High-Performance Vinyl Window Replacement Across Toronto & Ontario

Replace drafty, outdated windows with custom, energy-efficient vinyl windows engineered for Canadian weather and installed by a local, WSIB-insured team you can trust.

Across Toronto and Ontario, thousands of homes still rely on original builder-grade windows that were never designed for today's energy costs or climate extremes. UGS Windows & Doors specializes in premium vinyl replacement windows built specifically for Ontario conditions — from humid GTA summers to deep northern freezes. Using reinforced, multi-chamber uPVC frames, advanced Low-E, argon-filled glass and professional retrofit or full-frame (brick-to-brick) installation, we help you stop energy loss, cut outside noise and give your home a cleaner, more modern look that lasts.

✓Energy-efficient, custom-sized vinyl windows for residential new builds and replacement projects
✓Professional retrofit and full-frame (brick-to-brick) window installation across Toronto and Ontario
✓Clean, efficient one-day installation for most homes in Southern Ontario
✓Local, WSIB-insured installers only – no random subcontractors, no "cash" crews, no shortcuts

Get My Free Window Assessment Explore window styles & installation options

Professional vinyl window installation in Ontario home

Why Ontario Homeowners Replace Their Windows

If your windows are 15–20 years old or more, they are quietly costing you money and comfort every month. Older aluminum or basic wood units let heat escape, allow drafts to creep in and do little to block traffic noise or harsh sunlight. Many Ontario houses still have single-pane or early double-pane glass that simply can't keep up with modern energy prices and climate swings.

Common problems with old windows

✕Cold drafts and noticeable hot/cold spots near windows
✕Condensation or fog trapped between glass panes
✕Warped, rotten, peeling or swollen frames
✕Windows that stick, won't lock properly or feel unsafe
✕Street and neighbour noise easily heard inside
✕Heating and cooling bills that keep creeping higher every year

What new vinyl replacement windows can deliver

✓Stable, even temperatures from room to room
✓Noticeably quieter interiors and better sleep quality
✓Brighter, more welcoming living spaces with natural light
✓A fresher, updated exterior that instantly improves curb appeal
✓Increased resale value and a more attractive listing when it's time to sell
✓The calm feeling of knowing your home is finally sealed and protected properly

Every season you delay window replacement, you're paying to heat and cool the outdoors. New windows turn that wasted money into long-term comfort, value and peace of mind.

Window Styles We Install Across Toronto & Ontario

We install a complete range of custom vinyl window styles for homes throughout Toronto and Ontario. Every window is made to your exact dimensions, finished in your preferred colour and grille pattern and paired with insulated glass packages tuned to your climate zone, exposure and noise level.

Casement Windows

Casement windows are hinged at the side and open outward with a smooth crank handle. When closed, the sash compresses tightly against high-quality weatherstripping — wind pressure actually pushes it tighter, making casements one of the most air-tight, energy-efficient window styles available.

Best for: living rooms, bedrooms, above kitchen sinks and any space where you want maximum ventilation and a clear, open view

Why Ontario homeowners love them: top-tier energy performance in windy or exposed locations and excellent sound reduction along busy streets.

Awning Windows

Awning windows are hinged at the top and open outward from the bottom, creating a protective "awning" that lets fresh air in even during light rain. They're often installed higher on the wall for privacy or combined with large picture windows in modern designs.

Best for: bathrooms, basements and as upper transom windows above fixed units

Bonus: you can ventilate safely in wet weather without letting water into your home.

Single & Double Sliding Windows

Sliding (or gliding) windows move horizontally on durable rollers and do not project outward, which makes them ideal where exterior space is limited — along walkways, decks and narrow side yards.

Best for: basements, smaller bedrooms, tight side or backyard spaces

Technical plus: reinforced interlocks between sashes help reduce air leakage and improve security when the window is locked.

Single-Hung & Double-Hung Windows

Hung windows feature vertically sliding sashes. In single-hung windows, the top sash is fixed and the bottom sash moves; in double-hung windows, both sashes open and tilt in for easy cleaning.

Best for: traditional Ontario homes, upper floors and locations where you want simple ventilation with classic curb appeal

Key benefit: the tilt-in feature lets you safely clean exterior glass from inside — no ladders, no risky climbing.

Bay & Bow Windows

Bay and bow windows extend out from the wall, creating a cozy interior alcove and a striking architectural feature outside.

Bay windows: usually three units — a large central picture window flanked by two operating casements or hungs at a 30° or 45° angle.
Bow windows: four or more equal-sized units forming a gentle curved projection.

Benefit: They add usable interior space, create a deep sill for plants or seating and flood your room with natural light.

Picture & Fixed Windows

Picture windows are fixed (non-operating) units designed to maximize views and thermal performance. They are often combined with casement, awning or slider windows to create dramatic wall-to-wall glass configurations.

Best for: rooms with great views, stairwells, two-storey spaces and high walls

Benefit: the highest possible glass-to-frame ratio with excellent energy performance.

Tilt-and-Turn Windows

Tilt-and-turn windows offer two functions in a single sash. Turn the handle one way and the top of the window tilts inward for secure, gentle ventilation. Turn it another way and the sash swings inward like a door for a wide opening and easy cleaning.

Best for: modern renovations, high-performance homes and upper floors where safe cleaning from inside is essential

Why they stand out: exceptional air-tightness when closed and flexible ventilation modes depending on the season.

Basement & Egress Windows

Basement and egress windows have to balance daylight, ventilation, moisture control, security and Ontario building code requirements. Poorly designed or installed units can lead to cold, damp lower-level spaces.

