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Why Choose Lang Windows and Patio Doors?
Oldest Vinyl Window Manufacturer in the Midwest
How many window manufacturers can say they have been in business since 1953?
Lang Exterior can.
Learn More about Lang Exterior's history
Quality Standards
We at Lang pride ourselves on the quality in every detail of our windows, and from the virgin vinyl that we extrude ourselves to our advanced fusion welding process to the great number of other features that go into a Lang window, we believe in our products.
Lower Price Guarantee
We will beat any price on a comparable window by 10%.*
That's our lower price guarantee and it proves our dedication to
"the best product at the best price."
* Ask for details
Color and Finish Choices
We know how important colors and woodgrains are, and we give you over 30 combinations, including bronze and clay. We are the only company that offers bronze inside and out.
Energy Efficiency
With energy efficiency ratings as high as "R5,"
Lang windows and patio doors help reduce energy use
and lower heating and cooling bills.
Learn about R5 windows and patio doors from Lang
Browse windows
Custom Built
We do not limit you to stock sizes - all of our windows and patio doors are custom made in our factory and can be ordered in 1/8" increments.
American Made
Not only do we manufacture the products we sell, we also make our windows and patio doors right here in Chicago, Illinois!
Warranty
We stand behind our products and have been doing so for over fifty years.
See our full warranty.
Fast Lead Time
In most cases your windows are made within 3 to 5 business days! Because we make our windows in our own factory right at our location, there is no added delay.
Matching Laminated Trim
When you buy a woodgrain-finished window, you want the interior trim to match.
Lang Exterior can make the trim for you, in the same finish as the window.
See all laminated trim styles.
Decorative V-Groove Glass
Our "V-Groove" decorative glass can create a great impression, and with over 10 styles to choose from you can get just the look you want.
Customer Service
Call or stop by one of our locations and we know you will find our customer service friendly and knowledgeable. We strive for customer responsiveness that is as innovative as our windows.
Open Six Days a Week
Are we open Saturdays? Yes!
Lang Exterior always goes the extra mile to serve you.
View hours and locations.
Available Nationwide
If our Chicago locations are not convenient for you, we can ship to most addresses nationwide.
Window Repair
Bring in your broken vinyl sash or window
by 8 am, you will have it back by 3:30 pm!
Lang Exterior offers this service directly to the public.
Learn more about Lang's expert vinyl window glass repair/reglazing
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Lang Exterior owns all rights or has license to such rights for its associated trademarks and copyrights of pictures on this website and company brochures. Lang Exterior does not authorize any customer or third party to use any of its associated trademarks, pictures or marketing information contained within this website and company brochures to mislead Lang Exterior current and potential customers as well as infringe on any such trademarks or copyrights described herein. Further, any customer or third party providing such trademarks, pictures, or information to mislead current or potential customers or infringing such trademarks and copyrights described herein will be liable under applicable law. If any legal fees occur the person committing the infringement will be responsible for all costs.