Finding a reputable window replacement company in St. Louis you can trust can feel overwhelming. Not only are there endless local options to choose from, but also a flood of national companies that rush into the region following one of our infamous Midwestern storms.

With an investment this big, you want an honest window company that takes your best interests to heart instead of focusing solely on its bottom line. A local company that not only offers professional-grade products at an accessible price but installs them with the highest level of professionalism to ensure your satisfaction today and for years to come.

As an experienced replacement window company, STL Windows and Doors in St. Louis has become the go-to window contractor in St. Louis for upgrading to energy efficient windows. With top-of-the-line products, knowledgeable staff and superior customer service were among the best in the business.

ProVia Replacement Doors

How STL Windows and Doors became a leading replacement window company

Since 2013, Lombardozzi Construction has transformed homes across the St. Louis region through our contracting and door and window installation services. In just six short years, our reputation for reliability and expertise has made us a recognized name in the home improvement industry.  Thanks to referrals from our satisfied customers, were among one of the fastest growing local window installation companies.

In 2019, we rebranded our door and window installation division as STL Windows and Doors to spotlight our dedication to serving homeowners here in the town we call home. While the name may be new, we carry on the same values that made our parent Lombardozzi the best window company in St. Louis.

So why trust STL Windows and Doors with your next window replacement project?

We carry and install professional-class ProVia® windows.

ProVia has become renowned in the national home replacement window market.  One reason is for their artfully crafted windows that are both high-quality and energy- efficient. STL Windows and Doors was the first window replacement company in St. Louis to install ProVia windows. Today we’re one of only two certified installers in the area.

Energy Star Partner of the YearManufactured here in the U.S., ProVia custom windows are Energy Star® certified to lower your utility bills and provide incredible comfort 365 days a year. ProVia also offers the ultimate in reliability and durability. They test each window against the most robust requirements for ease of operation, water infiltration, noise reduction, and wind load resistance. Plus, all frame and sashes are manufactured with Sunshield® vinyl to prevent blistering, chipping and peeling for hassle-free maintenance.

Along with our installation guarantee, all ProVia windows include a limited lifetime warranty. This includes materials and craft. Have peace knowing we will take care of things should an unlikely mechanical failure occur.

Best of all, ProVia offers the on-trend styles today’s homeowners desire at a variety of price points. Are you’re looking for a picture window to give you the best view of the world outside?  What about a bay and bow to add drama to a room?  Or how about a garden window to bring the outdoors inside? No matter your desire, we can install a ProVia replacement window that fits your home’s specifications!  And rest assured, our windows will meet your unique taste and exceeds your high standards.

We have the local experience to guarantee a quality window replacement installation.

STL Windows and Doors is a family-owned window replacement company, started right here in St. Louis. Since he was 15 years old, founder Andrew Lombardozzi worked alongside his dad Tom. Tom has been a professional window installer with 40 years in the field. By the time he was 21, Andy was a full-time installer, working for local companies. Then for the next seven years, Andy founded his own contracting and window installation company.

Even with years of experience under their tool belts, Andy and his installation team, including his brother Tony and sister Hannah.  They receive continual training on the latest window product advancements and construction methods to provide our customers with the best in quality installation.

Because we’ve spent our lives dedicated to St. Louis, we know the unique challenges homeowners face. Due to our cantankerous weather, we can provide you with product choices that are not only stylish but can stand up to almost anything Mother Nature can dish out. And unlike those national competitors who rush in and out of St. Louis every summer, we’re here for you, in the long run, to ensure your complete satisfaction for years to come.

Woman Sitting Next to Window

We put our customers first. Always.

Many window and door contractors, including installation companies, are notorious for promising more than they deliver. Or for pulling the old bait and switch, telling you one thing when estimating your project and another when they invoice you.

Through his years in the field, Andy noticed that for the average window replacement company in St. Louis, sales always took precedent over customer satisfaction. He didn’t want STL Windows and Doors to be average. That’s why since day one, his vision has been to be a trustworthy window replacement company you can trust!

From your salesperson to your installer to your customer care team, our goal is to ensure your happiness at every step in the window replacement process. We’ll help you find the right ProVia products that match your home and budget and install them on a timeline that fits your busy schedule. Most importantly, we keep you in the loop throughout the entire process, so there are no surprises along the way.

Because of our focus on excellence, our window replacement company has been rated A+ by the BBB, and we continue to receive 5-star reviews from our satisfied customers.

Experience the best window company in St. Louis for yourself

Finding the best window company is a tall order, we get it.  As a replacement window company, we will deliver the personal attention you deserve as a homeowner. Whether you’re remodeling your home or considering switching your old, drafty windows, you can count on us.  Simple desire energy-efficient models, we can help. By understanding your needs and getting exact measurements, we can provide a no-surprise quote. 

Then when you’re ready, we’ll begin work on your window replacement project to improve the look and comfort of your home.

Have Questions? We Can Help!