Why Homeowners Choose NTI
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Window Wise Certified Installers
Verified training and audited installation standards. -
Dedicated In-House NTI Installation Teams
Professional crews who follow one proven install process. -
Accountable Project Management From Start to Finish
Experienced oversight at every stage — from measurement to final walkthrough. -
One Company. One Standard. Fully Backed by Warranty.
25-year product and installation warranty you can rely on.
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Your Free NTI Estimate
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Proper Measurements and Thoughtful Planning by an NTI Specialist
We measure carefully, assess the opening, and plan the project properly from the start. -
Clear Options — Not a Sales Script
Styles, performance, and pricing explained with context, not pressure. -
Transparent Pricing With Clear Assumptions
We’re upfront about scope, allowances, and what could affect cost. -
We Guide. You Decide.
Our role is to advise and answer questions — never to pressure.
About Us
Built by tradespeople with years of hands-on experience installing for Canada’s largest window and door companies.
Today, we bring that same professional standard directly to homeowners across Hamilton and the Greater Toronto Area — using Canadian-made products, certified installation, and workmanship built to last.
We used to do it for the big guys. Now we do it for you.
Proudly Canadian
Every NTI installation is handled with the same care we’d expect in our own homes.
That means properly trained installers, Canadian-made products built for our climate, and no shortcuts behind the scenes. We don’t pass jobs down a chain of subcontractors or disappear once the work is done.
When you choose NTI, you know exactly who’s showing up, what’s being installed, and why it was done that way.
Industry professionals to help you through the process of purchasing and installing Windows & Doors.
Rest assured your project will be delivered as discussed.
We remove the pressure and sales tactics from this important investment, managing every detail to meet our standards of quality craftsmanship and energy efficiency. NTI is raising the bar for customer service, quality, and transparency in the windows and doors industry, helping you maximize your investment and save money both now and over time
Changing dated Windows and Doors will allow for a more secure seal all around your home, resulting in better noise reduction and reduced energy consumption. Some of our clients mention they save anywhere from 20-40% on their utilities after a full home installed by us.
Yes, The Canada Greener Homes Loan (up to $40,000) offers interest-free financing to help Canadians make their homes more energy efficient and comfortable.
You can apply and view more information here
All windows are energy star certified and comply with NAFS (North American Fenestration Standards)
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