Horizontal Slider Windows

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$250 Off Windows & Doors
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*Purchase 4 or more windows or an entry door.

Enhance your home’s appeal and functionality with Vinyl Replacement Slider Windows.
These windows not only provide a sleek, modern look but also boost energy efficiency. Effortlessly slide open your windows for unobstructed views and excellent ventilation. Experience the perfect blend of style and convenience while enjoying energy savings.
Create a Scenic View While Adding Value to Your Home with our Horizontal Sliding Windows!
Wouldn’t you love to have a clear and scenic view from your windows? Sliding replacement windows from Window Depot USA will give you just that, thanks to their maximum glass exposure. Our Sliding windows will also add value to your home! Sliding windows are generally wider than they are tall.
As you can probably tell from the name, they open and close with a horizontal sliding motion. Window Depot USA of St. Louis can provide the option of an interior simulated wood finish, as well as an exterior Polymer color finish. For tremendous value on top-quality products, you’ve come to the right place! Contact Window Depot USA of St. Louis today for a free, no-obligation window quote, and let us PROVE to you that our Sliding replacement windows will exceed your expectations.
Inspiration Gallery
Horizontal Slider Window Features
- Fully-welded sash and frames
- Integral lift rail on sash
- Both Sash can be lifted inside the home for cleaning
- Triple Fin Weather Stripping
- Energy Efficient Insulated Glass
- Superior Forced Entry Resistant Locking System
- Positive, strong vent latches
- All windows are custom-made for your home
Horizontal Slider Window Benefits
- Strength, Quality & Performance
- Easy to Open and Close
- Easy cleaning from inside your home
- 25% better at keeping your home draft-free
- Glazing options for every application & budget
- 140% stronger than metal
- Ventilation with limited sash opening
- Improved energy-efficiency & performance
Learn More About Our ProVia Vinyl Replacement Windows
Decorative Options




Innergy is the innovative, energy-efficient alternative to aluminum, with added insulating properties making it 700 times better.
As the next-generation of thermal reinforcement for the industry, Innergy is able to deliver a quantum Leap above aluminum in how windows perform.
- Better Thermal Performance
Up to 700 times better than aluminum in material comparisons.
- Better Thermal Break
Impervious to cold or heat.
- Better Protection Against Condensation
Helps prevent staining that can occur with metal reinforcements.
- Better Impact Testing
Resistance to impact versus other reinforcement products.
- Better Flexibility
Will not permanently set when impacted.

Bulb seals are seamless closed-cell compression seals that prevent water from penetrating the foam cell structure. Its extruded skin provides a unique UV resistant barrier with design features that enhance the weatherstrip’s sealing performance.

Seal woven and extruded pile weatherstripping with fin provides a very effective barrier against air, water, dust and noise, sealing against even and uneven surfaces with resistance to abrasion.

Neopor gives maximum efficiency and sustainability in building products. It is comprised of many small pockets of air within a polymer matrix containing graphite. The graphite reflects radiant heat energy like a mirror, increasing the material’s resistance to the flow of heat, or R-value. Neopor is unique because it increases R-Value as the temperature outside drops.

For homeowners looking for the absolute maximum in energy efficiency.
- U Factor = 0.17
- Energystar MOST EFFICIENT
- Triple Glazed
- 2 Low E Glazing Surface Coatings
- Krypton Insulating Gas-Filled In Two Chambers
- Warm-EdgeSpacer Technology
- SHGC = 0.23
- VLT = 0.37
- Air Infiltration = 0.05
For more information on this extraordinary insulating package, please contact your local Window Depot.

Our Signature Package* With the GOLD package from Window Depot USA, your windows come with the following energy saving features:
- U-FACTOR of 0.19
- Energystar MOST EFFICIENT Awarded
- TRIPLE Pane Glazing Technology
- Dual Surface Low E
- Argon Gas Fill
- Solar Heat Gain Coefficient = 0.23
- Visible Light Transmittance = 0.37
- Air Infiltration = 0.05
This combination of price, energy performance, and overall value cannot be matched!

Chock full of features, many of which our competitors consider “upgrades”, the Silver PLUS package from Window Depot USA also gives you certified Energystar performance.
- Double Glazed
- Double Stacked Low E Glass
- Argon Insulating Gas-Filled
- U Factor = 0.27
- SHGC = 0.27
- VLT = 0.50
- Air Infiltraion = 0.05

No Company Can Provide You With More Features at a Better Price

Why Choose Vinyl Replacement Windows from Window Depot USA of St. Louis?
Our windows are constructed of SunShield® vinyl, made with a compound proven to perform better than alternative building materials. Vinyl ensures long-lasting color retention and low maintenance, plus the added confidence of a warranty against rotting, cracking, pitting, corroding, and peeling. The vinyl is resistant to rot, insect and microbial damage, never requires painting, and is easy to clean.
- Low Maintenance – Vinyl windows are the low-maintenance choice for residential use.
- Superior Weatherability – SunShield vinyl is uniquely formulated to withstand the harsh effects of weather, UV light, and southern exposure.
- Color Retention – Pharmaceutical-grade compounding and blending systems provide consistency, so you can rely on superior color and weatherability.
- Designed to Perform – Industry partnerships and ongoing research into new technologies ensure the vinyl compound exceeds industry standards, outperforms the competition and works together to offer best-in-class technology.
- Uncompromising Quality and Performance Testing – SunShield vinyl meets or exceeds the standards for strength and color retention established by the American Architectural Manufacturer’s Association (AAMA).


St. Louis’s Best Value in Replacement Windows, Entry Doors, and Sliding Patio Doors
When it comes to increasing energy efficiency, improving curb appeal, comfort, and noise levels of your home, there’s no better investment than replacement windows from Window Depot USA. But with so many different window replacement companies to choose from, how can you be sure you’re getting the best possible service?
Window Depot USA of St. Louis understands that windows and doors are more than just functional components of your home; they’re part of your connection with your neighborhood.
See What Our Happy Customers are Saying
“Great experience with Window Depot! 22 windows installed with expertise, and the ProVia windows are top quality. AC and heat runs maybe less than half compared to the failed windows that were 26 year old builder grade. Customer service was very professional, including one broken glass on delivery which they ordered immediately and replaced the sash in 2 weeks.”
Mark M.
MO
May 7, 2026
“I had a great experience with window depot stl from start to finish. Joey initially came out and took the time to go over all the details with me.He was knowledgeable thorough and fantastic to work with. When it came time for installation Ryan and his crew did an amazing job. They were professional, efficient, and the quality of their work really shows. The entire process has been smooth and I couldn't be happier with the results. I highly recommend Windows depot to anyone looking for quality windows and excellent service. Thanks again”
Amy L.
MO
May 6, 2026
“If I could give them 10 stars I would! From the first conversation with Joey, then to Ryan and his crew was absolutely top notch! The attention to detail, the care and respect for your home is second to none. When they came today to install windows in my home they laid down floor covers to protect our hardwood floors....how thoughtful! Extremely respectful of our home. Amazing job! Definitely recommend you to all my friends”
Rod
MO
May 5, 2026







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