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Sliding, Patio, and Entry Doors

Entry Doors

A beautiful entry creates a dramatic first impression and a welcome focal point for your home. Make that first impression a distinctive one with an entry door system from Mills. Our door systems are built with lasting value and performance using premium quality components and workmanship.

Patio Doors

Patio Doors extend your home’s ambience to the great outdoors, visually expanding and brightening any room. And the expanded glass area means added light- so every season is more enjoyable.

With the beautiful selection of Patio Doors available at Mills Window & Door, you’ll spend more time enjoying the view and less time on maintenance! These doors never need painting and cleaning is simple. Mills offers a range of quality and value with heavy-duty fiberglass screening, aluminum frames and adjustable four-point tension system keeps screens on track. Corrosion resist tracks help keep door panels gliding smoothly for years to come. All backed by Alside’s Lifetime Limited Warranty!

Custom Made

Our doors are custom-made to fit your current doorways & openings precisely.

Custom Fit

Our doors are custom-made to fit your current doorways & openings precisely.

Easy Install

Our doors are quick & easy to install and they often require no additional wall construction!

No Additional Construction!

Our doors are easy to install and they often require no additional wall construction!

Stylish Passageways

Our sliding & patio doors create a stylish passageway for entry onto a patio, deck or backyard area

Open Your Home

Step into the beauty of your surroundings and create a majestic entryway with our stylish door selection!

Lifetime Warranty

We offer an Alside manufacturer lifetime warranty on all doors we carry.

Quality & Performance

We offer a manufacturer lifetime warranty on all of the doors we carry as our lifelong pledge to quality and performance.

Sliding Patio Doors

Promenade Sliding Patio Door Collection

Promenade Sliding Patio Door Collection

  • Create a fresh and inviting entry to your home with our Promenade Contemporary-Style Sliding Patio Door
  • We’ve given our Promenade Classic-Style Sliding Patio Door an ample measure of traditional beauty but with a tough, high-endurance build
  • Our Promenade French-Style Sliding Patio Door captures the same authentic “French door” elegance but in a floor space-saving design

6100 Sliding Patio Door

6100 Sliding Patio Door

  • Alside 6100 Series Patio Doors extend your home’s ambience to the great outdoors, visually expanding and brightening any room
  • Whether your décor is traditional, contemporary or even transitional, Alside offers the patio door to suit your needs
  • Enjoy easy access to outside living with our 6100 Series Patio Door

5100 Sliding Patio Door

5100 Sliding Patio Door

  • Exceptional design for enhanced energy efficiency
  • Beautiful choice for today’s light-filled homes and multi-family structures

A170 Series Sliding Patio Door

A170 Series Sliding Patio Door

  • Get the most out of the spring and summer months with classic sliding patio doors, a perfect blend of beauty and energy efficiency
  • Step into the beauty of your surroundings and create a majestic entry with patio doors

Swing, Hinged and French Doors

Swing, Hinged and French Doors

  • Swing, Hinged and French Doors combine classic elegance with energy-efficient glass
  • These doors serve as a stylish passageway for entry onto a deck or backyard area

Why Choose Us

  • We Install All Brands of Windows, Doors & Siding, Even if We Don’t Carry It!
  • 25+ years of Window, Door & Millwork Industry Experience in the St. Louis Area
  • We Are Known for Our Quality, Value, and Excellent Customer Service
  • We’ll Work With the Manufacturer to Get You the Best Pricing!
  • We’re a Hands-On Owner Directed Company, Small Enough to be Personal & Cost Effective, With the Resources to Get Your Job Completed.

Testimonials

I’ve had the pleasure of working with Jim and his team on two projects recently, and cannot say enough good about them! They truly care about the work they do, which makes doing business with them so easy and I can rest assured that they have our best interests at heart.
Amanda M.
We have used Mills Window and Door a number of times. The biggest project was the installation of 400 windows in a six story high rise complex. They did a superb job, and their product was excellent.
Patricia S., Personalized Property Mgt., Inc.
During my tenure as Director of Facilities and Grounds, Mills Window and Door successfully provided and installed custom windows for several historic structures at the Saint Louis Zoo. The Zoo was quite satisfied with the installation and the windows. We would not hesitate to award similar work to Mills Window and Door in the future.
David M. Vice President Architecture and Planning, Saint Louis Zoo
Mills WIndow and Door installed 454 windows on our Barclay Facility in Clayton. We were very satisfied with the outcome and would not hestitate to engage them again.
Joseph B. CEO, Bethesda Health Group