NT Window Twinsulator™ Aluminum Windows

NT Window Twinsulator™

Twinsulator™ aluminum windows have the slimmest frames. Aluminum windows allow homeowners to maximize glass surface and views without distracting frames. 

NT's aluminum series is crafted from powder-coated aluminum extrusions which offer strength and thermal performance. 

  • The very best in aluminum window construction
  • Engineered and constructed for extreme weather protection and energy efficiency
  • Designed for residential and light commercial applications
  • ThermaProtect™ insulation barrier improves the window's performance
  • Lifetime Limited Warranty (refers to Twinsulator Series Residential Product Warranty)

Windows Made in the USA



  • Features
  • Colors
  • Grids & Glass
  • Styles
  • Performance
  • A: Powder coated aluminum extrusions

    B. ThermaProtect thermal break insulation barrier to protect from the elements

    C. 3/4" dual glaze cardinal LowE 366 Double Strength Glass

    D. Warm edge super spacer for increased efficiency



  • White
  • Bronze
  • Almond
Grids & Glass

Grid Options

  • Internal - Flat
  • Internal - Contoured


  • Rain
  • Obscure

Window Styles

  • Single Hung
  • Sliding
  • Picture

Twinsulator Glass Performance

  • Single Hung

    U-Factor: 0.43
    SHGC: 0.23
    Frame Depth: 2-5/8"
    AAMA Rating: C40

    Dual Pane, Cardinal LoE3-366 with Argon

  • Sliding

    U-Factor: 0.42
    SHGC: 0.22
    Frame Depth: 2-5/8"
    AAMA Rating: LC40

    Dual Pane, Cardinal LoE3-366 with Argon

  • Picture

    U-Factor: 0.33
    SHGC: 0.25
    Frame Depth: 2-5/8"
    AAMA Rating: LC60

    Dual Pane, Cardinal LoE3-366 with Argon

So far I have enjoyed my new windows very much! Lets plenty of sunlight into my house now. No more feeling drafts coming from the windows.

— Sheila, Review from NTwindow.com

Product Specs

Brand NT Windows
Series Twinsulator™
Exterior Color White, Bronze, Almond
Interior Color White, Bronze, Almond
Composition Aluminum extrusions
Construction Type New construction, replacement, or commercial
Styles Single Hung, Slider, Picture
Frame 2-5/8"
Thermally Broken Frame Yes
Thermally Broken Sash Yes
New Construction Fin Optional
Mobile/Stucco Fin Optional
Energy Star Certification Yes
NFRC Ratings Yes
WDMA Hallmark Certification Yes
AAMA Certification Yes
Warranty - Residential Lifetime
Warranty - Commercial 10 Year (Extended available)


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