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  • Windows, doors, siding… you name, we do it. Learn More >

  • We have patio doors to suit every style and budget. Learn More >

  • We go to great heights to ensure customer satisfaction. Testimonials >

  • Escape a cold, drafty winter with efficient vinyl windows. Learn More >

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Welcome to We’re an exterior home improvement company specializing in replacement windows in St Catharines and the surrounding area. How can we help you?

Working with us
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    Quality product & even better warranty

    As a Gentek Premier Renovator you get access to the best products backed by a rock solid manufacturer’s warranty.
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    Expert installation

    Our master tradesmen don’t cut any corners and the pride in their work shows in every detail.
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    You’ll save money

    Our competitive pricing and energy efficient products means save you money now and in the years to come.
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    Tested and true

    After 60+ years we know this business inside and out. We’ve built trust and longevity through dedication and honesty.
  • Get a clear view of our window quality
  • So how do we measure up?
  • Unsure where to start? We'll come to you.
  • Gentek Building Products
  • Mirage Retractable Screens
  • North Star Windows and Doors
  • MacDonald Awning
  • Lifestyle Home Products
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