Composite Windows
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*Purchase 4 or more windows or an entry door.
Composite windows blend the elegant appearance of a true wood window with the maintenance freedom of vinyl, the strength of metal, cutting edge energy saving and operational features into a beautiful and durable window system.
Frames and sashes are made from a proprietary mix of specialty polymer and acrylic resins, creating an “engineered composite”, super tough, solid core material. A permanent color surface technology called “SuperCap™” is fused to the core materials during the extrusion process.
The result is an extremely durable, weather and fade resistant product that is far superior to other window framing materials.
All the warmth of a finely milled wood window without the problems associated with wood!
The CompositWood material combines the beauty of wood with superior, rot-proof durability and no-maintenance attributes of vinyl. It’s a superior insulator compared to fiberglass, wood or aluminum. Combine this advanced material with the highest performing glazing, and you get greater energy savings, comfort, and durability over the long run.
EXCLUSIVE SUPERCAP™ SURFACE TECHNOLOGY
SuperCap provides a permanent pre-finished surface that performs in the harshest of weather conditions. Proven with years of extreme outdoor sun exposure testing in Florida and Arizona, SuperCap meets or exceeds AAMA 613 color standards. A lifetime of virtually no-maintenance benefits for homeowners, this tough, capped surface protects against yellowing from ultraviolet light exposure, erosion, chalking and cracking to keep windows and doors looking good over time.
Inspiration Gallery
Composite Window Features
- Classic wood casement window designed frame and sash for an elegant appearance
- Solid core frame and sash for superior thermal performance and strength
- Draftblocker™ compression seal design and multipoint sash locking hardware for incredible air-tight performance and added security
- Tripled-secured sash & frame corners: mortise & tenon joined and chemically welded sash, fusion-welded frame, stainless-steel screw fastened
- Aesthetically pleasing low profile folding handle does not interfere with window blinds, concealed hinge hardware
- Inside mounted weather-stripped screen system deters insects 90° sash pivot for easy cleaning from inside your home
Composite Window Benefits
- Thermally superior composite material reduces energy-transfer better than wood, vinyl, fiberglass, and aluminum
- More energy-efficiency means greater savings on monthly heating & cooling costs.
- Available with highest-performance glass system for maximum savings
- Surpasses ENERGY STAR® energy performance criteria
- CompositWood windows have multiple weatherstrip paths with interlocking sash and jambs designed to reduce air infiltration
- More comfort – without air drafts you stay warmer in Winter, cooler in Summer
- Classic wood window design enhances the value and beauty of your home – inside and out
- Premium performance hardware ensures easy cleaning and operation
Why Choose Composite Replacement Windows from Window Depot USA of St. Louis?
Nothing defines a home like the elegance and warmth of wood windows, but the maintenance problems and expenses associated with wood are simply overwhelming.
CompositWood is made from a proprietary mix of specialty polymer and acrylic resins, creating an “engineered composite”, super tough, solid core material. A permanent color surface technology called “SuperCap™” is fused to the core materials during the extrusion process.
CompositWood is simply the best window you can buy. It provides the warmth of a finely milled wood window without the problems associated with wood.
Metal and vinyl clad wood windows were only partial solutions. In the industry-wide pursuit of window excellence, CompositWood is the answer.
We have the strength of 20+ years of experience, the lower prices of a large national network; the personal service and honest advice of a trusted, local company; and the best overall experience that you deserve!
Color Choices — Inside and Out
Inside, select solid SuperCap® white or CompositWood’s real Eastern pine veneer that can be stained or painted to suit your needs.
Outside, choose from SuperCap white (white interior); 14 in-stock factory painted colors; over 30 special order colors; and virtually unlimited custom matched colors (15-year paint warranty).
Unlimited Color Match Exterior Colors
Custom blended colors available to suit your design needs – limited only by your imagination!
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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