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Stylish, Energy-Efficient Windows in St. Louis


Vanguard's Unique Features. It’s what’s inside that matters.

FiberCore® – Structural Technology – For additional strength and durability.

UltraCore® – Insulated Window System – Polyurethane-insulated windows for indoor comfort and overall, top-quality window performance.

SecureSeal™ – Meeting Rail System – A fiberglass structural core with high-performance polyurethane insulation with a triple weather strip barrier.

WindBlock™ Weather stripping – This system stops wind and air by way of three continuous layers of weather stripping, featuring a center double Mylar fin for further protection. This sealing system blocks even the smallest amounts of air and ensures that your home’s comfort is not compromised.​


Features and Benefits:

  • Air-tight performance with triple weather-stripping seals.
  • Low-profile, single-lever locking handle controls up to three locking points for added security.
  • Beveled exterior design.
  • Easy operation with functional hardware for trouble-free cleaning. 

Bay Windows

Vanguard bay windows offer uncompromising style, comfort and remarkable curb appeal for any home. Make your neighbors jealous and expand more than your view with a bay window. In addition to the WOW factor these windows provide, you’ll be stunned by their extreme performance. Made for big, open spaces, Vanguard bay windows merge engineering intelligence with design-driven features and designer options to create window perfection.​

Features and Benefits:

  • High-quality seat boards, head boards and side panels are manufactured from furniture-grade, 1 1/8” thick oak veneer plywood versus typical 3/4” thick plywood.
  • Interior surfaces of bay windows are also available with optional Pionite® laminates, which eliminate the need to paint or stain the bay’s interior, while also providing greater ease of maintenance and more durability. Pionite® surfaces are available in Painter’s White, Golden Oak, Provincial Oak, Colonial Cherry or Brazilian Pecan.
  • An anti-water penetration system helps protect against unwanted water and moisture damage. This system protects your most precious investment – your home.

Bow Windows

Watch the seasons change with panoramic views of the outdoors. Vanguard bow windows give you a great view of wide open spaces. Designed with 3, 4, 5 or 6 equal lites, our bow windows offer you contemporary styling and the versatile window design you desire. With Vanguard bow windows, you’ll enjoy huge views and a greater level of overall comfort.

Features and Benefits:

  • High-quality seat boards, head boards and side panels are manufactured from furniture-grade, 1 1/8” thick oak veneer plywood versus typical 3/4” thick plywood.
  • Interior surfaces of bow windows are also available with optional Pionite® laminates, which eliminate the need to paint or stain the bow’s interior, while also providing greater ease of maintenance and more durability. Pionite® surfaces are available in Painter’s White, Golden Oak, Provincial Oak, Colonial Cherry or Brazilian Pecan.
  • An anti-water penetration system helps protect against unwanted water and moisture damage. This system protects your most precious investment – your home.

Casement Windows

Casement windows provide not only a great look but versatility with stylish and functional hardware for safe and trouble-free cleaning. Stop uncomfortable drafts from entering your home with our casement and awning windows, which have one of the industry’s lowest air infiltration rates because they feature three continuous seals of weather stripping.

Features and Benefits:

  • Air-tight performance with triple weather-stripping seals.
  • Low-profile, single-lever locking handle controls up to three locking points for added security.
  • Beveled exterior design.
  • Easy operation with functional hardware for trouble-free cleaning.

Double-Hung Windows

Vanguard double-hung windows provide time-honored window design elements, fused with a modern flair for enhanced styling options. These beautifully designed windows offer the best in class in so many ways.

Features and Benefits:

  • Minimal maintenance and easy operation with tilt-in feature, contoured lift rails and pre-tensioned, dual-pulley block and tackle balance system.
  • Advanced, triple weather-stripping seals for top efficiency performance.
  • UltraCore® polyurethane window-frame insulation provides added comfort and the ultimate in energy efficiency.
  • Coved interior glazing bead for added elegance
  • Added security with recessed pick-resistant locks.
  • Extruded aluminum screen frame with heavy-duty aluminum corner reinforcements for years for worry-free performance.

Garden Windows

Vanguard garden windows welcome additional light into your home with a view surrounded in glass. Enjoy the brilliance of the great outdoors all year round by selecting your new garden window for your favorite spot. Whether it is the kitchen, the sunroom or over your new garden tub, a Vanguard garden window will add a whole new point of view from inside or out.

Features and Benefits:

  • Ideal window space for growing plants and flowers or just showcasing your knickknacks.
  • Easy-to-reach handles with two fully operational trapezoids for worry-free ventilation.
  • Flexible window hinging with sashes that open away from your home.
  • Adjustable-height glass shelf is standard.
  • Single- or double-insulated seat boards are available.
  • Optional Corian or Poinite® laminate seat boards are available.

Sliding Windows

The Vanguard sliding door leaves a lasting impression when it is added to your favorite room. With sophistication, uncompromising security and high thermal performance, you’ll get everything you want and need to achieve your definitive look. The structural multi-point locking system is actuated with a simple turn of the knob, or the use of a key for exterior entry. For greater security, your Vanguard sliding door has 1” thick tempered safety glass encapsulated by an impressive sculpted-sash frame for enhanced architectural detail.

Features and Benefits:

  • UltraCore® polyurethane insulation for superior efficiency.
  • Three-point locking system provides greater security.
  • Optional ventilation/deadbolt foot-lock available.
  • Exclusive clash-free interlock for easy, unhampered operation.
  • Quad-seal weather stripping offers double protection over the industry standard.
  • Top-hung screen door for trouble-free operation.
  • Six door handle finishes available.