Did you know Lang Exterior first opened its doors in 1953?
Join us in celebrating 65 years in business!
Did you know Lang Exterior offers aluminum windows? Ultra Tuff aluminum windows are perfect for commercial use and have an innovative thermal break that makes them unbeatable for interior comfort.
> View Ultra-Tuff Aluminum Double-Hung Windows > View Ultra-Tuff Aluminum Picture Windows
Did you know Lang Exterior offers expert window and door rescreening while you wait at our main Chicago location and did you also know that this service is available directly to the public, without a contractor?
> Find out more about Window and Door Rescreening > Rescreening Hours and Location
Thank you for your support for the past 65 years! We would like to repay you with NEWLY REMODELED SHOWROOMS 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 showrooms to introduce your clients to our many products.
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
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