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Canadian-Made, Energy-Efficient Windows Built for Southern Ontario

  • Clear Pricing
  • Realistic Timelines
  • Quality Products
  • Expert Installation
  • 25-Year Warranty
Custom sizes. Canadian materials. Professional installation. 25-year all-inclusive warranty.
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NTI WINDOWS & DOORS

PROUDLY CANADIAN OPERATED & OWNED

NTI WINDOWS & DOORS

PROUDLY CANADIAN OPERATED & OWNED

NTI WINDOWS & DOORS

PROUDLY CANADIAN OPERATED & OWNED

NTI A new window is installed in a brick exterior wall, with unfinished trim and a stepladder positioned below it, complementing nearby sliding doors for a cohesive look. window and doors

expert services

Old Windows Cost You Money Every Month

Drafts, condensation between panes, and difficulty opening or closing are signs your windows have failed. NTI clients report saving 20 to 40 percent on their utility bills after a full home installation.

  • New windows also reduce noise
  • increase your home's market value
  • eliminate mold risk from moisture buildup
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NTI A two-story red brick house with black-trimmed windows, a small elevated wooden deck, and sliding doors that open to a grassy backyard. window and doors
NTI A brick house with a three-panel window and closed blinds, featuring elegant front doors, surrounded by patches of melting snow and sparse plants. window and doors
NTI Person installing a window screen in a white-framed window, wearing a brown jacket and cap, with bare tree branches visible outside—perfect for homes with sliding doors or backyard doors. window and doors
NTI A modern bay window with a black frame extends from a brick wall, complementing nearby garage doors. A potted plant sits on the interior windowsill, while trees and a car are reflected in the window’s glass. window and doors
NTI A white-framed sliding window in a light-colored room, with one pane partially open and bare tree branches visible outside—perfectly matching the style of your front doors and garage doors. window and doors
NTI A black-framed window set in a red brick wall, reflecting trees and power lines outside. Sliding doors lead to the space, with some tools and a cardboard box on the concrete ground below. window and doors
NTI A closed window set in a purple wall with green tree branches and leaves visible outside, resembling the view through backyard doors. A white electrical outlet is below the window. window and doors
NTI A bay window with black framing and three glass panels protrudes from a red brick wall of a building, complementing the nearby front doors. window and doors
NTI A window, similar to those used for sliding doors, is installed in front of shelves inside a house, blocking access to the shelving. Brick and siding walls frame either side. window and doors
NTI A square window with a white frame, similar to those found on stylish front doors or windows, is illuminated by a bright light source, creating glare and casting shadows on the surrounding wall. window and doors
NTI A three-story brick house exterior features large black-framed windows on each level, striking backyard doors opening to a wooden deck on the left, and an air conditioning unit on the right. window and doors
NTI A double-pane window set in a stone facade of a house, with shrubs and greenery in the foreground, reflects trees, a car, and nearby sliding doors in the glass. window and doors
NTI A kitchen window above a sink looks out onto a snowy backyard with a wooden fence, Backyard Doors, and a house in the background. window and doors
NTI A closed white-framed window is set in the upper floor of a green house with horizontal siding, above a row of sliding doors, under an overcast sky. window and doors
NTI A double-pane window with white framing looks out onto a street with houses, trees, a red fence, and nearby sliding doors on an overcast day. window and doors
NTI A single window centered in a red brick wall above a deck, with a barbecue grill and black cover on the left, a blue item on the right, and classic windows similar to those often found above front doors. window and doors
NTI Unfinished room with bare floor, tools, and debris scattered. Large black-framed sliding doors look out onto greenery. Walls are painted light beige. window and doors
NTI A double-pane window set in a white wall, partially open, with houses, a fence, garage doors, and trees visible outside. Labels are attached to the top of the window panes. window and doors
NTI A rectangular window with a black frame is set in a brick wall; trees and cloudy sky are reflected in the glass, showcasing how modern windows can blend seamlessly with nature. window and doors
NTI A large window installation is in progress in a residential room. Tools and supplies are on a table, while the exterior view through the windows shows suburban houses and trees. Sliding doors may also be part of the renovation project. window and doors
NTI A double-pane window in a room offers a view of a wooden fence, a tree, and the side of a neighboring house and garage—perfect for pairing with sliding doors to create seamless indoor-outdoor living. window and doors
NTI A white-framed window set in a yellow brick wall with a small vent covered by a lattice below, green plants in front, and matching windows that complement neighboring front doors. window and doors
NTI A frosted glass window with two documents taped to the upper section, set in a white wall above a black countertop—perfect for spaces near backyard doors or garage doors. window and doors
NTI Two-story brick house with large windows and sliding doors opening onto a wooden deck featuring stairs that lead down to a grassy backyard. window and doors
NTI Large arched window with three panels, partially covered by installation stickers, overlooks a leafy tree outside; room has drop cloths and a covered table, suggesting ongoing renovations like new sliding doors or windows. window and doors
NTI A double-pane window in a beige wall overlooks a residential street with houses, front doors, a tree, and a Canadian flag outside. Part of a bed is seen in the foreground. window and doors
NTI Three vertically aligned rectangular windows framed in black on a modern building with grey horizontal siding and sleek sliding doors, photographed from below. window and doors
NTI Large rectangular window on a gray brick wall, reflecting a tree and part of a person taking a photo. A concrete surface and sliding doors are visible in the foreground. window and doors

window types

Every Window Style. Custom Built to Your Specifications.

Casement Windows

Side-hinged windows that open outward with a crank handle. Excellent for ventilation and energy efficiency. Tight seal when closed.

Slider Windows

Horizontal-sliding windows ideal for wider openings. Easy to operate and maintain. Popular for kitchens and living rooms.

Hung Windows

Vertical-sliding windows available in single-hung and double-hung configurations. Classic look with modern energy performance.

Awning Windows

Hinged at the top and opening outward from the bottom. Perfect for ventilation during rain. Common in basements and bathrooms.

Bay & Bow Windows

Multi-panel windows that extend outward from the wall. Add space, natural light, and architectural character to any room.

Tilt & Turn Windows

European-style windows that tilt inward for ventilation or swing fully open for cleaning. Maximum flexibility in a single unit.
NTI A person in a brown jacket installs a window screen inside a white-framed window on a light blue wall, enhancing the look of residential windows. window and doors

triple-pane windows

We Recommend Triple-Pane for Every home

Triple-pane windows have three layers of glass with insulating gas between each pane. The result: better energy retention in winter, cooler interiors in summer, and noticeably reduced outside noise. For Southern Ontario’s climate, triple-pane is not a luxury. It is the correct choice for long-term comfort and energy savings. All NTI windows are Energy Star certified and NAFS compliant.

Contact Us

serving gta & beyond

Service Areas

Hamilton
Burlington
Toronto
Greater Toronto Area

get in touch with our team

Expert Window & Door Solutions Built For You

Canadian-made, energy-efficient products and custom doors. Clear pricing. Realistic timelines. 5-star rated across our Google reviews.

Get a Free Window Estimate