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Fortify and Beautify Your Home in the London, ON, Area with New, Canadian-Made Windows and Doors

If your home’s windows and doors have seen better days and are no longer providing the level of performance you expect, look to Sentry Windows & Doors. We’re a family-owned and -operated home improvement contractor serving the London, Ontario, area, and we are dedicated to providing outstanding products, professional installation, and superior customer care. In fact, our focus on service has helped us earn and maintain an A+ rating with the Better Business Bureau.

Durable, Energy-Efficient Replacement Windows and Doors

At Sentry, we understand the demands that the often-harsh local weather can put on your home. For this reason, our windows and doors are designed to perform all year long, no matter the temperature. Our vinyl replacement windows are manufactured in Canada using materials that offer better durability than many comparable windows. They also feature low-e glass and insulated frames, which allows them to provide exceptional energy efficiency. Style options include:

  • Awning
  • Bay
  • Bow
  • Casement
  • Double-hung
  • Hopper
  • Picture
  • And more

We also sell and install steel and fiberglass entry doors and vinyl patio doors that can help leave a great impression on visitors to your home. Our steel exterior doors provide excellent protection and durability, while our fiberglass options offer the classic charm of a realistic wood grain finish. Our vinyl patio doors offer natural beauty and an array of styles and configurations to make it easy for you to choose the entryway doors that match your vision for your home.

Whether you need new windows, new doors, or both, you can count on us to ensure they are installed with precision by highly trained and certified technicians. And, we will stand behind our products and labour with a no-nonsense lifetime warranty.

If you live in the London or Sarnia area and want additional information about the windows and doors we offer, stop by our showroom at 45 Meg Drive in London or call us to schedule a consultation at your home.

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Video Testimonials
Rave Reviews from Satisfied Customers
Three-Part Project in Windsor, ON
"They were fantastic we cannot say enough! Whenever we had a problem they were here just like that!"
Pat D. of Windsor, ON
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Front-of-House Project in Windsor, ON
"I would absolutely recommend sentry to family and friends. They do what they say they are going to do. "
Marcy O. of Windsor, ON
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Front & Side Entry Door Project in Windsor, ON
"Without a doubt the experience was fantastic. The door itself is quality. The workmanship was fantastic. "
Rich D. of Windsor, ON
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Ready for More in Windsor, ON
"We're so happy with everything that was done so we called Ken up again ... Round 3 will be coming soon!"
Jackie C. of Windsor, ON
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What Our Customers Are Saying
Take a look at some of our reviews from satisfied homeowners
Liked your presentation as compared to others. Willing to work with us on our remodel.
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Tom
From Ken in sales to Isaac & Aaron the installers we had a great all around experience!
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Mario
Salesman was very efficient, explained everything clearly and simply. I didn't feel pressured at all.
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Barth W
Excellent work in all regards, would definitely recommend!!
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Wilkinson
Very nice experience of dealing with Sentry Windows. Highly recommended.
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Imran
The new slider door is simply perfect. Thank you Sentry, we would never hesitate to recommend you!
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Nancy
guild-quality
4.3 Rating
google
4.8 Rating
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