seller's list:
http://www.plasticsrecycling.org?
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.
THERMAGLAS™ Plus
ThermaGlas 8mm Triple-Wall Polycarbonate used to cover a Retail Garden Center.
THERMAGLAS™ Plus
ThermaGlas 8mm Triple-Wall Polycarbonate used to cover a Retail Garden Center.
THERMAGLAS™ Plus
ThermaGlas 8mm Triple-Wall Polycarbonate used to cover a Retail Garden Center.
THERMAGLAS™ Plus
ThermaGlas 8mm Triple-Wall Polycarbonate used to cover a Retail Garden Center.
THERMAGLAS™ Plus
ThermaGlas 8mm Triple-Wall Polycarbonate used to cover a Retail Garden Center.