St. Louis’ Highly Efficient Replacement Window with High Standards… Save Energy with Every View, 365 days a year.
Replacing your windows can be about more than just an upgrade – it’s a chance to show off your unique style and personality!

At STL Windows Direct a division of STL Design and Build, we chose the ecoSmart 365 system of windows because they offer a wide range of options and heat-reflective painted colors that benefit our customers. Not only are they a wonderful option for energy efficiency, but there is something to fit any home’s aesthetic.
Transform your home with a beautiful window that lets the light in and keeps the heat and cold out! Browse our ecoSmart 365 window options below.

Double hung windows are one of the most popular choices amongst homeowners and you can see why. They offer great performance, classic style, and ease of use. By opening at both the top and bottom, you and your family can benefit from better airflow and ventilation. Both sashes raise and lower to tilt inside for effortless cleaning. Plus, the screens are removable from inside the home. They are a smart investment into the overall energy efficiency of your home.
Double Hung Window Features:
- Low profile cam action lock and matching die cast tilt latches
- ecoCore full composite reinforcement
- Easy-to-grip lift handle
- Patented SmartCore insulation
- RigidCore at the meeting rails
- 18 points of high-performance fin and pile weatherstripping
- Ventilation limit latches

A sliding window is similar to a double hung window, but both sashes slide open horizontally with the simple push of a finger and can lift out for easy cleaning. With decorative grille choices and woodgrain options, you can give these windows a unique look that’s all your own.
Sliding Window Features:
- ecoCore reinforcement fusion-welded to frame and sash
- SmartCore foam insulation
- RigidCore at the meeting rails
- Roller system that glides open with ease
- Pull rails
- Ventilation limit latches
- Securely locks windows while partially open

Casement and awning windows are a great choice in traditional and contemporary homes alike. They provide full ventilation and are easily opened outward and closed tightly with operating handles that never interfere with blinds or shades. Plus, casement windows are easy to clean from the inside when cranked out to 90 degrees.
Casement and Awning Window Features:
- Multi-point locking system
- Folding nested operator handles and matching locks
- Triple weatherstripping

Show off your personality and character with a window that’s as unique as your home! Picture windows come in a variety of shapes and sizes, such as triangles, pentagons, octagons, ovals, arches, and customized radius designs. You can also add designer glass to your special window for an elegant touch.
Picture and Shaped Window Features
- Fusion-welded frames
- Triple-glazed units with Low-E and krypton
- Optional designer glass

A bay or bow window is perfect for a room with a view! They have anywhere from two to four openings at angled projections, all meant to truly open up the room. Our windows come in a wide range of options, including fixed, double hung, or casement, and can be made with all the same great features of each style!
Bay and Bow Window Features:
- Seat insulation
- Corian® Solid Surface seat options
- A variety of interior frame head, seat, and jamb options

Garden windows are three-dimensional windows that extend out of the side of the house and create a little nook that lets in the light from all sides for growing herbs, plants, and flowers. Garden windows from ecoSmart 365 feature casement style sidelites to keep cold temperatures out but still let the fresh air in!
Garden Window Features:
- Folding operator handles and matching locks
- Corian® Solid Surface seat options
- A variety of interior frame head, seat, and jamb options
See Something You Like? Contact our STL Windows Direct team to Install an ecoSmart 365 Window in Your Home!
At STL Windows Direct, our ecoSmart 365 products are made using state-of-the-art technology and always meet strict standards of excellence in the residential window industry. Each window comes with a Limited Lifetime Warranty for as long as you live in your home. This means that the warranty will cover issues with the sash, frame, glass breakage, seal failures, screens, hardware, and more. Plus, if you decide to move, it’s transferable to the next homeowner for an added benefit that increases resale value! – call us to learn more (314) 690-5800.




Looking for Vinyl Replacement Windows? Get an Estimate With Us!
Vinyl replacement windows from STL Windows Direct offer maximum return on your investment with ENERGY STAR®-rated energy efficiency, fusion-welded sashes and frames to block out air and water, plus a lifetime warranty. When it’s time to upgrade your windows, contact us to schedule a free estimate for our ecoSmart 365 window replacement options. Call us at (314) 690-5800 or you can reach us through our online contact form!