Lock it down: enjoy a free upgrade on security film and anti-theft locks.
5-Star Google Rating
ENERGY STAR® Certified
75 Years of Experience
Proudly Canadian
Your safety, our treat—free upgrade on every security product.
Offer valid until December 31st, 2025
Upgrade your windows and doors with built-in protection. For a limited time, all security products come with a complimentary boost—security film and an anti-theft lock included at no extra cost. Stronger, safer, smarter.
Personalize your home with stylish, factory-applied colours that match your vision — without paying a premium.
$250 Instant NTI Rebate on every window and door replaced*
Up to $5,000 in Government Rebates for ENERGY STAR®-certified upgrades*
Up to $40,000 Interest-Free Loan through the Canada Greener Homes Loan*
Additional rebates of $100 per window*
NTI installed two brand new bedroom windows in our home and did the capping for our garage, they couldn’t have done a better job!
I got quotes from many companies and NTI was by far the best quality for the best price.
Great experience replacing windows. Installers were great and went out of their way to fix a sticking latch on our front door for us.
NTI Windows and Doors can be trusted to handle any job. I would strongly recommend choosing NTI Windows and Doors for your next project.
Excellent service! Highly recommended if you value not only the products you purchase but the way they’re installed.
Had a very good experience with NTI. First-class service – possibly the best window & door installers in the GTA.
Extremely knowledgeable staff and fantastic customer service. Highly recommend.
Just had my windows done and all my worries were dealt with once I met Nidal. Very professional, knowledgeable and a pleasure to deal with.
We go beyond basic replacements — every window and door is tailored, warrantied, and professionally installed.
Triple-pane efficiency for year-round comfort and energy savings.
Competitive pricing with no middlemen or hidden fees.
Covers products and installation — no fine print.
Tailored to your home using premium Canadian materials.
Installed by trained in-house pros — never subcontracted.
Built tough to handle Ontario’s harshest weather.
Easy to operate and provide excellent ventilation.
Ideal for rainy climates; allows ventilation while keeping out the rain.
Space-saving design with smooth horizontal operation.
Space-saving design with smooth horizontal operation.
Space-saving design with smooth horizontal operation.
Space-saving design with smooth horizontal operation.
Easy to operate and provide excellent ventilation.
Ideal for rainy climates; allows ventilation while keeping out the rain.
Space-saving design with smooth horizontal operation.
Easy to operate and provide excellent ventilation.
Ideal for rainy climates; allows ventilation while keeping out the rain.
Space-saving design with smooth horizontal operation.
NTI Windows is your trusted window and door partner across Southern Ontario, offering expert service and high-performance products to homeowners in:
Oakville • Burlington • Downtown Toronto • Hamilton • Niagara Falls • St. Catharines • Richmond Hill • Forest Hill • Markham • Thornhill • Maple • Vaughan • Woodbridge
Not sure if you’re in our service area? Call us to find out!
Call A RepresentativeOffer available for a limited time. Restrictions apply.
