5988 Mid Rivers Mall Drive #239. St. Peters, MO 63304

Windows & Doors

St. Louis and St. Charles Metro Area’s
Most Efficient Replacement

Premium Triple Pane Windows

No-Stone-Unturned Installation

Refreshingly Reasonable Prices

Get A FREE Quote

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The St. Louis Metro Area’s
Most Efficient

Premium Triple Pane Windows

No-Stone-Unturned Installation

Refreshingly Reasonable Prices

Get A FREE Quote

  • This field is for validation purposes and should be left unchanged.

Welcome To The Official Window Depot USA Provider For The St. Louis Metro Area

If you’re looking for a replacement window company in the St. Louis metro area that provides TRUE value, you’ve come to the right place. At Window Depot USA of St. Louis (a division of XteriorPRO), we’re a locally-owned contractor with the resources of a national company. As a result, we can provide you with best-in-class ProVia replacement windows for maximum value. Here’s how we do it…

Triple Pane Windows

Triple pane windows are lightyears ahead of double pane windows in virtually every category. It’s why triple pane is our go-to window option.

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Meticulous Installation

We utilize special installation techniques and pay our craftsmen top dollar to ensure the best window replacement in the St. Louis and St. Charles Metro area.

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Better Prices

As a local company with Window Depot USA’s national backing, we can often sell premium triple pane windows at double pane prices.

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Lifetime Workmanship Warranty

Our workmanship is so thorough that we protect your window installation with a TRUE Lifetime Workmanship Warranty.

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A Streamlined Process

We’ve implemented special protocols to minimize problems and setbacks that occur during typical window installation.

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A Company That CARES

The reason our customers love us? We CARE! We’re passionate about helping homeowners get the window project they deserve.

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What Our Customers Are Saying…

Affton, MO

“Window Depot USA of St. Louis was friendly and did a great job. Our home is much cooler with the better windows and new siding.”

Mascoutah, IL

“I purchased 10 windows from Window Depot USA of St. Louis. The installers were on time, cleaned up their messes, and provided professional-looking installation.”

Maryland Heights, MO

“Window Depot USA of St. Louis put in some windows. They were friendly and honest, did very good quality work, and were fully insured. I had no concerns at all.”

Affton, MO

“Of the 5 estimates we received, [Window Depot USA of St. Louis] definitely seemed the most knowledgeable. The window installers showed up promptly and got the entire house done in one day. The windows look great and there are no leaks.”

Brentwood, MO

“The bid process was very thorough and explained clearly. [Co-Owner] Jason was very involved and checked in regularly. Extremely hard working (and easy to work with) installers.”

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Window Depot USA & ProVia

The Dream-Team Window Partnership

Window Depot USA and ProVia have partnered up to offer premium-quality triple pane windows for an unbeatable value.

ProVia has specially developed exclusive product lines for our company. These custom-designed windows are the industry gold standard—and we can offer them to you at double pane prices!

Find out more here: Our Prices.

Find Out More About Our Window & Door Services

Why Triple Pane?

Triple pane windows are all we install. Why? Better efficiency. Better soundproofing. Better everything!

Discover The Triple Pane Difference

Window Installation

Even the world’s best window will fail if it’s incorrectly installed. We’ve developed special installation techniques to ensure the job’s done exactly right.

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Styles & Features

Our windows come in many styles and with plenty of curb-appeal-enhancing features.

Explore Your Options

Our Prices

Our unique situation lets us sell premium, feature-packed triple pane windows for reasonable prices. Bottom line: We maximize value for your dollars.

See how we provide true value

Window Energy Efficiency

What makes a window energy efficient? We break it down in our Replacement Window Energy Efficiency Guide.

Learn About Window Efficiency

Window Gallery

Window installations we’ve completed in St. Louis, St. Charles, and the surrounding areas.

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Window FAQs

Answers to common questions homeowners have about our windows.

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Patio Doors

Our beautiful ProVia patio doors are made with the same innovative energy-efficient technology as our windows.

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Entry Doors

We install ProVia products, the country’s most trusted entry-door brand.

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Our easy financing can secure you low monthly payments on your new windows and doors.

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Where We Work

Service Areas Include St. Charles County, St. Louis County & St. Clair County (IL)

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Helpful Windows, Roofing & Siding Info