The Window Source

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Expertly Serving The

St. Louis Area



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When inviting people over, your guests must stand at your door step waiting to be welcomed in. In this time, they will have nothing to look at other than your front door.

Your door is the first thing that people see and the first impression they make of your home. Why not impress them with a new well-built door. The Window and Siding Source of St. Louis, is your go to company for all your door needs. They offer a variety of selections and products produced by ProVia, which is the best door making company in the business. Our door options include:

  • Entry doors
  • Storm doors
  • Patio doors
  • Glass doors
  • Hardware & accessories
  • And much more

ProVia doors are built to be energy efficient, beautiful and secure. We provide installation and replacement services for your door. We also work closely with you to custom build a door that will best complement your home and to guarantee your satisfaction with your new door. To get started today call us at (636) 224-2444.


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