Premium Windows

Classic Series Architectual Shapes for New Construction

Classic Series Round-Top windows from Thermo-Tech decidedly enhance a home's character. Simplify the design process with our standard sizes in popular decorative shapes, including Elliptical, Quarter-Rounds, Half-Rounds, Extended Half-Rounds and Extended Elliptical windows. Combining standard styles maximizes your plan at a minimum cost. Or opt for custom sizes to perfectly match your design specifications. These windows work equally well as single units or joined with any of our window systems. Create combinations of shapes and styles for stunning curb appeal.


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  • Standard Glass

    Our Standard LoĒ²™ 272/Argon Glass Is Anything But Standard

    loe3_seasons_graphicThermo-Tech Classic Series Windows come standard with double-pane insulated LoĒ²™ 272/Argon glass featuring two panes of double-strength glass filled with argon gas for superior insulation. LoĒ²™ 272/Argon blocks enough solar heat that cooling loads can be cut by 25% or more compared to ordinary low-E and clear glass. The·heat of the sun is composed of visible light and invisible infrared energy. LoĒ²™ 272/Argon allows the daylight to pass through the glass and filters out solar heat, blocking 84% of the sun’s harmful ultraviolet rays. Plus the insulating value of LoĒ²™ is nearly double that of an ordinary non-LoĒ™ insulated glass.

    Available Glass Upgrades

    High-Performance LoĒ³™ 366/Argon

    Upgrade to LoĒ³™ 366/Argon heat-reflecting glass for even more insulating power and optimal thermal performance. LoĒ³™ 366/Argon heat-reflecting glass delivers the ideal balance of solar control, thermal performance, high visibility and the highest levels of energy saving in a double-pane insulated glass unit. Plus, LoĒ³™ 366/Argon provides excellent fade protection, blocking 11% more ultra violet light than standard LoĒ²™ 272 glass.

    • Lowers energy costs = saving on heating bill
    • Blocks 95% of harmful UV rays = reduced fading on carpet, furniture, etc
    • Year round comfort = cooler in summer, warmer in winter
    • Reduced condensation
    • Average heat loss reduction compared to standard double-pane glass is 50%

    Other Glass Options


    Obscure glass protects your privacy while allowing abundant light to enter the room. Choose from a variety of colors and texture patterns for a translucent to semi-opaque effect. Contact your dealer for more information. Visit our Dealer Locator or call 1-877-565-0159 for a dealer nearest you.

    Grey or Bronze Tinted

    Tinted glass provides additional shading from direct sunlight and warm conditions. A variety of tones and thicknesses are available. Contact your dealer for more information. Visit our Dealer Locator or call 1-877-565-0159 for a dealer nearest you.

    Tempered Safety Glass

    Tempered safety glass is extremely strong and often used for its safety characteristics. If tempered saftey glass does break, it breaks into small pieces without sharp edges. Standard for patio door, side lights and even bathroom shower and tub enclosures, tempered safety glass is ideal for reducing the likelihood of injury in the event of breakage. Contact your dealer for more information. Visit our Dealer Locator or call 1-877-565-0159 for a dealer nearest you.

  • Color Options

    Exterior Frame Colors

    In addition to standard white vinyl, frames are available in two other exterior colors to match virtually any home style or color.








    Interior Wood Laminate Colors

    Get the warmth and classic beauty of wood with the comfort and ease-of-maintenance of vinyl. At Thermo-Tech, we never stop improving our vinyl windows and doors. We always start with expert design, durable construction and maintenance-free 100% virgin vinyl. But it’s the finishing touches that are turning heads – like our wood laminates featuring the warmth of wood and the maintenance-free insulating power of vinyl.


    Light Oak


    Dark Oak

    Available on our 2-lite Classic Patio Doors, Fixed Casements, Direct-Set Picture Windows, Double-Hungs, Sliders, Casements, and our Geometric and Radius Windows. Available in White or Sandlewood exterior.

  • Distinctive Grid Styles


    Flat grids between the glass are available in a variety of configurations and colors to match our vinyl windows and doors.

    Flat Grids Configurations


    Grid configurations vary by window style and size. Please ask your dealer for more information about grid options for specific window styles and sizes.

  • Energy and Structural Performance Data

    Thermo-Tech Premium Windows and Doors are thoroughly tested for structural and thermal performance according to the most widely recognized national standards, including the American Architectural Manufacturers Association (AAMA) window specifications. The numbers tell the story: every Thermo-Tech product is built for a lifetime of reliable, energy-saving performance.

    When you're shopping, compare structural and thermal performance ratings. Look for the performance grade (PG), which measures the window’s resistance to wind and rain. The higher the PG rating, the better. And check out the National Fenestration Rating Council (NFRC) label for an accurate method to evaluate a product’s energy performance and to ensure the windows are Energy Star® compliant in your area. Thermo-Tech windows are Energy Star® rated in both the U.S. and Canada.

    See how Thermo-Tech Premium Windows and Doors measure up. Check out the performance data >

Classic Series Window Styles

Select a window style from below to learn more.

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warm edge technology

Warm Edge Technology

Reduces interior condensation and cloudy glass.

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insulated glass

Insulated Glass

At the heart of every Thermo-Tech window and door.

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Inspirations Photo Gallery

Some of the most photogenic windows and doors around.

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