✓Meet Ontario building code clear-opening and egress requirements
✓Help keep lower-level rooms warmer, drier and more comfortable
✓Improve security with quality locks, reinforced frames and proper installation

Not sure which combination of casement, slider, hung, bay or tilt-and-turn makes sense for your home?

Our specialists map out every room and design a window package that matches your layout, budget and performance goals.

Why Choose Vinyl Windows for Ontario Homes?

For decades, wood was standard and aluminum was seen as "modern". In real Ontario weather, though — repeated freeze-thaw cycles, driving rain, humidity and road salt — high-quality uPVC (unplasticized vinyl) frames consistently outperform both.

Durability in real weather

Vinyl does not rot, warp, swell or peel. It doesn't absorb moisture like wood and doesn't conduct cold the way aluminum does. That means fewer drafts, fewer service issues and no more scraping and repainting frames every few years.

Low maintenance — truly low

There's no staining, sanding or painting. A quick wipe with mild soap and water keeps vinyl frames looking new, even after years of Ontario winters and summers.

Strong thermal performance

Multi-chamber vinyl profiles trap air inside the frame, creating natural insulation barriers. Combined with modern double- or triple-pane Low-E, argon-filled glass, vinyl frames help reduce heat transfer and keep your home comfortable in every season.

Better long-term value

When you factor in lower maintenance, longer service life and ongoing energy savings, quality vinyl replacement windows typically deliver a better total cost of ownership than comparable wood or aluminum systems — especially in Ontario's demanding climate.

Choosing vinyl isn't about cutting corners — it's about choosing the window material that actually makes sense for Ontario conditions.

Advanced Glass Technology for Energy-Efficient Windows

A window is mostly glass — around 80% of its surface area. That's why the performance of the insulated glass unit is just as critical as the frame. Our sealed glass units are engineered to meet or exceed Energy Star® criteria for Ontario and provide real-world savings on heating and cooling bills.

Double-Pane vs Triple-Pane Glass

Double-pane

Two layers of glass separated by a spacer and filled with argon gas. This is the standard for modern residential windows, offering strong thermal insulation and noticeable noise reduction compared to old single-pane or basic builder-grade units.

Triple-pane

Three layers of glass with two insulated chambers. Triple-pane units deliver higher R-values, better condensation resistance and superior sound control — a smart upgrade for north-facing rooms, bedrooms and homes near highways, busy streets or rail lines.

Low-E Coatings & Argon Gas

We use microscopic Low-E (low-emissivity) coatings on selected glass surfaces. In winter, Low-E helps reflect interior heat back into your home. In summer, it reduces solar heat gain and blocks a significant portion of UV rays that can fade flooring, furniture and fabrics.

Between the panes, we use argon gas — a non-toxic, inert gas denser than air. Argon slows thermal transfer, acting like an invisible blanket between indoor and outdoor temperatures and boosting overall window performance.

Warm-Edge Spacers & Condensation Control

Our warm-edge spacer systems separate the glass panes while reducing heat loss at the edges, where condensation tends to form first. This helps minimize condensation build-up along the frame, especially during the coldest Ontario nights, and extends the life of your sealed units.

You don't just "get new windows" — you get small engineered systems working 24/7 to protect your home, improve comfort and save energy while you sleep.

Window Installation Options: Retrofit vs Full-Frame (Brick-to-Brick)

Even the best window will underperform if it's installed poorly. Correct installation is the line between a window that quietly does its job for decades and one that becomes a constant source of drafts, leaks and frustration. We offer two professional installation methods across Ontario and explain which is right for each opening in your home.

Method 1

Retrofit Installation (Insert Windows)

Retrofit, or insert installation, keeps your existing wood or metal frame and interior trim in place. We remove the old sash and hardware, install a new custom-sized vinyl window into the existing frame, insulate all accessible gaps and finish the exterior with low-maintenance aluminum capping.

Benefits:

✓Less invasive and typically faster
✓More budget-friendly than full-frame replacement
✓Preserves existing interior trim, shutters and casing you may want to keep
✓Ideal when existing frames are structurally sound and free from hidden rot or moisture damage

Retrofit window replacement is common in newer Ontario homes where frames are still in good condition but glass, seals and hardware are failing.

Method 2

Full-Frame / Brick-to-Brick Replacement

Full-frame (brick-to-brick) installation means we remove the entire old window assembly — frame, jambs, brickmoulds, insulation and interior casing — right back to the rough stud opening.

Our full-frame process:

1Carefully remove the old unit and inspect the opening for hidden wood rot, mold or structural issues.
2Repair and prepare the rough opening as needed for a solid, square base.
3Install a new custom-sized vinyl frame with proper shimming and fastening to manufacturer specifications.
4Apply high-density spray foam insulation around the frame to eliminate air gaps.
5Finish with new interior jambs and trim, plus custom exterior aluminum capping for a clean, sealed appearance.

Full-frame replacement:

✓Maximizes energy efficiency and air-sealing
✓Eliminates hidden rot, moisture problems and poor previous installations
✓Allows changes to window size, style or position in the wall
✓Provides a completely fresh, updated look inside and out

Not sure whether retrofit or brick-to-brick is right for your home?

During your free assessment, we inspect each window and explain the pros and cons of both options in plain, honest language.

Request Free Assessment

Ready to Upgrade Your Windows and Doors?

Tell us a few details about your home and your goals — warmer rooms, lower energy bills, less street noise or a fresh new look — and we will contact you within one business day with next steps. No pushy sales tactics, just honest advice based on what works for homes in Toronto and the GTA.

House blueprint diagram showing window measurements