Lang Exterior, Inc, is a vinyl window manufacturer based in Chicago, IL.

We have been a window manufacturer since 1953. We currently manufacture over 30 types of windows and other vinyl products.

Our sister company, Top Coat Inc. is the leader of profile laminating in the window industry.

With Lang Exterior you know you're getting fast professional and reliable service.

With 55 years of experience, we have the ability to give exactly what you need. Our entire product line will ensure that you and your customer has the best vinyl window experience possible.

Beginning with our first vinyl windows back in 1953 we have made it our business to design the best vinyl windows possible.

Over the years we have constantly
upgraded our product to stay on top of the industry.

Our design and manufacturing are unsurpassed in design as well as construction.



The Lang Family

We cover every visible inch of our windows with our patented "Top Coat" process to give an amazingly natural appearance of wood. We pride ourselves in having the absolute best color selection in the industry. With over 27 possible color combinations, you can be sure we have the right window for you.

How would you sell vinyl windows if you don't have anything to show? Well with our marketing tools your never left in the cold. We have an entire line of selling materials that will include your companies logo printed right on them. Ask for details.