Window Replacement Company in St. Louis

We’re a family-owned and operated replacement window company in St. Louis. We offer ProVia replacement windows and exterior doors.  We offer free, no-obligation in-home estimates. How may we serve you today?

Replacement Windows

ProVia Endure Double Hung Window

We offer the best quality, high-energy efficiency “professional-class” replacement windows such as double hung windows.

Exterior Doors

ProVia Endure Double Hung Window

Our exterior doors offer the highest standards; durability, security, & energy efficiency like our fiberglass entry, and exterior steel doors.

About Us

ProVia Endure Double Hung Window

As a Platinum ProVia dealer & certified installer, we’ll complete your project on time and within your budget.

10 Year Workmanship Guarantee

10-Year Workmanship Warranty

When comparing window and door companies, read our reviews, and please consider that we offer a 10-Year Workmanship Warranty.  We’re so confident in the quality of our windows and doors installation that we will back up our workmanship for a full ten years from installation.  You can trust us to provide quality, value, and workmanship.



As a replacement window company serving St. Louis and surrounding cities, we’re driven by quality and integrity and pay close personal attention to everything we do.  We set ourselves apart by way of our skilled, dedicated team and offer the best in class replacement windows and exterior doors

We’re Accredited and Highly Rated

A Rating with Angie's list
A Rating with Angie's list
A Rating with Angie's list
A Rating with Angie's list
A Rating with Angie's list
A Rating with Angie's list

Free Window & Door Color Lookbook

Be inspired by downloading this new Color Lookbook that includes trends and amazing color options we offer.

Join Our Referral Program & Earn Easy Cash

Get easy cash by referring friends, family members, neighbors, and co-workers!


Here are some frequently asked questions about fiberglass entry doors.  If you have other questions please contact us!

The average cost to replace a window ranges from $375 to about $1,000 per window. It all depends on the type of window you are interested in, the quality of that window, and the manufacturer of that window. There will also be installation costs per window. Best to take advantage of our free estimate to get an accurate price quote.

We’re biased, but we believe the best company for window replacement is STL Windows and Doors.  Read through our customer reviews to hear what they have to say. We offer the best windows brand and back our window installs with a 10-year workmanship warranty.

Most experts agree that if you have the budget, you will benefit by replacing all your windows at once. If your home is older than 20 years old, it may be time to start budgeting for a complete window replacement in your home.

Visit Our Office


Ready to take the next step?  If you live in or around St. Louis, pick a deal on our free estimate form!  You can count on us!