It's easy! You make a list of the windows you want, print it, and give it to your contractor. Make all of your option choices by building the window just the way you want it. Customize each window with every individual option. No struggling with measurements, no self-installation, just the perfect windows.* Build Your Windows now!

* Lang Exterior is in no way responsible for your order and options that your contractor chooses on your behalf.

Thank you for your support for the past 64 years! We would like to repay you with A NEWLY REMODELED SHOWROOM AT OUR CORPORATE AND NORTHSIDE LOCATIONS FEATURING OVER 70 DIFFERENT WINDOWS on display, including Bows, Bays, Garden Windows, and our full line of Platinum windows! Please use our showroom to introduce your clients to our many products.

Lang Insulated Glass Units

Did you know that Lang Exterior manufactures and sells Insulated Glass Units in addition to complete windows? Our customers can order IGUs with the same glass options as our windows, including grids, V-Groove, Enhanced Glass with Argon and Low-E and many more!

> How to become a Lang customer

Now Available: Aluminum Windows

Did you know Lang Exterior offers aluminum windows? Ultra Tuff aluminum windows are perfect for commercial or residential use and have an innovative thermal break that makes them unbeatable for interior comfort.

> See Ultra-Tuff Aluminum Double-Hung Windows           > Check Out Ultra-Tuff Aluminum Picture Windows

Look for the Lang Exterior Window Sticker!

You know it's a quality product when you see our logo! The image at left shows the sticker that comes on every window we make.

Remember that Lang Exterior products are and have always been made in the USA! Learn more:

> VIDEO: Products made in the USA
> VIDEO: IGU production at our factory - showing the Lang sticker applied to the glass as a final production step

Click Here To Like Us on Facebook
Keep up with the most up to date savings offers when you like us on Facebook. Put the profit in your pocket with Lang Exterior!

How-To Videos by Lang Exterior

Learn how to clean the exterior of a Lang double-hung window. Learn about removing a sliding window sash and check out all of our other videos.

See Videos on Operating Lang Windows
More Videos: Inside Our Factories in Chicago, Illinois


Triple-Pane R5 Windows
U-Value .20!

R5 is the most energy efficient triple-pane option available.

Learn more about R5 triple pane windows and doors

View products with the R5 option:

Platinum Series
Powerweld Series
Renaissance Series
Glide Patio Doors