Follow Us
Facebook-f Linkedin-in Instagram Youtube Home
NTI Windows & Doors Logo with the letters "NTI" in large dark font, a red shape resembling a window on the left, and smaller blue text reading "Innovative Talent" below—perfect for NTI Windows and Doors or GTA Garage Doors branding. Window Replacement Hamilton & GTA
Request a Quote

our services

serving GTA Homeowners with premium custom doors & windows

  • Clear Pricing
  • Realistic Timelines
  • Quality Products
  • Expert Installation
  • 25-Year Warranty

Canadian-made, triple-pane windows and custom doors. Clear pricing. Realistic timelines. 5-star rated across 31 Google reviews.

View Services
NTI Windows & Doors Google logo above five yellow stars, showcasing a five-star review for NTI Windows and Doors—a trusted name for GTA Windows and GTA Doors. Window Replacement Hamilton & GTA

NTI WINDOWS & DOORS

PROUDLY CANADIAN OPERATED & OWNED

NTI WINDOWS & DOORS

PROUDLY CANADIAN OPERATED & OWNED

NTI WINDOWS & DOORS

PROUDLY CANADIAN OPERATED & OWNED

NTI Windows & Doors A person installs or removes a window screen from a white-framed window by NTI Windows and Doors in a room with light blue walls. Window Replacement Hamilton & GTA

proudly Canadian

Canadian Owned & Operated

NTI Windows & Doors is a 5-star rated window replacement and door installation company serving Hamilton, Burlington, Toronto, and the GTA. They specialize in Canadian-made, energy-efficient windows and doors, including triple-pane window replacements, front doors, patio doors, and custom entry systems, installed by experienced professionals. Known for clear pricing, realistic timelines, and a no-pressure process. No shortcuts. No surprises. Every project is backed by a 25-year all-inclusive warranty, with support before, during, and after installation.

Contact Us

Windows

Learn More
NTI Windows & Doors A modern kitchen sink with a stainless steel faucet is centered beneath an NTI Windows and Doors arched window, overlooking the side of a house with beige siding. Window Replacement Hamilton & GTA

Casement

Side-hinged, crank handle, excellent ventilation and seal

NTI Windows & Doors A white-framed double window by NTI Windows and Doors set in a stone exterior wall, with shrubs and flowering bushes in front. Window Replacement Hamilton & GTA

Slider

Horizontal-sliding, ideal for wider openings

NTI Windows & Doors A square window with a black frame, set in a brick wall by GTA Windows, reflects trees and sky; a stone sill sits beneath the window. Window Replacement Hamilton & GTA

Hung

Vertical-sliding, single and double-hung configurations

NTI Windows & Doors A square window with a white frame from NTI Windows and Doors sits in a purple wall, revealing green tree leaves outside during daytime. An electrical outlet is visible below the window. Window Replacement Hamilton & GTA

Awning

Top-hinged, opens outward from bottom, great for rain ventilation

NTI Windows & Doors A black-framed bay window from GTA Windows with three glass panels extends outward from a brick building. White stickers are visible on the window glass. Window Replacement Hamilton & GTA

Bay/Bow

Multi-panel, extends outward, adds space and light

NTI Windows & Doors A double-paned GTA Windows installation set in a white wall, with one pane slightly open and blue painter’s tape on the frame; leafless trees are visible outside. Window Replacement Hamilton & GTA

Tilt & Turn

European-style, tilts inward or swings open fully

Doors

Learn More
NTI Windows & Doors A hallway with wooden floors, a white NTI Windows and Doors front door with frosted glass, a staircase with wooden handrail, and a glass light fixture hanging from the ceiling. Window Replacement Hamilton & GTA

Entry Doors

Custom built, Canadian materials, steel and fiberglass options

NTI Windows & Doors A glass sliding door from GTA Windows set in a red brick wall opens to a well-lit modern kitchen with white cabinets, a center island, and wooden floors. Window Replacement Hamilton & GTA

Patio Doors

Slim profile, steel-reinforced, 2/3/4-panel configs, custom sizes

NTI Windows & Doors A modern gray garage with a closed door featuring three horizontal GTA Windows on the right side; construction cones and paving stones sit nearby. Window Replacement Hamilton & GTA

Garage Doors

Full range of styles and insulation levels

NTI Windows & Doors Closed black garage door with rectangular panel design and four NTI Windows and Doors at the top, set in a brick wall with address number 163 above. Window Replacement Hamilton & GTA

what guides us

Our Mission

At NTI Windows & Doors, our mission is to provide high-quality, Canadian-made windows and doors, coupled with exceptional customer service. Canadian-owned and operated, we are committed to transparency, hard work, and treating each client’s home as if it were our own.

Our Vision

Our vision is to set the standard for excellence in the windows and doors industry by expanding our reach, continuously innovating, and maintaining our dedication to superior service and craftsmanship.

Contact Us

get in touch with our team

Expert Window & Door Solutions Built For You

Canadian-made, Energy Star certified windows and custom doors. Clear pricing. Realistic timelines. 5-star rated across 31 Google reviews.

Ready to Start Your Project? Get a Free Estimate