Replacement Windows in St. Louis

ProVia windows in every style, measured, installed and backed by our own crew across St. Louis.

STL Windows and Doors is your trusted window contractor for replacement windows in St. Louis. We offer energy-efficient, beautifully crafted residential windows designed to enhance both the comfort and style of your home. High-quality windows are not only better for insulation, but they also improve your home’s curb appeal.

Our in-house team of certified installers ensures that every installation meets the highest standards. See for yourself how we mark out and bend the metal for a precise fit, and how we prep the sill before every install.

Whether you’re looking to improve insulation, update your home’s exterior, or increase property value, we provide durable, long-lasting window options. Get a fast and free in-home estimate today.

A 10-year workmanship warranty on every window installation.
Limited lifetime transferable product warranty*.
Family-owned and operated with a 4.9-star rating
Friendly service – competitive pricing – great selection

Window Styles

Colors & Finishes

ProVia Awning & Casement Replacement Windows

St. Louis Window Replacement Experts

If you’re looking for a window and door replacement company in St. Louis, MO, STL Windows and Doors is the best choice as a Platinum ProVia Dealer, offering top-quality, energy-efficient windows built to last.

ProVia windows offer a high level of customization, ensuring you get the exact style and features that match your needs. With professional-class standards, these American-made windows have all the latest must-have features that homeowners want.

To get your window replacement project started, begin with an in-home evaluation to help you select the right products before placing your order. Our in-house team of St. Louis window installers will handle the entire process to ensure a great experience. See a recent whole-home window replacement project we completed. If you want a deeper understanding of the process, costs, and what to expect, review our guide, Window Replacement: The Buyers Guide for St. Louis Homeowners (2026).

2026 ProVia Platinum Dealer and Certified Installers

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WINDOW STYLES & Designs

Looking for windows that combine energy efficiency with beautiful style? Our ENERGY STAR® certified replacement windows come in classic, modern, and custom designs to match your home and budget.

We install all popular window styles, including double-hung, slider, casement, hopper, picture, garden, bay & bow, and custom architectural shapes. Every window is custom-sized and professionally installed for a tight fit that reduces drafts, improves comfort, and helps lower energy costs.

Double hung

The most common replacement. Both sashes move, and they tilt in to clean.

Single hung

The top sash stays fixed and the bottom one opens. Simple and budget friendly.

Slider

Glides sideways, which suits wide openings and easy operation.

Casement and awning

Hinged to crank open for strong airflow and a tight seal.

Hopper

Tilts in from the top. A small window for basements and tight spots.

Picture

Fixed glass for the widest view and the most daylight.

Garden

A glass box that projects out, with a shelf for plants.

Bay and bow

Angled windows that push out to add space and light.

Architectural and shaped

Arches, circles and custom shapes for a standout exterior.

Basement

Replacement windows sized for below-grade openings.

Dormer

Replacement windows for dormers, flashed and sealed against weather.

Find the Right ProVia Window Line

ProVia makes its windows in four vinyl lines that differ in color, glass and price. See how they compare in our vinyl replacement windows overview, or go straight to the line you have in mind.

EndureMost colors and glass choicesSee the Endure line AerisReal wood inside, vinyl outsideSee the Aeris line AspectENERGY STAR at a middle priceSee the Aspect line EcoLiteWhite vinyl at a friendly priceSee the EcoLite line

View Our Product Brochures

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Rated Excellent by St. Louis Homeowners

      EXCELLENT  
   Based on 199 reviews 
    
 
 
 
   
 
 
      Posted on Google  
   
   Jeff Gordon 
 
 
 
 Trustindex verifies that the original source of the review is Google. Peyton and Max installed 21 new windows and a new front door. They were a pleasure to work with, especially since we had other home improvement projects going at the same time. They did meticulous work and answered all of our questions.
  
 
     Posted on Google  
   
   Mike Kelly 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a great experience with STL Windows and Doors. They we're booked up initially, but they still were able to setup an appointment and put me on the schedule.

This company has great prompt customer service, fair pricing, and great professionalism. I would highly recommend their service.
  
 
     Posted on Google  
   
   Anne Croy 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service with initial sale and installation!!  High quality product.
  
