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NT Window

Twinsulator™

Twinsulator™ aluminum windows are crafted from powder-coated aluminum extrusions, which offers strength and thermal performance. These windows require little to no maintenance.

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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. 

Free Estimate
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The very best in aluminum window construction

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Designed for residential and light commercial applications

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Engineered and constructed for extreme weather protection and energy efficiency

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ThermaProtect™ insulation barrier improves the window's performance

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Limited Lifetime Transferable Warranty, optional Glass Breakage Warranty available

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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
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Colors

Creme White
Bronze
Bronze
Black

Grid Options

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Internal Flat
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Internal Contoured

Opaque Glass Options

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Rain Glass
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Obscure Glass

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Single Hung
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Sliding
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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
double-hung-white

Sliding

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

Dual Pane, Cardinal LoE3-366 with Argon
sliding-window

Picture

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

Dual Pane, Cardinal LoE3-366 with Argon
picture-window

Product Specs

Brand
NT
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 Sash
Yes
New Construction Fin
Optional
Mobule/Stucco Fin
Optional
NFRC Ratings
Yes
WDMA Hallmark Certification
Yes
AAMA Certification
Yes
Warranty - Residential
Lifetime
Warranty - Commercial
10 Year (Extended available)

What our customers are saying

"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

Frequently Asked Questions.

Below are some of the questions we get the most. If you can't find your question, please reach out and ask your question today.

Do you work with both homeowners and builders?

What do windows cost?

Do you deliver to the build site?

What are your office hours?

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Service Area

Wondering if we serve your area? We proudly offer window and door replacement services across Texas, including:

Dallas-Fort Worth Metroplex

Since our founding in 1979, we've offered window and door replacement services to homeowners in the Dallas-Fort Worth Metroplex.

Headquarters & Showroom

Our headquarters is located in the Entertainment District of Arlington, Texas. Feel free to drop in during business hours to get a feel of our products in person.

Greater Houston Area

Brennan Enterprises proudly serves homeowners in the Greater Houston area, delivering trusted window and door solutions backed by expert installation.

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Let’s Get Started

Transform Your Home with Your Local Window Pros

Ready to experience the difference of working with Texas’s leading window and door replacement company? Book your free consultation today and let’s create something amazing together!