Replacement Windows

Restore the look of your home with replacement windows from XL Building Products. Whether you are replacing the original, casement windows with tinted glass in your cottage-style home in Webster Groves or simply updating the look of your charming two-story Chesterfield home, our specialists at XL Building Products are knowledgeable of all types of replacement windows for your project.

As one of the leading window wholesale distributors in St. Louis, XL Building Products has a large supply of replacement windows in a variety of frames, styles and glass options. We will help guide you through the selection process and help you choose the best windows to fit the style and desired functionality of your home or project and budget.

Ranked #1 in Consumer Reports - Vinyl Replacement Windows

We are proud to carry the full line of replacement windows by Simonton Windows & Doors, the #1 ranked vinyl replacement window by Consumer Reports. 

Since 1946, the Simonton brand has been known for providing high-performing and reliable products and has received the highest overall satisfaction rating of vinyl replacement windows. 

In addition to their longevity, performance and beautiful appearance, Simonton windows are known for a number of other features.

Why Choose Simonton

  • Double lifetime warranty.
  • ENERGY STAR® compliant.
  • Advanced glass options, to reduce heating and cooling costs.
  • A wide range of colors, woodgrain and finishes.
  • A variety of grid options and patterns.
  • Increased property value.
  • Multiple price points to fit your design and budget.

Want to learn more about our different styles of replacement windows? Contact XL Building Products in St. Louis today. Along with unbeatable delivery times and great customer service, you are sure to find the durable, quality windows you are looking for that fit your style and budget.

Premium Brands Provided by XL.