Skip to main content
Free Estimate
Search for topics or resources
Enter your search below and hit enter or click the search icon.
Close Search
Windows
Windows
By Material
By Material
Vinyl Windows
Wood Windows
Aluminum Windows
Fibrex Windows
By Brand
By Brand
Andersen Windows and Doors
Brennan Windows
NT Window
Alside Windows & Doors
By Style
By Style
Single Hung Windows
Double Hung Windows
Casement Windows
Picture Windows
Sliding Windows
Awning Windows
Bow Windows
Specialty Shape
All Windows
All Windows
All Windows
Exterior Doors
Exterior Doors
By Material
By Material
Fiberglass Doors
Wood Doors
Vinyl Doors
Aluminum Doors
Fibrex Doors
Steel Doors
By Brand
By Brand
Andersen Doors
ProVia Doors
Centor Doors
NT Window Doors
By Style
By Style
Lift and Slide Doors
Folding Doors
Sliding Patio Doors
French (Hinged) Doors
Pivot Doors
Front Doors
View All Exterior Doors
View All Exterior Doors
View All Exterior Doors
Services
Services
Window Replacement
Exterior Door Replacement
Design-Build Windows & Doors
New Construction Supply
Windows & Doors for Pros
View all Services
Service Area
Service Area
Dallas-Forth Worth
Houston
View All Service Areas
Learning Center
Learning Center
Learning Center
Video Library
Blog
Projects
Inspiration Gallery
Pricing
Pricing
Pricing Info
Instant Pricing
Financing
About Us
About Us
About Us
Meet the Team
Careers
Reviews
Warranty & Service
Contact Us
For Pros
Virtual Showroom
Financing
855-819-9259
Free Estimate
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.

black-aluminum-replacement-windows
black-aluminum-twin-single-hung-windows
black-twin-single-hung-aluminum-windows-in-stucco
twinsulatior-bronze-aluminum-windows-patio
twinsulatior-bronze-aluminum-windows

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
check_badge

The very best in aluminum window construction

check_badge

Designed for residential and light commercial applications

check_badge

Engineered and constructed for extreme weather protection and energy efficiency

check_badge

ThermaProtect™ insulation barrier improves the window's performance

check_badge

Limited Lifetime Transferable Warranty, optional Glass Breakage Warranty available

check_badge

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
twinsulator-sh-features

Colors

Creme White
Bronze
Bronze
Black

Grid Options

nt-grids-internal-flat
Internal Flat
nt-grids-internal-contoured
Internal Contoured

Opaque Glass Options

nt-glass-rain
Rain Glass
nt-glass-obscure
Obscure Glass

nt-window-style-single
Single Hung
nt-window-style-sliding
Sliding
nt-window-style-picture
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 offer free estimates?

Are you local?

Do you deliver to the build site?

Can you convert a window into a door or a door into a window?

Free Estimate

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.

Free Estimate Explore Virtual Showroom
dark-frame-windows
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!