New windows and doors, measured, made and installed right.

GTA WindowPlex supplies and installs energy-efficient windows and doors for homes across the Greater Toronto Area and Central Ontario.

Call for a free estimate Send a text

All work guaranteed against defects in materials and workmanship.

What we do

From a single basement window to a whole-house replacement, we handle the supply, installation and finishing, so you deal with one company from start to finish.

Replacement windows

Casement, awning, double hung, sliders, bay and bow windows, built for Canadian winters.

Entry doors

Steel and fibreglass doors with sidelites, transoms and decorative glass inserts.

Patio & garden doors

Sliding and hinged patio doors that seal tight and glide smoothly.

Basement windows & wells

Larger basement windows, egress windows and new window wells for light and safety.

New openings

Cutting new window and door openings in foundations and walls.

Leak & draft repair

Fixing water infiltration, failed caulking and drafts around existing windows and doors.

Careful planning goes into every project we take on.All products and installations are guaranteed against defects in materials and workmanship.

Our work

Real installations by our crew on homes across the GTA and Central Ontario.

Black arch-top windows on a painted brick home — Whole-house replacement in black

Black windows and entry door on a light brick home — Windows and entry door, matched in black

Arch-top, round and dormer windows on a brick home — Custom arch-top and round windows

White arched casement windows with grilles — Arched casements with decorative grilles

Sandalwood arched gable windows — Arched gable windows in sandalwood

Sandalwood casement and half-round windows — Casements with a half-round transom

Dark brown entry door with sidelites and arched transom — Entry door with sidelites and arched transom

Dark wood-grain double entry doors on a red brick home — Double entry doors in a wood-grain finish

Dark wood-grain entry door with two glass sidelites — Entry door with full-height sidelites

Black double entry doors with diamond-pattern decorative glass — Black double doors with decorative glass

Double entry doors with wrought-iron glass and a tall arched transom, with dark windows — Double doors with wrought-iron glass and arched transom

Modern black double doors with horizontal glass lites and a sidelite — Modern double doors with a sidelite

Wrought-iron scrollwork glass inserts glowing at night — Wrought-iron glass inserts, lit from inside

Double doors with a contemporary circular glass design at night — Contemporary glass design, lit from inside

Product catalogues

Browse the entry doors, patio doors, decorative glass, wrought iron and internal mini blinds from the manufacturers we work with, then call us with the model you like.

NovatechSteel entry doors, garden doors and doorglass.2026 entry doors catalogue ↗

MasterGrainFibreglass entry doors with a realistic woodgrain finish, made in Ontario.2026 fibreglass doors brochure ↗

TrimliteDecorative door glass, wrought iron inserts and fibreglass doors.2026 door glass catalogue ↗2026 fibreglass doors catalogue ↗

Oceanview Patio DoorsSliding patio doors made in Toronto, with Cardinal Endur® insulating glass. Essential, Premium and Premium Plus collections.Patio door collections ↗Brochures ↗

The glass in our windows

Our sealed glass units are made by Cardinal Glass Industries, with a warm edge spacer, Low-E coatings and argon gas between the panes.

Edge of a double-pane sealed unit, shown in cross-section.

Warm edge spacer

Cardinal XL Edge® and Endur® spacers are stainless steel with a dual seal. The edge of the glass stays warmer, so you get less condensation in winter.

Low-E coatings

LoĒ-180 lets in more of the sun's warmth, a good fit for cold winters. LoĒ²-272 balances winter insulation with summer heat control. We'll help you choose.

Double or triple pane

Double-pane units suit most homes. Triple-pane adds insulation and cuts outside noise.

More about Cardinal insulating glass ↗

How it works

A clear, simple process with one point of contact.

Free estimate
We visit your home, measure every opening and talk through styles, colours and budget.
Custom order
Your windows and doors are made to the exact measurements of your home.
Installation
Our crew removes the old units, installs, insulates and seals the new ones.
Finish & clean-up
We finish the trim and caulking inside and out and leave your home clean.

Where we work

Homes across the Greater Toronto Area, the Golden Horseshoe and Central Ontario.

TorontoMississaugaBramptonVaughanRichmond HillMarkhamNewmarketOakvilleBurlingtonCaledonHalton HillsDurham RegionBarrie & Simcoe CountyDufferin CountyNorthumberland County

Get your free estimate

Call, text or email us. Tell us what you'd like to replace and where you are, and we'll set up a time to come and measure.

647-739-0909

Call now Send a text

Or email windowplex1@gmail.com

To speed things up, mention:

How many windows or doors
Your city or neighbourhood
A photo of the current windows, if you have one