 
     Posted on Google  
   
   Vivian Saied 
 
 
 
 Trustindex verifies that the original source of the review is Google. I used Stl windows and doors to replace half of the windows in my house and a sliding door. The whole process was excellent. From talking with Dan, the sale manager to the installers (Tony and his crew ) to Scheduling with Chris at the office. First of all, Chris was able to up my schedule date a week early upon my request. I'm sure he squeezed me in his tight schedule. I was very thankful. Tony and his crew were very professional, yet  friendly and considerate. They were prompt on time the 3 days they came and very efficient. They took down my window treatments and put them back up again exactly the way they were. They moved furniture and put back.  They took the time to explain how the windows opened from top to bottom as the windows had many options that my old windows didn't have. I would use them again and would definitely recommend them to my family and friends
  
 
     Posted on Google  
   
   Elizabeth Purcell 
 
 
 
 Trustindex verifies that the original source of the review is Google. Worth the wait! Price was insanely different from other bids for a single window replacement. Paid cash for a slightly better rate. Originally was going to need to wait 8 months for replacement but I got lucky & they fit me in at the 4 month marker since they had a cancellation.  Customer service from Kaleb & Tony was outstanding.  Both were very personable & made me feel confident that the job was being done well.  Great warranty! Glad to check this off my list:)
  
 
     Posted on Google  
   
   Aaron Fox 
 
 
 
 Trustindex verifies that the original source of the review is Google. STL Windows and Doors did an excellent job with our window replacement project. We live in an older home (over 100 years old) and we know there are going to be issues related to its age. The STL Windows and Doors team worked extremely hard with us to replace one of our bathroom windows that had begun to show signs of water damage. After the initial window replacement project was finished, we did communicate with their team about concerns we had with the original window frame that remained. Chelsea worked with us and a team (Tony and Caleb) came to our house within a week and replaced the frame as well. Their prices were reasonable and they had an array of choices. Overall, we highly recommend them for any window-related project you may have!
  
 
     Posted on Google  
   
   Jake Bloomer 
 
 
 
 Trustindex verifies that the original source of the review is Google. Experience was great, STL W+D replaced our old rear door and transom with a new eight-foot unit. It’s great to have this huge pane of glass looking out over the back yard. Installers were great and clean and shimmied the door in without removing our old casing and messing with the plaster. They know what they are doing!
  
 
     Posted on Google  
   
   Randall H 
 
 
 
 Trustindex verifies that the original source of the review is Google. The removal of the old window and the installation of the new window went more smoothly than I would have expected. Peyton and Max were knowledgeable, professional, and completed the installation beautifully and efficiently. Both of them did a great job with making in the new window secure, sealed, and attractive.
  
 
     Posted on Google  
   
   T Baker 
 
 
 
 Trustindex verifies that the original source of the review is Google. Premium products and service at a more affordable price. Fantastic experience at every step of the process. Had some hail and tornado damage. Jared (sales) was friendly and knowledgeable about the industry. Did not hard sell, but instead provided a balanced and very detailed explanation of STL's products and services vs competitors, which felt trustworthy. Dan (owner) came out to measure the windows. My spouse said he was friendly and answered her questions. We got an unexpected scheduling break and installed much sooner than the expected wait. The installers, Peyton and Max, were friendly, efficient, and conscientious of our home. Their finish work (sealing and caulking) is better than the original for the house. They took the time to demonstrate all the features of the new windows and how to care for them. We all noticed a defect in the glazing inside one of the window sashes, which they immediately reported to the owner who, in turn, called me immediately about the manufacturer's quick replacement. Provia warrantees the vinyl, glass, hardware and screen of the window for life and this guarantee is transferable once to a new home owner. The installation has a 10-year guarantee. Also, STL has another business for window cleaning and screen replacement, which we're going to check out.
  
 
     Posted on Google  
   
   Jessica Klemp 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great company to work with! We needed four hopper windows replaced on our garage/basement and STL Windows and Doors provided the best service and most competitive pricing. The work was done quickly and professionally, and everyone we met from the company was friendly. We would recommend calling them for your window needs!

Read all our reviews

Visit Our Earth City Windows Showroom

See ProVia window samples in person, compare styles side by side and start your quote with our team.

Before you order, we encourage our customers to talk with our staff about style selection, pricing, warranty, financing, and schedule. The goal of our owner (Andrew Lombardozzi) is to ensure every sale we make creates a happy and satisfied customer.

Opening Times:

Monday: 9:00 AM–4:00 PM
Tuesday: 9:00 AM–4:00 PM
Wednesday: 9:00 AM–4:00 PM
Thursday: 9:00 AM–4:00 PM
Friday: 9:00 AM–4:00 PM
Saturday: Closed
Sunday: Closed

Call (314) 277-5952

Directions

We recently moved our showroom to Earth City. It’s easy to find us, take I-270 north, then west on I-70, then north on Hwy 141 / Earth City EXPY.

Directions to STL Windows and Doors

Frequently Asked Questions About Replacement Windows

Here are some frequently asked questions about replacement windows. If you have other questions, please get in touch with us!

When working with a replacement window professional, any time is the best to replace windows, as professionals have the experience and tools to get the job done right, no matter the season.

We would say yes since your windows are responsible for up to 30% of your home’s heating and cooling use. Investing in new windows that are energy-efficient will save an estimated $125 to $340 a year alone.

The standard lifespan of windows is 15-20 years. Once they have reached this age, window seals weaken and fail, which causes drafts (a common issue in older homes) and water seepage. We recommend replacing your original windows every 15-20 years to maintain energy efficiency and reduce energy costs.