Product Details
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)

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
Black
Bronze
Creme White

Internal – Contoured

Internal – Flat
Glass Options

Rain

Obscured
Picture

Sliding
Single Hung
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
Product Specs
Brand: NT Windows
Series: Twinsulator™
Exterior Color: Creme White, Bronze, Black
- Interior Color Creme White, Bronze, Black
- Composition Aluminum extrusions
- Construction Type: New construction, replacement, or commercial
- Styles: Single Hung, Slider, Picture, Specialty Shape
- 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)