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ThermaTru Doors - Where Home Begins

Home Begins At the Door.
Ready To Make a Grand Entrance?

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Allegiant Door and Window


, Munster, IN 46321


Hours subject to change due to holidays or other events

  • Monday: 7:00 AM - 8:00 PM
  • Tuesday: 7:00 AM - 8:00 PM
  • Wednesday: 7:00 AM - 8:00 PM
  • Thursday: 7:00 AM - 8:00 PM
  • Friday: 7:00 AM - 8:00 PM
  • Saturday: 8:00 AM - 5:00 PM

About Us

At Allegiant Door and Window, we understand that a brand new door can add much more to your home than just curb appeal. It can also create a more energy efficient household. Professional installation combined with unparalleled door performance, will ultimately result in a door that will cut down on utility costs and create a more secure entryway for you and your family.

Our certified installers have the knowledge and experience to explain why something is being done, not just what is being done, so that you will have a good understanding of the processes required to replace your door. Contact us today to answer any questions you may have about having a new door installed or to schedule your door installation. Therma-Tru doors can handle years of abuse by mother nature and still look as good as the day they were installed due to superior craftsmanship. The Therma-Tru Certified Door System Installer status recognizes our ability to complete the installation in a professional manner that addresses all the issues that you can not see from the exterior. The techniques hidden behind the trim are just as important as a well built door. We take pride in the techniques we hide behind the trim, because a door that is not installed properly can do just as much harm as the door that was taken out.

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Our Commitment

We deliver an entrance that performs as exceptionally as it looks. The Therma-Tru Certified Door System Installer status recognizes our ability to correctly install your Therma-Tru door. We've completed comprehensive training from experts in the field on the proper techniques to install your new entry door system for years of energy efficiency and weather resistance, insulating against extreme temperatures and resisting the damaging effects of moisture.

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