STL Windows Direct Is Your Trusted
St. Louis Windows Installer
The Sky’s the Limit for Your New Windows!
STL Windows Direct is a division of STL Design and Build. When we remodel kitchens, bathrooms and basements, window and door replacement is often part of the project. STL Windows Direct was born because we realized our customers wanted premium quality in an affordable window. In response, we created a better, more energy-efficient, longer-lasting window that is designed specifically for the St. Louis weather. Our exclusive windows are at a competitive price point and still offer a lifetime warranty and transferable warranty!

STL stands for Sky’s the Limit, a daily reminder that we want to deliver STL service and quality. The STL venture was formed when two local St. Louis families – friends since college – joined forces. Our managing partner is a second-generation home builder, past director of the HBA and a Homer Awards Chairman.
Designed Specifically for the St. Louis Weather
Our ecoSmart 365 windows are engineered for St. Louis weather, where we often experience two to three seasons in the same day, resulting in pressure on windows due to expansion and contraction. These custom-made windows are made, measured and designed to perfectly fit each opening.
Replacing all of your windows with STL Windows Direct can save you up to 35% on your energy bills, which means your windows will pay for themselves! The same person who measures the windows also installs them, which helps reduce errors. We buy our windows factory-direct so there’s no middleman, resulting in cost savings for you.
With STL Windows Direct, you get quality performance and premium windows for up to 40% less than name-brand windows. Our windows feature:
- Triple-pane glass instead of double.
- Krypton gas fill, which is four times more efficient than argon gas.
- SmartCore foam insulation, which is much more efficient than a hollow frame.
- Composite reinforcement in all frame and sash cavities to support energy efficiency and structural integrity.
- 100% virgin vinyl, not engineered wood and sawdust.
- Fusion-welded sash and frames for a stronger window.
- A transferable Limited Lifetime Warranty.
- A Lifetime glass breakage and seal failure warranty.
- Non-metallic spacers.
When you choose STL Windows Direct as your windows installer, you’re not just choosing a better window – you’re choosing a more comfortable home, increased energy savings and a lifetime return on investment!
Find Out More During an Estimate!
When you’re looking for a windows installer in St. Louis, look no further than STL Windows Direct. Find out more about ecoSmart 365 windows by scheduling a free estimate. Call us at (314) 690-5800 or submit our contact form to connect with our team!