Premium Windows

Classic Series Cottage Style Windows for New Construction

Classic Series by Thermo-Tech Single-Hung and Double-Hung windows are now available in Cottage Style. Choose a larger bottom sash to retain the original architecture of your home on retrofit applications. Or use the larger bottom sash to keep the meeting rail from your line of sight in your lake home. These windows have the same great Thermo-Tech quality as our standard Single-Hung and Double-Hung units.

Please specify Thermo-Tech double-hung (TDH) or Thermo-Tech single-hung (TSH) when ordering. Grid configuration will change, depending on type of unit.


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

Frame Colors

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








Custom Hardware Colors

Heavy-duty low-profile hardware is available in white, tan or sandlewood to match your window color. Or choose optional metallic finishes for a more elegant look.

Standard Hardware Colors






Custom Hardware Colors



Antique Brass


Rubbed Oil Bronze


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.


Warm Edge Technology

Reduces interior condensation and cloudy glass.

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Insulated Glass

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

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Photo Gallery

Some of the most photogenic windows and doors around.

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